Texas Instruments | DLPA4000 PMIC and High-Current LED Driver | Datasheet | Texas Instruments DLPA4000 PMIC and High-Current LED Driver Datasheet

Texas Instruments DLPA4000 PMIC and High-Current LED Driver Datasheet
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DLPA4000
DLPS132 – MAY 2018
DLPA4000 PMIC and High-Current LED Driver
1 Features
3 Description
•
The DLPA4000 device is a highly-integrated power
management driver. It is optimized for DLP® LED
projector systems. The DLPA4000 supports
projectors up to 32 A per LED with high-side pump
functionality. An integrated, high-efficiency buck
controller energizes the device. The drivers control
switches support the sequencing of R, G, and B
LEDs. The device contains five buck converters, two
of which are dedicated for the DLPC4422 controller
low-voltage supply. Another dedicated regulated
supply energizes the DLPA200 DMD micromirror
driver and the three timing critical DC supplies for the
DMD: VBIAS, VRST, and VOFS.
1
•
•
•
•
•
•
•
•
•
•
High-Efficiency, High-Current RGB LED Driver
with High-Side Pump Functionality
Drivers for External Buck FETs up to 32 A
Drivers for External RGB Switches
10-Bit Programmable Current per Channel
Inputs for Selecting Color-Sequential RGB LEDs
Generation of DMD High Voltage Supplies
Two High Efficiency Buck Converters to Generate
the DLPC4422 controller and DMD Supply
A High Efficiency, 8-Bit Programmable Buck
Converter (PWR6) for FAN Driver Application or
General Purpose
Two LDOs Supplying Auxiliary Voltages
Analog MUX for Measuring Internal and External
Nodes
Protections: Thermal Shutdown, Hot Die, Low
Battery, and Undervoltage Lockout (UVLO)
The DLPA4000 device contains several auxiliary
blocks. These blocks allow flexibility in LED projector
system design. An 8-bit programmable buck
converter can drive an RGB projector fan or make an
auxiliary supply line. Two LDOs can generate a
lower-current supply, up to 200 mA. These LDOs are
specified to operate at 2.5 V and 3.3 V.
The serial protocol interface (SPI) addresses all
blocks of the DLPA4000 device. These addressable
features include: the generation of the system reset,
power sequencing, input signals for sequentially
selecting the active LED, IC self-protections, and an
analog MUX for routing analog information to an
external ADC.
2 Applications
Smart Led Projectors
Screenless TV
Digital Signage
Stage Lighting
Device Information(1)
PART NUMBER
DLPA4000
PACKAGE
HTQFP (100)
BODY SIZE (NOM)
14.00 mm × 14.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
System Block Diagram
12- V Regulator
16 V to 20 V DC
Power Supplies
and Monitoring
HDMI
VGA
PROJ_ON
SPI
PWR_GOOD
PWR_ON
Front
End
Keypad
I2C
Shunt Diodes
Digital Control Block
DLPA4000
DATA
Flash
Illumination
Control
1.1 V
1.8 V
DLPC4422
DMD and
Controller Bucks
3.3 V
2.5 V
LDOs
3.3 V
GP Buck
Converter
External
High-Side Pump LED
Power
FETs
DMD
Reset
Voltage
Generator
Measurement
System
DMD Reset
Voltages and Control
Sensors
DLP650NE
DMD Data and Control
or
DLPA200
DLP650LE
Control
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
DLPA4000
DLPS132 – MAY 2018
www.ti.com
Table of Contents
1
2
3
4
5
6
Features ..................................................................
Applications ...........................................................
Description .............................................................
Revision History.....................................................
Pin Configuration and Functions .........................
Specifications.........................................................
6.1
6.2
6.3
6.4
6.5
6.6
7
9
9.1 Power-Up and Power-Down Timing........................ 55
Absolute Maximum Ratings ...................................... 7
ESD Ratings.............................................................. 8
Recommended Operating Conditions....................... 8
Thermal Information .................................................. 8
Electrical Characteristics........................................... 9
SPI Timing Parameters ........................................... 14
Overview .................................................................
Functional Block Description...................................
Feature Description.................................................
Device Functional Modes........................................
Programming...........................................................
Register Maps .........................................................
Power Supply Recommendations...................... 55
10 Layout................................................................... 59
10.1 Layout Guidelines ................................................. 59
10.2 Layout Example .................................................... 68
10.3 Thermal Considerations ....................................... 69
11 Device and Documentation Support ................. 71
11.1
11.2
11.3
11.4
11.5
11.6
Detailed Description ............................................ 15
7.1
7.2
7.3
7.4
7.5
7.6
8
8.1 Application Information............................................ 51
8.2 Typical Application .................................................. 51
8.3 System Example With DLPA4000 Internal Block
Diagram.................................................................... 54
1
1
1
2
3
7
15
15
16
36
38
41
Device Support......................................................
Receiving Notification of Documentation Updates
Community Resources..........................................
Trademarks ...........................................................
Electrostatic Discharge Caution ............................
Glossary ................................................................
71
71
71
71
71
71
12 Mechanical, Packaging, and Orderable
Information ........................................................... 72
12.1 Package Option Addendum .................................. 73
Application and Implementation ........................ 51
4 Revision History
2
DATE
REVISION
NOTES
May 2018
*
Initial release.
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Copyright © 2018, Texas Instruments Incorporated
DLPA4000
www.ti.com
DLPS132 – MAY 2018
5 Pin Configuration and Functions
PWR2_VIN
PWR2_SWITCH
PWR2_PGND
PWR2_FB
PWR5_FB
PWR5_PGND
PWR5_BOOST
PWR5_SWITCH
PWR5_VIN
PWR6_FB
PWR6_BOOST
PWR6_VIN
PWR6_SWITCH
PWR6_PGND
CH_SEL_1
CH_SEL_0
DGND
INT_Z
RESET_Z
PROJ_ON
ACMPR_LABB_SAMPLE
PWR7_PGND
PWR7_SWITCH
PWR7_VIN
PWR7_FB
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
PFD Package
100-Pin HTQFP
Top View
PWR2_BOOST
76
50
PWR7_BOOST
ACMPR_IN_1
77
49
SPI_MOSI
ACMPR_IN_2
78
48
SPI_SS_Z
ACMPR_IN_3
79
47
SPI_MISO
ACMPR_IN_LABB
80
46
SPI_CLK
ACMPR_OUT
81
45
SPI_VIN
ACMPR_REF
82
44
CW_SPEED_PWM_OUT
CLK_OUT
PWR_VIN
83
43
PWR_5P5V
84
42
THERMAL_PAD
VINA
85
41
ILLUM_B_COMP2
AGND
86
40
ILLUM_B_COMP1
PWR3_OUT
87
39
ILLUM_A_COMP2
PWR3_VIN
88
38
ILLUM_A_COMP1
PWR4_OUT
89
37
ILLUM_B_PGND
PWR4_VIN
90
36
ILLUM_B_SW
SUP_2P5V
91
35
ILLUM_B_FB
SUP_5P0V
92
34
ILLUM_B_VIN
PWR1_PGND
93
33
ILLUM_B_BOOST
PWR1_FB
94
32
ILLUM_A_PGND
PWR1_SWITCH
95
31
ILLUM_A_SW
PWR1_VIN
96
30
ILLUM_A_VIN
PWR1_BOOST
97
29
ILLUM_A_FB
DMD_VOFFSET
98
28
ILLUM_A_BOOST
DMD_VBIAS
99
27
ILLUM_LSIDE_DRIVE
100
26
ILLUM_HSIDE_DRIVE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
N/C
DRST_LS_IND
DRST_5P5V
DRST_PGND
DRST_VIN
DRST_HS_IND
ILLUM_5P5V
ILLUM_VIN
CH1_SWITCH
CH1_SWITCH
RLIM_1
RLIM_BOT_K_2
RLIM_K_2
RLIM_BOT_K_1
RLIM_K_1
RLIM_1
CH2_SWITCH
CH2_SWITCH
CH1_GATE_CTRL
CH2_GATE_CTRL
CH3_GATE_CTRL
RLIM_2
RLIM_2
CH3_SWITCH
CH3_SWITCH
DMD_VRESET
DLPA4000
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DLPS132 – MAY 2018
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Pin Functions
PIN
I/O
DESCRIPTION
N/C
1
—
No connect
DRST_LS_IND
2
I/O
Connection for the DMD SMPS-inductor (low-side switch).
DRST_5P5V
3
O
Filter pin for LDO DMD. Power supply for internal DMD reset regulator, typical 5.5 V.
DRST_PGND
4
GND
DRST_VIN
5
P
DRST_HS_IND
6
I/O
Connection for the DMD SMPS-inductor (high-side switch).
ILLUM_5P5 V
7
O
Filter pin for LDO ILLUM. Power supply for internal ILLUM block, typical 5.5 V.
ILLUM_VIN
8
P
Supply input of LDO ILLUM. Connect to system power.
CH1_SWITCH
9
I
Low-side MOSFET switch for LED Cathode. Connect to RGB LED assembly.
CH1_SWITCH
10
I
Low-side MOSFET switch for LED Cathode. Connect to RGB LED assembly.
RLIM_1
11
O
Connection to LED current sense resistor for CH1 and CH2.
RLIM_BOT_K_2
12
I
Kelvin sense connection to ground side of LED current sense resistor.
RLIM_K_2
13
I
Kelvin sense connection to top side of current sense resistor.
RLIM_BOT_K_1
14
I
Kelvin sense connection to ground side of LED current sense resistor.
RLIM_K_1
15
I
Kelvin sense connection to top side of current sense resistor.
RLIM_1
16
O
Connection to LED current sense resistor for CH1 and CH2.
CH2_SWITCH
17
I
Low-side MOSFET switch for LED cathode. Connect to RGB LED assembly.
CH2_SWITCH
18
I
Low-side MOSFET switch for LED cathode. Connect to RGB LED assembly.
CH1_GATE_CTRL
19
O
Gate control of CH1 external MOSFET switch for LED cathode.
CH2_GATE_CTRL
20
O
Gate control of CH2 external MOSFET switch for LED cathode.
CH3_GATE_CTRL
21
O
Gate control of CH3 external MOSFET switch for LED cathode.
RLIM_2
22
O
Connection to LED current sense resistor for CH3.
RLIM_2
23
O
Connection to LED current sense resistor for CH3.
CH3_SWITCH
24
I
Low-side MOSFET switch for LED Cathode. Connect to RGB LED assembly.
CH3_SWITCH
25
I
Low-side MOSFET switch for LED Cathode. Connect to RGB LED assembly.
ILLUM_HSIDE_DRIVE
26
O
Gate control for external high-side MOSFET for ILLUM Buck converter.
ILLUM_LSIDE_DRIVE
27
O
Gate control for external low-side MOSFET for ILLUM Buck converter.
ILLUM_A_BOOST
28
I
Supply voltage for high-side N-channel MOSFET gate driver. A 100 nF capacitor (typical) must
be connected between this pin and ILLUM_A_SW.
ILLUM_A_FB
29
I
Input to the buck converter loop controlling ILED.
ILLUM_A_VIN
30
P
Power input to the ILLUM Driver A.
ILLUM_A_SW
31
I/O
ILLUM_A_PGND
32
GND
ILLUM_B_BOOST
33
I
Supply voltage for high-side N-channel MOSFET gate driver.
ILLUM_B_VIN
34
P
Power input to the ILLUM driver B.
ILLUM_B_FB
35
I
Input to the buck converter loop controlling ILED.
ILLUM_B_SW
36
I/O
ILLUM_B_PGND
37
GND
ILLUM_A_COMP1
38
I/O
Connection node for feedback loop components
ILLUM_A_COMP2
39
I/O
Connection node for feedback loop components
ILLUM_B_COMP1
40
I/O
Connection node for feedback loop components
ILLUM_B_COMP2
41
I/O
Connection node for feedback loop components
THERMAL_PAD
42
GND
Thermal pad. Connect to clean system ground.
CLK_OUT
43
O
Color wheel clock output
CW_SPEED_PWM_OUT
44
O
Color wheel PWM output
SPI_VIN
45
I
Supply for SPI interface
SPI_CLK
46
I
SPI clock input
4
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Power ground for DMD SMPS. Connect to ground plane.
Power supply input for LDO DMD. Connect to system power.
Switch node connection between high-side NFET and low-side NFET. Serves as common
connection for the flying high side MOSFET driver.
Ground connection to the ILLUM Driver A.
Switch node connection between high-side NFET and low-side NFET.
Ground connection to the ILLUM driver B.
Copyright © 2018, Texas Instruments Incorporated
DLPA4000
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DLPS132 – MAY 2018
Pin Functions (continued)
PIN
I/O
DESCRIPTION
SPI_MISO
47
O
SPI data output
SPI_SS_Z
48
I
SPI chip select (active low)
SPI_MOSI
49
I
SPI data input
PWR7_BOOST
50
I
Charge-pump-supply input for the high-side MOSFET gate drive circuit. Connect 100 nF
capacitor between PWR7_BOOST and PWR7_SWITCH pins.
PWR7_FB
51
I
Converter feedback input. Connect to converter output voltage.
PWR7_VIN
52
P
Power supply input for converter.
PWR7_SWITCH
53
I/O
PWR7_PGND
54
GND
Ground pin. Power ground return for switching circuit.
ACMPR_LABB_SAMPLE
55
I
Control signal to sample voltage at ACMPR_IN_LABB.
PROJ_ON
56
I
Input signal to enable/disable the IC and DLP projector.
RESET_Z
57
O
Reset output to the DLP system (active low). Pin is held low to reset DLP system.
INT_Z
58
O
Interrupt output signal (open drain, active low). Connect to pull-up resistor.
DGND
59
GND
CH_SEL_0
60
I
Control signal to enable either of CH1,2,3.
CH_SEL_1
61
I
Control signal to enable either of CH1,2,3.
PWR6_PGND
62
GND
PWR6_SWITCH
63
I/O
PWR6_VIN
64
P
Power supply input for converter.
PWR6_BOOST
65
I
Charge-pump-supply input for the high-side MOSFET gate drive circuit. Connect 100 nF
capacitor between PWR6_BOOST and PWR6_SWITCH pins.
PWR6_FB
66
I
Converter feedback input. Connect to output voltage.
PWR5_VIN
67
P
Power supply input for converter.
PWR5_SWITCH
68
I/O
PWR5_BOOST
69
I
PWR5_PGND
70
GND
Ground pin. Power ground return for switching circuit.
PWR5_FB
71
I
Converter feedback input. Connect to output voltage.
PWR2_FB
72
I
Converter feedback input. Connect to output voltage.
PWR2_PGND
73
GND
Ground pin. Power ground return for switching circuit.
PWR2_SWITCH
74
I/O
PWR2_VIN
75
P
Power supply input for converter.
PWR2_BOOST
76
I
Charge-pump-supply input for the high-side MOSFET gate drive circuit. Connect 100 nF
capacitor between PWR2_BOOST and PWR2_SWITCH pins.
ACMPR_IN_1
77
I
Input for analog sensor signal.
ACMPR_IN_2
78
I
Input for analog sensor signal.
ACMPR_IN_3
79
I
Input for analog sensor signal.
ACMPR_IN_LABB
80
I
Input for ambient light sensor, sampled input
ACMPR_OUT
81
O
Analog comparator out
ACMPR_REF
82
I
Reference voltage input for analog comparator
PWR_VIN
83
P
Power supply input for LDO_Bucks. Connect to system power.
PWR_5P5V
84
O
Filter pin for LDO_BUCKS. Internal analog supply for buck converters, typical 5.5 V.
VINA
85
P
Input voltage supply pin for Reference system.
AGND
86
GND
PWR3_OUT
87
O
Filter pin for LDO_2 DMD/DLPC/AUX, typical 2.5 V.
PWR3_VIN
88
P
Power supply input for LDO_2. Connect to system power.
PWR4_OUT
89
O
Filter pin for LDO_1 DMD/DLPC/AUX, typical 3.3 V.
PWR4_VIN
90
P
Power supply input for LDO_1. Connect to system power.
Copyright © 2018, Texas Instruments Incorporated
Switch node connection between high-side NFET and low-side NFET.
Digital ground. Connect to ground plane.
Ground pin. Power ground return for switching circuit.
Switch node connection between high-side NFET and low-side NFET.
Switch node connection between high-side NFET and low-side NFET.
Charge-pump-supply input for the high-side MOSFET gate drive circuit. Connect 100nF
capacitor between PWR5_BOOST and PWR5_SWITCH pins.
Switch node connection between high-side NFET and low-side NFET.
Analog ground pin.
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Pin Functions (continued)
PIN
I/O
SUP_2P5V
91
SUP_5P0V
PWR1_PGND
DESCRIPTION
O
Filter pin for LDO_V2V5. Internal supply voltage, typical 2.5 V.
92
O
Filter pin for LDO_V5V. Internal supply voltage, typical 5 V.
93
GND
Ground pin. Power ground return for switching circuit.
PWR1_FB
94
I
Converter feedback input. Connect to output voltage.
PWR1_SWITCH
95
I/O
PWR1_VIN
96
P
Power supply input for converter.
PWR1_BOOST
97
I
Charge-pump-supply input for the high-side MOSFET gate drive circuit. Connect 100nF
capacitor between PWR1_BOOST and PWR1_SWITCH pins.
DMD_VOFFSET
98
O
VOFS output rail. Connect to ceramic capacitor.
DMD_VBIAS
99
O
VBIAS output rail. Connect to ceramic capacitor.
DMD_VRESET
100
O
VRESET output rail. Connect to ceramic capacitor.
6
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Switch node connection between high-side NFET and low-side NFET.
Copyright © 2018, Texas Instruments Incorporated
DLPA4000
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DLPS132 – MAY 2018
6 Specifications
6.1 Absolute Maximum Ratings
Over operating free-air temperature (unless otherwise noted). (1)
MIN
MAX
ILLUM_A,B_BOOST
–0.3
28
ILLUM_A,B_BOOST (10 ns transient)
–0.3
30
ILLUM_A,B_BOOST vs ILLUM_A,B_SWITCH
–0.3
7
ILLUM_LSIDE_DRIVE
–0.3
7
–2
28
ILLUM_HSIDE_DRIVE
ILLUM_A_BOOST vs ILLUM_HSIDE_DRIVE
Voltage
Source current
Sink current
Tstg
(1)
-0.3
7
ILLUM_A,B_SW
–2
22
ILLUM_A,B_SW (10 ns transient)
–3
27
PWR_VIN, PWR1_VIN, PWR2_VIN, PWR3_VIN, PWR4_VIN, PWR5_VIN,
PWR6_VIN, PWR7_VIN, VINA, ILLUM_VIN, ILLUM_A,B_VIN, DRST_VIN
–0.3
22
PWR1_BOOST, PWR2_BOOST, PWR5_BOOST, PWR6_BOOST,
PWR7_BOOST
–0.3
28
PWR1_BOOST, PWR2_BOOST, PWR5_BOOST, PWR6_BOOST,
PWR7_BOOST (10 ns transient)
–0.3
30
PWR1_SWITCH, PWR2_SWITCH, PWR5_SWITCH, PWR6_SWITCH,
PWR7_SWITCH
–2
22
PWR1_SWITCH, PWR2_SWITCH, PWR5_SWITCH, PWR6_SWITCH,
PWR7_SWITCH (10 ns transient)
–3
27
PWR1_FB, PWR2_FB, PWR5_FB, PWR6_FB, PWR7_FB
–0.3
6.5
PWR1_BOOST, PWR2_BOOST, PWR5_BOOST, PWR6_BOOST,
PWR7_BOOST vs PWR1_SWITCH, PWR2_SWITCH, PWR5_SWITCH,
PWR6_SWITCH, PWR7_SWITCH
–0.3
6.5
CH1_SWITCH, CH2_SWITCH, CH3_SWITCH, DRST_LS_IND, ILLUM_A,B_FB
–0.3
20
ILLUM_A,B_COMP1, ILLUM_A,B_COMP2, INT_Z, PROJ_ON
–0.3
7
DRST_HS_IND
–18
7
ACMPR_IN_1, ACMPR_IN_2, ACMPR_IN_3, ACMPR_REF, ACMPR_IN_LABB,
ACMPR_LABB_SAMPLE, ACMPR_OUT
–0.3
3.6
SPI_VIN, SPI_CLK, SPI_MOSI, SPI_SS_Z, SPI_MISO, CH_SEL_0, CH_SEL_1,
RESET_Z
–0.3
3.6
RLIM_K_1, RLIM_K_2, RLIM_1, RLIM_2
–0.3
3.6
DGND, AGND, DRST_PGND, ILLUM_A,B_PGND, PWR1_PGND,
PWR2_PGND, PWR5_PGND, PWR6_PGND, PWR7_PGND, RLIM_BOT_K_1,
RLIM_BOT_2
–0.3
0.3
DRST_5P5V, ILLUM_5P5V, PWR_5P5, PWR3_OUT, PWR4_OUT, SUP_5P0V
–0.3
7
CH1 _GATE_CTRL,CH2_GATE_CTRL, CH3_GATE_CTRL
–0.3
7
CLK_OUT
–0.3
3.6
CW_SPEED_PWM
–0.3
7
SUP_2P5V
–0.3
3.6
DMD_VOFFSET
–0.3
12
DMD_VBIAS
–0.3
20
DMD_VRESET
–18
7
RESET_Z, ACMPR_OUT
1
SPI_DOUT
5.5
RESET_Z, ACMPR_OUT
1
SPI_DOUT, INT_Z
Storage temperature
5.5
–65
150
UNIT
V
mA
mA
ºC
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended
Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
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6.2 ESD Ratings
VALUE
V(ESD) (1)
(1)
(2)
(3)
Electrostatic
discharge
Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins (2)
±2000
Charged device model (CDM), per JEDEC specification JESD22-C101, all pins (3)
±500
UNIT
V
Electrostatic discharge (ESD) to measure device sensitivity and immunity to damage caused by assembly line electrostatic discharges in
to the device.
JEDEC document JEP155 states that 500 V HBM allows safe manufacturing with a standard ESD control process.
JEDEC document JEP157 states that 250 V CDM allows safe manufacturing with a standard ESD control process.
6.3 Recommended Operating Conditions
Over operating free-air temperature range (unless otherwise noted).
MIN
MAX
16
20
CH1_SWITCH, CH2_SWITCH, CH3_SWITCH, ILLUM_A,B_FB,
–0.1
8.6
INT_Z, PROJ_ON
–0.1
6
PWR1_FB, PWR2_FB, PWR5_FB, PWR6_FB, PWR7_FB
–0.1
5
ACMPR_REF, CH_SEL_0, CH_SEL_01, SPI_CLK, SPI_MOSI,
SPI_SS_Z
–0.1
3.6
RLIM_BOT_K_1, RLIM_BOT_K_2
–0.1
0.1
ACMPR_IN_1, ACMPR_IN_2, ACMPR_IN_3, LABB_IN_LABB
–0.1
1.5
PWR_VIN, PWR1_VIN, PWR2_VIN, PWR3_VIN, PWR4_VIN,
PWR5_VIN, PWR6_VIN, PWR7_VIN, VINA, ILLUM_VIN,
ILLUM_A_VIN,ILLUM_B_VIN, DRST_VIN
Input voltage range
SPI_VIN
1.7
3.6
RLIM_K_1, RLIM_K_2
–0.1
0.25
ILLUM_A,B_COMP1, ILLUM_A,B_COMP2
–0.1
5.7
UNIT
V
Ambient temperature range
0
70
°C
Operating junction temperature
0
120
°C
6.4 Thermal Information
DLPA4000
THERMAL METRIC (1)
PFD (HTQFP)
UNIT
100 PINS
(2)
RθJA
Junction-to-ambient thermal resistance
RθJC(top)
Junction-to-case (top) thermal resistance
RθJB
Junction-to-board thermal resistance
ψJT
Junction-to-top characterization parameter
ψJB
Junction-to-board characterization parameter
RθJC(bot)
Junction-to-case (bottom) thermal resistance
(1)
(2)
(3)
(4)
(5)
8
(3)
(4)
(5)
7.0
°C/W
0.7
°C/W
N/A
°C/W
0.6
°C/W
3.4
°C/W
N/A
°C/W
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report, SPRA953.
The junction-to-ambient thermal resistance under natural convection is obtained in a simulation on a JEDEC-standard, high-K board, but
because the device is intended to be cooled with a heatsink from the top case of the package, the simulation includes a fan and
heatsink attached to the DLPA4000 device . The heatsink is a 22 mm × 22 mm × 12 mm aluminum pin fin heatsink with a 12 × 12 × 3
mm stud. Base thickness is 2 mm and pin diameter is 1.5 mm with an array of 6 × 6 pins. The heatsink is attached to the DLPA4000
device with 100 um thick thermal grease with 3 W/m-K thermal conductivity. The fan is 20 × 20 × 8 mm with 1.6 cfm open volume flow
rate and 0.22 in. water pressure at stagnation.
The junction-to-case (top) thermal resistance is obtained by simulating a cold plate test on the package top. No specific JEDEC standard
test exists, but a close description can be found in the ANSI SEMI standard G30-88.
The junction-to-top characterization parameter, ψJT, estimates the junction temperature of a device in a real system and is extracted
from the simulation data for obtaining RθJA, using a procedure described in JESD51-2a (sections 6 and 7), but modified to include the
fan and heatsink described in note 2.
The junction-to-board characterization parameter, ψJB, estimates the junction temperature of a device in a real system and is extracted
from the simulation data for obtaining RθJA, using a procedure described in JESD51-2a (sections 6 and 7), but modified to include the
fan and heatsink described in note 2.
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6.5 Electrical Characteristics
Over operating free-air temperature range. VIN = 19.5 V, TA = 0 to +40°C, typical values are at TA = 25°C, Configuration
according to Typical Application (VIN =19.5 V, IOUT = 32 A, LED, external MOSFETs ) (unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
16 (1)
19.5
20
V
18.4
V
SUPPLIES
INPUT VOLTAGE
VIN
VLOW_BAT
VUVLO
VSTARTUP
Input voltage range
VINA – pin
Low battery warning threshold
VINA falling (via 5 bit trim function, 0.5
V steps)
Hysteresis
VINA rising
UVLO threshold
VINA falling (via 5 bit trim function, 0.5
V steps)
Hysteresis
VINA rising
Startup voltage
DMD_VBIAS, DMD_VOFFSET,
DMD_VRESET loaded with 10 mA
3.9
90
3.9
mV
18.4
90
6
V
mV
V
INPUT CURRENT
IIDLE
Idle current
IDLE mode, all VIN pins combined
15
µA
ISTD
Standby current
STANDBY mode, analog, internal
supplies and LDOs enabled, DMD,
ILLUMINATION and BUCK
CONVERTERS disabled.
3.7
mA
IQ_DMD
Quiescent current (DMD)
Quiescent current DMD block (in
addtion to ISTD), VINA + DRST_VIN
0.49
mA
Quiescent current (ILLUM)
Quiescent current ILLUM block (in
addtion to ISTD), V_openloop= 3 V
(0x18, ILLUM_OLV_SEL), VINA +
ILLUM_VIN + ILLUM_A_VIN +
ILLUM_B_VIN
21
mA
Quiescent current per BUCK converter
(in addtion to ISTD), Normal mode, VINA
+ PWR_VIN + PWR1,2,5,6,7_VIN,
PWR1,2,5,6,7_VOUT = 1 V
4.3
Quiescent current per BUCK converter
(in addtion to ISTD), Normal mode, VINA
+ PWR_VIN + PWR1,2,5,6,7_VIN,
PWR1,2,5,6,7_VOUT = 5 V
15
IQ_ILLUM
IQ_BUCK
IQ_TOTAL
Quiescent current
(per BUCK)
Quiescent current (Total)
mA
Quiescent current per BUCK converter
(in addtion to ISTD), Cycle-skipping
mode, VINA + PWR_VIN +
PWR1,2,5,6,7_VIN = 1 V
0.41
Quiescent current per BUCK converter
(in addtion to ISTD), Cycle-skipping
mode, VINA + PWR_VIN +
PWR1,2,5,6,7_VIN = 5 V
0.46
Typical Application: ACTIVE mode, all
VIN pins combined, DMD,
ILLUMINATION and PWR1,2 enabled,
PWR3,4,5,6,7 disabled.
38
mA
5
V
2.5
V
INTERNAL SUPPLIES
VSUP_5P0V
Internal supply, analog
VSUP_2P5V
Internal supply, logic
DMD - LDO DMD
(1)
VIN must be higher than the UVLO voltage setting, including after accounting for AC noise on VIN, for the DLPA4000 device to fully
operate. While 15.5 V is the min VIN voltage supported, TI recommends that the UVLO is never set below 16 V. 16 V gives margin
above the minimum to protect against the case where someone suddenly removes VIN’s power supply which causes the VIN voltage to
drop rapidly. Failure to keep VIN above 16.0 V before the mirrors are parked and VOFS, VRST, and VBIAS supplies are properly shut
down can result in permanent damage to the DMD. Because 16 V is 500 mV above 15.5 V, when UVLO trips there is time for the
DLPA4000 device and DLPC343x to park the DMD mirrors and do a fast shut down of supplies VOFS, VRST, and VBIAS. Regardless
of the UVLO setting, , include enough bulk capacitance on VIN inside the projector to maintain VIN above 15.5 V for at least 100 µs
after VIN power supply is suddenly removed causing a UVLO fault.
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Electrical Characteristics (continued)
Over operating free-air temperature range. VIN = 19.5 V, TA = 0 to +40°C, typical values are at TA = 25°C, Configuration
according to Typical Application (VIN =19.5 V, IOUT = 32 A, LED, external MOSFETs ) (unless otherwise noted).
PARAMETER
TEST CONDITIONS
VDRST_VIN
MIN
TYP
MAX
6
12
20
VDRST_5P5V
5.5
PGOOD
Power good DRST_5P5V
OVP
Overvoltage protection
DRST_5P5V
Rising
80%
Faling
60%
At 25 mA, VDRST_VIN= 5.5 V
Regulator current limit (2)
V
56
300
340
V
V
7.2
Regulator dropout
UNIT
mV
400
mA
DMD - BUCK CONVERTERS
OUTPUT VOLTAGE
VPWR_1_VOUT
Output Voltage
VPWR_2_VOUT
Output Voltage
1.1
V
1.8
DC output voltage accuracy
IOUT= 0 mA
High side switch resistance
25°C, VPWR_1,2_Boost – VPWR1,2_SWITCH
= 5.5 V
–3%
V
3%
MOSFET
RON,H
RON,L
Low side switch resistance
(2)
25°C
150
mΩ
85
mΩ
LOAD CURRENT
Allowed Load Current.
Current limit (2)
IOCL
LOUT= 3.3 μH
3.2
3.6
3
A
4.2
A
ON-TIME TIMER CONTROL
tON
On time
VIN = 12 V, VO = 5 V
120
ns
tOFF(MIN)
Minimum off time (2)
TA = 25°C, VFB = 0 V
270
ns
START-UP
Soft start
1
2.5
4
ms
20
V
PGOOD
RatioOV
Overvoltage protection
RatioPG
Relative power good level
120%
Low to High
72%
ILLUMINATION - LDO ILLUM
VILLUM_VIN
6
VILLUM_5P5V
12
5.5
PGOOD
Power good ILLUM_5P5V
OVP
Overvoltage protection
ILLUM_5P5V
Regulator dropout
Rising
80%
Falling
60%
V
7.2
At 25 mA, VILLUM_VIN = 5.5 V
Regulator current limit (2)
V
53
mV
300
340
400
mA
6
12
20
V
ILLUMINATION - DRIVER A,B
VILLUM_A,B_IN
Input supply voltage range
PWM
ƒSW
Oscillator frequency
tDEAD
Output driver dead time
3 V < VIN < 20 V
600
HDRV off to LDRV on, TRDLY = 0
28
HDRV off to LDRV on, TRDLY = 1
40
LDRV off to HDRV on, TRDLY = 0
35
kHz
ns
OUTPUT DRIVERS
(2)
10
Not production tested.
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Electrical Characteristics (continued)
Over operating free-air temperature range. VIN = 19.5 V, TA = 0 to +40°C, typical values are at TA = 25°C, Configuration
according to Typical Application (VIN =19.5 V, IOUT = 32 A, LED, external MOSFETs ) (unless otherwise noted).
PARAMETER
TEST CONDITIONS
RHDHI
VILLUM_A,B_BOOT – VILLUM_A,B_SW = 5 V,
High-side driver pull-up resistance
IHDRV = –100 mA
RHDLO
High-side driver pull-down
resistance
VILLUM_A,B_BOOT – VILLUM_A,B_SW = 5 V,
IHDRV = 100 mA
RLDHI
Low-side driver pull-up resistance
RLDLO
tHRISE
MIN
TYP
MAX
UNIT
4.9
Ω
3
Ω
ILDRV = –100 mA
3.1
Ω
Low-side driver pull-down
resistance
ILDRV = 100 mA
2.4
Ω
High-side driver rise time (2)
CLOAD = 5 nF
23
ns
tHFALL
High-side driver fall time
(2)
CLOAD = 5 nF
19
ns
tLRISE
Low-side driver rise time (2)
CLOAD = 5 nF
23
ns
tLFALL
Low-side driver fall time (2)
CLOAD = 5 nF
17
ns
OVERCURRENT PROTECTION
HSD OC
High-Side Drive Over Current
threshold
External switches, VDS threshold (2).
185
mV
Bootstrap diode forward voltage
IBOOT = 5 mA
0.75
V
BOOT DIODE
VDFWD
PGOOD
RatioUV
Undervoltage protection
89%
INTERNAL RGB STROBE CONTROLLER SWITCHES
RON
ON-resistance
CH1,2,3_SWITCH
ILEAK
OFF-state leakage current
VDS= 5.0 V
IMAX
Maximum current
30
45
mΩ
0.1
µA
6
A
DRIVERS EXTERNAL RGB STROBE CONTROLLER SWITCHES
CHx_GATE_C
NTR_HIGH
CHx_GATE_C
NTR_LOW
Gate control high level
Gate control low level
ILLUM_SW_ILIM_EN[2:0] = 7, register
0x02, ISINK= 400 µA
4.35
ILLUM_SW_ILIM_EN[2:0] = 0, register
0x02, ISINK= 400 µA
5.25
ILLUM_SW_ILIM_EN[2:0] = 7, register
0x02, ISINK= 400 µA
55
ILLUM_SW_ILIM_EN[2:0] = 0, register
0x02, ISINK= 400 µA
55
V
mV
LED CURRENT CONTROL
VLED_ANODE
ILED
LED Anode voltage (2)
LED currents
VILLUM_A,B_VIN ≥ 8 V. See register
SWx_IDAC[9:0] for settings.
DC current offset,
CH1,2,3_SWITCH
RLIM = 4 mΩ
Transient LED current limit range
(programmable)
tRISE
Ratio with respect to VILLUM_A,B_VIN
(Duty cycle limitation).
Current rise time
0.85x
1
–150
0
20% higher than ILED. Min-setting,
RLIM= 4 mΩ.
11%
20% higher than ILED. Max-setting,
RLIM= 4 mΩ. Percentage of max
current.
133%
ILED from 5% to 95%, ILED = 600 mA,
transient current limit disabled (2).
8.6
V
32
A
150
mA
50
µs
20
V
BUCK CONVERTERS - LDO_BUCKS
VPWR_VIN
Input voltage range
PWR1,2,5,6,7_VIN
VPWR_5P5V
PWR_5P5V
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16
19.5
5.5
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Electrical Characteristics (continued)
Over operating free-air temperature range. VIN = 19.5 V, TA = 0 to +40°C, typical values are at TA = 25°C, Configuration
according to Typical Application (VIN =19.5 V, IOUT = 32 A, LED, external MOSFETs ) (unless otherwise noted).
PARAMETER
TEST CONDITIONS
PGOOD
Power good PWR_5P5V
OVP
Overvoltage Protection
PWR_5P5V
Regulator dropout
MIN
TYP
Rising
80%
Falling
60%
MAX
7.2
At 25 mA, VPWR_VIN= 5.5 V
Regulator current limit (2)
V
41
300
BUCK CONVERTERS - GENERAL PURPOSE BUCK CONVERTERS
340
UNIT
mV
400
mA
(3)
OUTPUT VOLTAGE
VPWR_5,6,7_VOU
Output Voltage (General Purpose
Buck1,2,3)
8-bit programmable
DC output voltage accuracy
IOUT= 0 mA
RON,H
High-side switch resistance
25°C, VPWR5,6,7_Boost – VPWR5,6,7_SWITCH
= 5.5 V
RON,L
Low-side switch resistance (2)
25°C
T
1
5
–3.5%
3.5%
V
MOSFET
150
mΩ
85
mΩ
2
A
LOAD
CURRENT
Allowed load current PWR6.
Allowed load current PWR5,
PWR7.
IOCL
Current limit
(2)
Buck converters should not be used.
LOUT= 3.3 μH
A
3.2
3.6
4.2
A
ON-TIME
TIMER
CONTROL
tON
On time
tOFF(min)
Minimum off time
(2)
VIN = 12 V, VO = 5 V
120
ns
TA = 25°C, VFB = 0 V
270
310
ns
2.5
4
ms
20
V
START-UP
tSS
Soft-start period
1
PGOOD
RatioOV
Overvoltage protection
RatioPG
Relative power good level
120%
Low to High
72%
AUXILIARY LDOs
VPWR3,4_VIN
Input voltage range
LDO1 (PWR4), LDO2 (PWR3)
PGOOD
Power good PWR3_VOUT,
PWR4_VOUT
3.3
PWR3_VOUT and PWR4_VOUT rising
80%
PWR3_VOUT and PWR4_VOUT falling
60%
Overvoltage Protection
PWR3_VOUT, PWR4_VOUT
OVP
DC output voltage accuracy
PWR3_VOUT, PWR4_VOUT
7
IOUT= 0 mA
Regulator current limit (2)
tON
Turn-on time
12
–3%
300
to 80% of VOUT = PWR3 and PWR4, C
= 1 µF
V
3%
340
40
400
mA
µs
LDO2 (PWR3)
VPWR3_VOUT
(3)
12
Output Voltage PWR3_VOUT
2.5
V
Load Current capability
200
mA
DC Load regulation PWR3_VOUT VOUT= 2.5 V, 5 ≤ IOUT ≤ 200 mA
–70
mV/A
General Purpose Buck2 (PWR6) currently supported, others may be available in the future.
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Electrical Characteristics (continued)
Over operating free-air temperature range. VIN = 19.5 V, TA = 0 to +40°C, typical values are at TA = 25°C, Configuration
according to Typical Application (VIN =19.5 V, IOUT = 32 A, LED, external MOSFETs ) (unless otherwise noted).
PARAMETER
DC Line regulation PWR3_VOUT
TEST CONDITIONS
MIN
VOUT= 2.5 V, IOUT= 5 mA, 3.3 ≤
PWR3_VIN ≤ 20 V
TYP
MAX
UNIT
30
µV/V
Output Voltage PWR4_VOUT
3.3
V
Load Current capability
200
mA
DC Load regulation PWR4_VOUT VOUT= 3.3 V, 5 ≤ IOUT ≤ 200 mA
–70
mV/A
LDO1 (PWR4)
VPWR4_VOUT
DC Line regulation PWR4_VOUT
VOUT= 3.3 V, IOUT= 5 mA, 4 ≤
PWR4_VIN ≤ 20 V
30
µV/V
Regulator dropout
IOUT = 25 mA, VOUT= 3.3 V, VPWR4_VIN=
3.3 V
48
mV
MEASUREMENT SYSTEM
AFE
G
Amplifier gain (PGA)
VOFS
Input referred offset voltage
τRC
Settling time
VACMPR_IN_1,2,3
Input voltage Range
ACMPR_IN_1,2,3
AFE_GAIN[1:0] = 01
1
AFE_GAIN[1:0] = 10
9.5
AFE_GAIN[1:0] = 11
18
PGA, AFE_CAL_DIS = 1 (2)
Comparator (2)
–1
1
–1.5
+1.5
To 1% of final value (2).
To 0.1% of final value
V/V
(2)
.
46
67
69
100
0
1.5
mV
µs
V
LABB
To 1% of final value (2).
τRC
Settling time
VACMPR_IN_LABB
Input voltage range
ACMPR_IN_LABB
To 0.1% of final value (2).
Sampling window
ACMPR_IN_LABB
Programmable per 7 µs
4.6
6.6
7
10
µs
0
1.5
V
7
28
µs
COLOR WHEEL PWM
CLK_OUT
Clock output frequency
VCW_SPEED_PW
M_OUT
Voltage range
CW_SPEED_PWM_OUT
VSPI
SPI supply voltage range
2.25
Average value programmable in 16 bits
0
MHz
5
V
V
DIGITAL CONTROL - LOGIC LEVELS AND TIMING CHARACTERISTICS
VOL
VOH
Output low-level
Output high-level
SPI_VIN
1.7
3.6
RESETZ, CMP_OUT, CLK_OUT. IO =
0.3 mA sink current
0
0.3
SPI_DOUT. IO = 5 mA sink current
0
0.3 ×
VSPI
INTZ. IO = 1.5 mA sink current
0
0.3 ×
VSPI
RESETZ, CMP_OUT, CLK_OUT. IO =
0.3 mA source current
1.3
2.5
SPI_DOUT. IO = 5 mA source current
0.7 ×
VSPI
VSPI
PROJ_ON, LED_SEL0, LED_SEL1
VIL
Input low-level
VIH
Input high-level
SPI_CSZ, SPI_CLK, SPI_DIN
PROJ_ON, LED_SEL0, LED_SEL1
Copyright © 2018, Texas Instruments Incorporated
SPI_CSZ, SPI_CLK, SPI_DIN
V
V
0
0.4
0
0.3 ×
VSPI
V
1.2
0.7 ×
VSPI
VSPI
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Electrical Characteristics (continued)
Over operating free-air temperature range. VIN = 19.5 V, TA = 0 to +40°C, typical values are at TA = 25°C, Configuration
according to Typical Application (VIN =19.5 V, IOUT = 32 A, LED, external MOSFETs ) (unless otherwise noted).
PARAMETER
IBIAS
SPI_CLK
TEST CONDITIONS
Input bias current
VIO= 3.3 V, any digital input pin
SPI clock frequency (4)
Normal SPI mode,
DIG_SPI_FAST_SEL = 0, ƒOSC = 9
MHz
Fast SPI mode, DIG_SPI_FAST_SEL =
1, VSPI> 2.3 V, ƒOSC = 9 MHz
tDEGLITCH
Deglitch time
LED_SEL0, LED_SEL1
MIN
TYP
MAX
0.1
0
UNIT
µA
36
MHz
20
(2)
.
40
300
ns
INTERNAL OSCILLATOR
ƒOSC
Oscillator frequency
Frequency accuracy
9
TA= 0 to 70°C
–5%
MHz
5%
THERMAL SHUTDOWN
Thermal warning (HOT threshold)
TWARN
120
Hysteresis
TSHTDWN
Thermal shutdown (TSD
threshold)
150
Hysteresis
(4)
°C
10
°C
15
Maximum depends linearly on oscillator frequency fOSC.
6.6 SPI Timing Parameters
SPI_VIN = 3.6 V ± 5%, TA = 0 to 40ºC, CL = 10 pF (unless otherwise noted).
MIN
NOM
UNIT
40
MHz
fCLK
Serial clock frequency
tCLKL
Pulse width low, SPI_CLK, 50% level
10
ns
tCLKH
Pulse width high, SPI_CLK, 50% level
10
ns
tt
Transition time, 20% to 80% level, all signals
0.2
tCSCR
SPI_SS_Z falling to SPI_CLK rising, 50% level
tCFCS
SPI_CLK falling to SPI_CSZ rising, 50% level
tCDS
SPI_MOSI data setup time, 50% level
7
ns
tCDH
SPI_MOSI data hold time, 50% level
6
ns
tiS
SPI_MISO data setup time, 50% level
10
ns
tiH
SPI_MISO data hold time, 50% level
0
ns
tCFDO
SPI_CLK falling to SPI_MISO data valid, 50% level
tCSZ
SPI_CSZ rising to SPI_MISO HiZ
14
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MAX
4
8
ns
ns
1
ns
13
ns
6
ns
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7 Detailed Description
7.1 Overview
The DLPA4000 device is a highly integrated power management driver optimized for DLP 1500 to 3000 lumen
LED projectors . It targets accessory applications up to several hundreds of lumen and is designed to support a
wide variety of high-current LEDs. Functional Block Description shows a typical DLP high-side pumped LED
1500-3000 lumen projector implementation.
Part of the projector is the projector module, which is an optimized combination of components consisting of, for
instance, LEDs, DMD, control chip, memory, and optional sensors and fans. The front-end chip controls the
projector module. More information about the system and projector module configuration can be found in a
separate application note.
The device blocks are listed below and discussed in detail in this data sheet:
• Supply and Monitoring: Creates internal supply and reference voltages and has functions such as thermal
protection
• Illumination: Block to control the light. Contains drivers, strobe decoder for the LEDs and power conversion
• External Power FETs: Capable for 32 A and High-Side Pump
• DMD Supply: Generates voltages and their specific timing for the DMD. Contains regulators and DMD/DLPC
buck converters
• Buck Converter: General purpose buck converter
• Auxiliary LDOs: Fixed voltage LDOs for customer usage
• Measurement System: Analog front end to measure internal and external signals
• Programming: SPI interface, digital control
7.2 Functional Block Description
12- V Regulator
16 V to 20 V DC
Power Supplies
and Monitoring
HDMI
VGA
PROJ_ON
SPI
PWR_GOOD
PWR_ON
Front
End
Keypad
I2C
Shunt Diodes
Digital Control Block
DLPA4000
DATA
Flash
Illumination
Control
1.1 V
1.8 V
DLPC4422
DMD and
Controller Bucks
3.3 V
2.5 V
LDOs
3.3 V
GP Buck
Converter
External
High-Side Pump LED
Power
FETs
DMD
Reset
Voltage
Generator
Measurement
System
DMD Reset
Voltages and Control
Sensors
DLP650NE
DMD Data and Control
Copyright © 2018, Texas Instruments Incorporated
or
DLPA200
DLP650LE
Control
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7.3 Feature Description
7.3.1 Supply and Monitoring
This block generates internal supply voltages and monitors device behavior.
7.3.1.1 Supply
The specified input supply voltage for main supply (VIN) is between 16 V and 20 V. The typical specification is
19.5 V. When the device energizes, several internal power supplies become energized sequentially.(Figure 1). A
sequential startup ensures that all the different blocks start in a certain order and prevent excessive startup
currents. The main control to start the device is the control pin PROJ_ON. Once set high the basic analog
circuitry is started that is needed to operate the digital and SPI interface. This circuitry is supplied by two LDO
regulators that generate 2.5 V (SUP_2P5V) and 5 V (SUP_5P0V). These regulator voltages internal only. Do not
load these regulator voltages externally. Make sure the output capacitance is 2.2 µF for the 2.5-V LDO (pin 91)
and 4.7 µF for the 5-V LDO, (pin 92). After the LDO voltages reach the regulator levels, the digital core starts,
and the Digital State Machine (DSM) controls the device.
Subsequently, the 5.5-V LDOs for various blocks start: PWR_5V5V, DRST_5P5V and ILLUM_5P5V. Then the
DLPC buck converters (PWR_1 & PWR_2) start and followed by the DMD LDOs (PWR_3 & PWR_4).The device
enables and is controllable by the DLPC (indicated by RESET_Z going high). At this point the general purpose
buck converter (PWR_6) can start. Lastly the regulator that supplies the DMD starts. The DMD regulator
generates the timing critical VOFFSET, VBIAS, and VRESET supplies.
16
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Feature Description (continued)
VIN
Note:
Arrows indicate sequence of events automatically controlled by digital state machine. Other events are initiated under
SPI control.
Figure 1. Powerup Timing
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Feature Description (continued)
7.3.1.2 Monitoring
The DLPA4000 device monitors and reports faults occurrence and fault type. Register 0x0C stores the fault type
.The device generates an interrupt signal whenever a fault occurs. The user can configure fault conditions in
0x0D.
7.3.1.2.1 Block Faults
The device can detect fault conditions for supplies such as the low voltage supplies (SUPPLY_FAULT).
ILLUM_FAULT monitors correct supply and voltage levels in the illumination block. DMD_FAULT monitors a
correctly functioning DMD block. The PROJ_ON_INT bit indicates when PROJ_ON asserts.
7.3.1.2.2 Low Battery and UVLO
The low voltage warning signal (BAT_LOW_WARN) and voltage low shutdown (BAT_LOW_SHUT) signal
monitor the input voltage (VIN) (see Figure 2). These signals warn for a low VIN supply voltage or automatically
shutdown the device when the VIN supply drops below a predefined level. The threshold levels for these fault
conditions can be set from 3.9 V to 18.4 V by writing to registers 0x10<4:0> (LOWBATT) and 0x11<4:0>
(BAT_LOW_SHUT_UVLO). Figure 3 shows the threshold level hysteresis and its dependence on the selected
threshold voltage. Set the low voltage higher than the undervoltage lockout threshold to generate a warning
before the device shuts down.
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Figure 2. Voltage Monitoring
0.14
0.12
HYSTERESIS (V)
0.1
0.08
0.06
0.04
0.02
0
4
6
8
10
12
14
TRIM SETTING (V)
16
18
20
D002
Figure 3. Hysteresis on VLOW_BAT and VUVLO
18
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Feature Description (continued)
7.3.1.2.3 Thermal Protection
The device constantly monitors the chip temperature to prevent overheating. There are two levels of fault
condition for register 0x0C. The first level is an overheat warning (TS_WARN). The overheat warning indicates
when the chip reaches a critically high temperature. The second level (TS_SHUT) indicates when the chip
reaches a higher temperature than the TS_WARN level. The device shuts down the device to prevent permanent
damage when it reaches the TS_SHUT level. Both temperature faults have hysteresis levels to prevent rapid
switching when the temperature is near the threshold.
7.3.2 Illumination
The illumination function includes all blocks needed to generate light for the DLP system. The device uses a
control loop to accurately set the current through the LEDs (see Figure 4). Use IDAC[9:0] to set the intended
LED current. The Illumination driver controls the LED anode voltage VLED and as a result a current flows through
one of the LEDs. The voltage across the sense resistor (RLIM) measures the LED current. Based on the
difference between the actual and intended current, the loop controls the output of the buck converter (VLED)
higher or lower. Switches P, Q, and R control the LED which conducts the current. The Openloop feedback
circuitry" confirms that the control loop can be closed for cases when there is no path via the LED (for instance,
when ILED= 0 A).
VIN
ILLUMINATION
DRIVER
A (B)
>
100n
25V
D
LDO
ILLUM
LOUT
COUT
VLED
“Openloop”
feedback
circuitry
W
Z'
^dZK
KZ
Y
Z
SHUNT
GPIO (From
Controller)
RLIM
IDAC[0:9]
Figure 4. Illumination Control Loop
These blocks comprise the illumination control loop.
• Programmable gain block
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Feature Description (continued)
•
•
•
LDO illum, analog supply voltage for internal illumination blocks
Illumination driver A, primary driver for the external FETs
RGB strobe decoder, driver for external switches to control the on-off rhythm of the LEDs and measures the
LED current
7.3.2.1 Programmable Gain Block
IDAC registers 0x03h to 0x08h determine the current through the LEDs, which is measured through the sense
resistor RLIM. The device compares the voltage across RLIM with the current setting from the IDAC registers. The
loop regulates the current to the set value.
Gain
ILLUMINATION
Buck Converter
LOUT
VLED
rLED
COUT
RWIRE
RON
VRLIM
RLIM
Figure 5. Programmable Gain Block in the Illumination Control Loop
When current flows through an LED, a forward voltage builds up across the LED. The LED acts as a (low)
differential resistance that is part of the load circuit for VLED. Together with the wire resistance (RWIRE) and the
on-resistance (RON) of the MOSFET switch, the device creates a voltage divider with the RLIM resistor that is a
factor in the loop gain of the ILED control. During normal conditions, the loop produces a well-regulated LED
current up to 32 A.
Because this voltage divider is a component of the control loop, make sure to consider issues such as resistance
and attenuation. For instance, when the application includes two LEDs connected in series, or when the
application has relatively high wiring resistance, the loop gain reduces due to the extra attenuation caused by the
increased series resistance of rLED + RWIRE +RON. As a result, the loop response time lowers. To compensate for
this increased attenuation, increase the loop gain by selecting a higher gain for the programmable gain block.
Use register 0x25h [3:0] to set the gain increase.
During normal operation the default gain setting (00h) suffices. In case of two LEDs connected in series a gain
setting 01h or 02h suffices.
Wiring resistance also impacts the control-loop performance. Avoid unnecessary large wire length in the loop.
Maintain a wiring resistance as low as possible to yield the highest efficiency. When wiring resistance continues
to impact the response time of the loop, select an appropriate setting of the gain block. Also be aware of
connector resistance and PCB tracks. Every milli-ohm of resistance counts.
7.3.2.2 LDO Illumination
A dedicated regulator to the illumination block provides an analog power supply of 5.5 V to the internal circuitry.
Add a 1-µF capacitor to the input of the LDO and to the output of the LDO.
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Feature Description (continued)
7.3.2.3 Illumination Driver A
The illumination driver of the DLPA4000 comprises a buck controller for driving two external low-ohmic Nchannel MOSFETs Figure 6). The application note Understanding Buck Power Stages in Switchmode Power
Supplies (SLVA057) explains buck converter operation theory. Proper operation requires careful selection of the
external components, especially the inductor LOUT and the output capacitor COUT. For best efficiency and ripple
performance, choose an inductor and capacitor with low equivalent series resistance (ESR).
29
30
ILLUM_A_FB
ILLUM_A_VIN
ILLUM_A_BOOST
28
L
0.47 µF
50 V
3x10 µF
50 V
ILLUM_HSIDE_DRIVE
3Ω
VIN
0.47 µF/50 V
3x10 µF/50 V
3.9 Ω
0.1 uF
25 V
26
ILLUMINATION
DRIVER
A
31
M
ILLUM_A_SW
1000 pF
50 V
ILLUM_LSIDE_DRIVE
2700 pF
50 V
2Ω
27
32
ILLUM_A_PGND
2xB240A-13-F
2x
VLED
38
ILLUM_A_COMP2
CSD87350Q5D
2xB0540WS-7
ILLUM_A_COMP1
39
2200 pF
50 V
15 pF
50V
6x22 µF
25 V
1 µH
32 A
3300 pF
50 V
1.3 Ω
0.4 W
Figure 6. Typical Illumination Driver Configuration
Several factors determine the component selection of the buck converter, including input voltage (VIN), desired
output voltage (VLED) and the allowed output current ripple. The first step of the configuration is to select the
inductor LOUT.
Select the value of the inductance of a buck power stage so that the peak-to-peak ripple current flowing in the
inductor remains within a certain range. Here, the target is set to have an inductor current ripple, kI_RIPPLE, less
than 0.174 (17.4%). The minimum inductor value can be calculated given the input and output voltage, output
current, switching frequency of the buck converter (ƒSWITCH= 600 kHz), and inductor ripple of 0.174 (17.4%):
L OUT
VOUT
˜ ( VIN VOUT )
VIN
k I _ RIPPLE ˜ IOUT ˜ fSWITCH
(1)
Example: VIN= 19.5 V, VOUT= 4.3 V, IOUT= 32 A results in an inductor value of LOUT= 1µH
Determine the output capacitor, COUT after selecting the inductor. Calculate the value considering that the
frequency compensation of the illumination loop is designed for an LC-tank resonance frequency of 13.8 kHz:
f RES =
1
2 ⋅ π ⋅ LOUT ⋅ C OUT
(2)
Example: COUT= 132 µF given that LOUT= 1 µH. A practical value is 6 × 22 µF. Here, a parallel connection of two
capacitors is chosen to lower the ESR even further.
The selected inductor and capacitor determine the output voltage ripple. The resulting output voltage ripple
VLED_RIPPLE is a function of the inductor ripple kI_RIPPLE, output current IOUT, switching frequency ƒSWITCH and the
capacitor value COUT:
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Feature Description (continued)
VLED _ RIPPLE
k I _ RIPPLE ˜ IOUT
8 ˜ fSWITCH ˜ COUT
(3)
Example: KI_RIPPLE= 0.174, IOUT= 32 A, ƒSWITCH= 600 kHz and COUT= 6 x 22 µF results with an appropriately
small level of 8.8 mVpp.
It is strongly advised to keep the capacitance value low. The larger the capacitor value the more energy is
stored. When the LED voltage falls, stored energy must dissipate. Current discharges when stored energy
dissipates. Use Equation 4 to calculate the theoretical peak reverse current caused by a large voltage drop.
COUT
I2:max ; = ¨
× ::V1 ;2 F :V2 ;2 ; + :I1 ;2
LOUT
where
•
•
•
V1 is the starting VLED
V2 is the ending VLED
I1 is the LED current
(4)
7.3.2.4 External MOSFETs
Depending on the type of external MOSFETs selected, consider adding any or all of the components described
in this section. TI recommends the user include placeholders for these components in the board design.
7.3.2.4.1 Gate series resistor (RG)
Use gate series resistors to slow the turn-on transient of the power FET, if needed. Because the device switches
large currents, a fast turn-on transient time potentially risks switch-node ringing. Slowing down the turn-on
transient time reduces the edge steepness of the drain current waveform, The reduction of the edge steepness
results in a reduction of the induced inductive ringing. A resistance of a few Ohms typically suffices.
7.3.2.4.2 Gate series diode (DG)
The turn-off transient time of the power FET includes gate series resistance also. This resistance potentially
affects on the non-overlap timing negatively. In order to maintain a fast turn-off transient time for the power FET,
use a diode in parallel with the gate series resistance. The cathode of the diode shunts the current at the gate
series resistor which results in a fast turn-off transient time. to the DLPA4000 device which results in a fast turnoff transient time.
7.3.2.4.3 Gate parallel capacitance (CG)
Use gate parallel capacitance specifically for higher supply voltages. The gate of a disabled power MOSFET can
be pulled high parasitically due to a large drain voltage swing and the drain-gate capacitance,
In the low-side MOSFET this voltage swing can happen at the end of the non-overlap time while the power
converter supplies current. In this case the switch node is low at the end of the non-overlap time. The switch
node pulls high when the high-side MOSFET starts. Due to the large and steep waveform edge of the switch
node current, the drain-gate capacitance of the low-side MOSFET injects the charge into the gate of the low-side
FET. This situation causes the low-side MOSFET to operate for a short period of time causing a shoot-through
current.
A similar situation exists with high-side FET. While the power converter discharges the LED voltage (VLED) the
device directs the power converter current inward. At the end of the non-overlap time the switch node is high. If
at that moment the low-side MOSFET is enabled, via the gate-drain capacitance of the high-side MOSFET
charge is being injected into the gate of the high-side MOSFET potentially causing the device to switch on for a
short amount of time. That switch-on behavior causes a shoot through current as well.
Add more gate-source filter capacitance to reduce the effect of the charge injection via the drain-source
capacitance. In the case where a linear voltage division exists between gate-source capacitance and gate-drain
capacitance, and for a 20-V supply voltage, maintain a ratio of gate-source capacitance and gate-drain
capacitance to approximately 1:10 or larger. Make sure to test the gate-drive signals and the switch node for
potential cross conduction.
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Feature Description (continued)
Sometimes a design can include dual MOSFETs to dissipate power (heat). Consider the configurations shown in
Figure 7 tp prevent parasitic gate-oscillation a structure. In this example, the device isolates each gate with a
resistor (RISO) to dampen potential oscillations. A resistance of 1 Ω is typically sufficient.
DG
RISO
RG
RISO
CG
Figure 7. Using RISO to Prevent Gate Oscillations When Using Power MOSFETs in Parallel
A buck converter design requires at least two capacitors. Make sure that the value of the input-capacitor pin
(ILLUM_A_VIN) is equal or greater than the selected output capacitance COUT, in this case ≥ 2 × 68 µF.
7.3.2.5 RGB Strobe Decoder
The DLPA4000 can sequentially control the three color-LEDs (red, green and blue). This circuitry consists of
three drivers to control external switches, the actual strobe decoder and the LED current control (Figure 8). The
N-channel MOSFET switches are connected to the cathode terminals of the external LED package. These
switches start and stop the currents through the LEDs.
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Feature Description (continued)
From ILLUM_A_FB
(VLED)
From LDO_ILLUM
19
20
2
OSRAM P2 LEDs
CH1_GATE_CTRL
VLED
CH2_GATE_CTRL
CH3_GATE_CTRL
9 CH1_SWITCH
10
17 CH2_SWITCH
18
24 CH3_SWITCH
25
RGB
STROBE
DECODER
4x ESDA18-1k
P
Q
4x CSD17556Q5B
R
11 RLIM_1
16
22 RLIM_2
23
15
14
13
12
60
61
SHUNT GPIO
4.7 nF
50V
RLIM_K_1
(From
Controller)
100 Ω
RLIM_BOT_K_1
4 mΩ
5W
RLIM_K_2
RLIM_BOT_K_2
CH_SEL_0
CH_SEL_1
From host
From host
Figure 8. Switch Connection for a Common-Anode LED Assembly
The CH_SEL_0 and CH_SEL_1 pins control the N-channel MOSFET P, Q, and R signals. The CH_SEL[1:0]
registers typically receive a rotating code switching from RED to GREEN to BLUE and then back to RED.
Table 1 lists the relationship between CH_SEL[0:1] and the switch positions.
Table 1. Switch Positions for Common Anode RGB LEDs
SWITCH
PINS CH_SEL[1:0
IDAC REGISTER
P
Q
R
00
Open
Open
Open
N/A
01
Closed
Open
Open
0x03 and 0x04 SW1_IDAC[9:0]
10
Open
Closed
Open
0x05 and 0x06 SW2_IDAC[9:0]
11
Open
Open
Closed
0x07 and 0x08 SW3_IDAC[9:0]
CH_SEL[1:0] functions to start one of the switches, CH_SEL[1:0] but it also selects a 10-bit current setting for the
control IDAC that is used as the set current for the LED. The device uses this set current in addition to the
measured current through RLIM to control the illumination driver to the appropriate VLED. Registers 0x03 to 0x08
(Table 1). independently set the current through the three LEDs.
Each current level can be set from off to 150mV/RLIM in 1023 steps:
ILED A =
24
Bit Value + 1 150 mV
×
1024
R LIM
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The maximum current for RLIMis 4.7 mΩ, so the ILEDA is 32 A. However, the reference design includes a more
common 4-mΩ value with a less than maximum IDAC value for 32 A.
The device requires a minimum LED current of 5% of ILED_MAX to operate correctly.
7.3.2.5.1 Break Before Make (BBM)
The operation of the three LED N-channel MOSFET switches (P, Q, R) follows a break-before-make control. The
device returns a switch to the OPEN position first before the device sets the subsequent switch to the CLOSED
position (BBM), Figure 9. The BBM register (0x0E) controls the dead-time between closing one swtich and
opening another. Switches that are intended to remain closed do not opened during the BBM delay time.
ILED
BBM dead time (0x0E)
P
Q
R
P
Figure 9. Break-Before-Make Timing
7.3.2.5.2 Openloop Voltage
in some case, there is no control loop for the buck converter through the LED. To prevent the output voltage of
the buck converter to vary inconsistently, use an internal resistive divider to close the loop is closed as shown in
Figure 4. Open loop voltage control is active:
• during the BBM period. Transitions from one LED to another implies that during the BBM time all LEDs are
off.
• when the current setting for all three LEDs is 0.
It’s important to set the open loop voltage to approximately equal the lowest LED forward voltage. Use register
0x18 to set the open loop voltage between 3 V and 18 V in steps of 1 V.
7.3.2.5.3 Transient Current Limit
Typically the forward voltages of the green diodes and the blue diodes are equivalent to each other (between 3 V
and 5 V). However the forward voltage of the red diode is significantly lower (2 V to 4 V). This difference can lead
to a current spike in the RED diode when the strobe controller switches from green or blue to red. The spike
occurs because the LED voltage (VLED) is initially higher than required to drive the red diode. DLPA4000 limits
the transient current for each switch in the LEDs during the transition. Use register 0x02 (ILLUM_ILIM) to control
the transient current limit. A typical application requires this limit for only for the RED diode. Set the value for
ILLUM_ILIM to at least 20% higher than the DC regulation current. Use the three bits of register 0x02
(ILLUM_SW_ILIM_EN) to select which switch controls the transient current limiting feature. Figure 10 and
Figure 11 show the effect of the transient current limit on the LED current.
For high-side pump applications, where there are two series stacked LEDs for green, sequence precautions are
needed to avoid damaging the LEDS. Always transition from high-side pump green to blue, avoid following the
green with red.
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Red LED Current (mA)
Red LED Current (mA)
DLPS132 – MAY 2018
Current
overshoot
SW_IDAC
Time
Figure 10. LED Current Without Transient Current
Limit
Transient
current
limit
active
ILLUM_ILIM
SW_IDAC
Time
Figure 11. LED Current With Transient Current
Limit
7.3.2.6 Illumination Monitoring
The device continuously monitors the illumination block for system failures to prevent damage to the system and
the LEDs. The device protects from a broken control loop and a too high or too low output voltage VLED. Register
0x0C (ILLUM_FAULT) controls the overall illumination fault bit. If the device report either
ILLUM_BC1_PG_FAULT (powergood) or ILLUM_BC1_OV_FAULT (overvoltage), make sure the ILLUM_FAULT
bit is not set too high:
7.3.2.6.1 Power Good
Both the Illumination driver and the Illumination LDO have a power good indication. The power good for the
driver indicates if the output voltage (VLED) is within a defined window indicating that the LED current has
reached the set point. If for some reason the LED current cannot be controlled to the intended value, this fault
occurs. Subsequently, the device sets bit ILLUM_BC1_PG_FAULT in register 0x27 to high. When the device
energizes the power good of the LDO, it indicates that the LDO voltage is below a pre-defined minimum of 80%
(for the rising edge) or 60% (for the falling edge). Register 0x27 stores the power good indication for the LDO
(V5V5_LDO_ILLUM_PG_FAULT).
7.3.2.6.2 RatioMetric Overvoltage Protection
The DLPA4000 device protects the illumination driver LED outputs against open circuit use. When no LED is
connected and the device receives a signal to set the LED current to a specific level, the LED voltage
(ILLUM_A_FB) quickly rises and potentially saturates to VIN. The device triggers OVP protection circuit when
VLED crosses the specified threshold to prevent this dangerous situation. The OVP protection fault disables the
DLPA4000 device.
The device triggers a fault when the supply voltage (VINA) falls too low. A comparator senses both the LED
voltage and the VINA supply voltage The fraction of the VINA is connected to the minus input of the comparator
while the fraction of the VLED voltage is connected to the plus input. The OVP fault occurs when the plus input
rises above the minus input. Set the fraction of the VINA between 1 V and 4 V to ensure proper operation of the
comparator.
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ILLUM_A_FB
(VLED)
Settings:
reg 0x19h [4:0]
VLED / VLED_RATIO
VINA
Settings:
reg 0x0Bh [4:0]
+
OVP_trigger
VINA / VINA_RATIO
1V< VIN- <4V
Figure 12. Ratio Metric OVP
Use register 0x19h bits [4:0] to set the fraction of the ILLUM_A_FB voltage. Use register 0x0Bh bits [4:0] to set
the fraction of the VINA voltage. In general the device issues an OVP fault when either Equation 6 or Equation 6
occurs.
VLED
VLED RATIO
R
VINA
VINA RATIO
VLED R VINA ×
õ VLED R VINA ×
VLED RATIO
VINA RATIO
(6)
VLED RATIO
4.98
R VINA ×
= 0.85 × VINA
VINA RATIO
5.85
(7)
Because the OVP level is ratio-metric it can be set to a fixed fraction of VINA.
For example: to maintain a VLED level below 85% of VINA, use these settings:
reg 0x19h [4:0] = 01h (4.98)
reg 0x0Bh [4:0] = 07h (5.85)
Additionally for VIN_RATIO = 5.85 the VIN– input voltage for the comparator is between 1 V and 3.4 V for a supply
voltage between 6 V and 20 V.
7.3.3 External Power MOSFET Selection
The DLPA4000 requires five external N-type Power MOSFETs for proper operation. Two Power MOSFETs are
required for the illumination buck converter section (FETs LEXT and MEXT Figure 22) and three power MOSFETs
are required for the LED selection switches (FETs PEXT, QEXT and REXT in Figure 22). This section discusses the
selection criteria for these MOSFETs.
• Threshold voltage
• Gate charge
• Gate gate timing
• On-resistance, (RDS(on))
7.3.3.1 Threshold Voltage
The DLPA4000 has one drive output for each of the five power MOSFETs. Select MOSFETs that can be
energized with a gate-source voltage of 5 V because signal swing at these outputs is approximately 5 V. For the
three LED selection outputs (CHx_GATE_CTRL) and the low-side drive (ILLUM_LSIDE_DRIVE), the drive signal
refers to ground. The signal swing of the ILLUM_HSIDE_DRIVE output refers to the switch node of the converter,
ILLUM_A_SW. Use only N-channel MOSFETS.
7.3.3.2 Gate Charge and Gate Timing
Power MOSFETs typically specify the total gate charge required to energize and de-energize parameter. The
total gate charge informs the gate-to-source rise times and fall times. Make sure the maximum gate-to-source
rise times and fall times maximum are approximately between 20 ns and 30 ns. Because the typical high-side
driver pull-up resistance is approximately 5 Ω, use a maximum gate capacitance between 4 nF and 6 nF . Design
a maximum total gate charge between 20 nC and 30 nC.
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Internal non-overlap timing prevents both the high-side and low-side MOSFET of the illumination buck converter
from energizing simultaneously. Typical non-overlap timing of approximately 35 ns usually gives sufficient
margins. The DLPA4000 device measures the gate-to-source voltage of the external MOSFETs to determine
whether a MOSFET energized or not. This measurement is done at the pins of the DLPA4000. For the low-side
MOSFET this measurement is done between ILLUM_LSIDE_DRIVE and ILLUM_A_GND. Similarly, for the highside MOSFET the device measures the gate-to-source voltage between the ILLUM_HSIDE_DRIVE pin and the
ILLUM_A_SW pin. Because of the location of these measurement nodes, do not insert any additional drivers or
circuitry between the DLPA4000 and the external power MOSFETs of the buck converter. Delays can lead to
incorrect on-off detection of the FETs and cause shoot-through currents if the user inserts additional circuitry.
Shoot-through currents reduce efficiency, and more seriously damage the power MOSFETs.
LED selection switches require no specific criteria regarding the gate charge or gate timing. Timing of the LED
selection signals is in the microsecond range rather than nanosecond range.
7.3.3.3 On-resistance RDS(on)
Consider two issues relative to the drain-to-source on-resistance (RDS(on)) to select a MOSFET. The first
consideration is for the high-side MOSFET of the illumination buck-converter the RDS(ON) is a factor in the overcurrent detection. Secondly, for the other four MOSFETs the power dissipation drives the choice of the
MOSFETs RDS(on).
The DLPA4000 measures the drain-to-source voltage drop of the high-side MOSFET when energized to detect
an overcurrent situation. When the device detection circuit triggers, and de-energizes the high-side FET, the
high-side drive over current threshold (VDC-Th ) is 185 mV . Use Equation 8 to calculate the actual current level,
(IOC) that trigger the overcurrent detection.
IOC =
VDC F Th 185 mV
×
R DS :on ;
R DS :on ;
(8)
Use the on-resistance specification listed in the MOSFET datasheet for a high-temperature condition.For
example, the CSD87350Q5D NexFET specifies the on-resistance of 5 mΩ at 125 °C. The overcurrent level for a
design that uses this MOSFET is 37 A. This MOSFET is a good choice for a 32-A application.
Power dissipation due to conduction losses determines the on-resistance selection for the low-side MOSFET and
the three LED selection MOSFETs. Use Equation 9 to calculate the power dissipated in these MOSFETs.
PDISS = ± :IDS ;2 × R DS :on ;
P
where
•
IDS is the FET current
(9)
The lower the on-resistance the lower the power dissipation. For example, the on-resistance specified for the
CSD17556Q5B MOSFET is 1.2 mΩ. For a drain-to-source current of 32 A with a duty cycle of 25% (when the
MOSFET is used as LED selection switch) the dissipation is approximately 0.3 W.
7.3.4 DMD Supplies
Figure 13 shows the supplies needed for the DMD and DLPC block.
• LDO_DMD: for internal supply
• DMD_HV: regulator generates high voltage supplies
• Two buck converters: for DLPC/DMD voltages
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Figure 13. DMD Supplies Blocks
The DMD supplies block operates with the 0.65 DLP650NE DMD and the related DLPC4422. In addition to the
three high voltage supplies to power the DLPA4000, the DMD and the related DLPC4422 each require a supply,
Two buck converters provide the power.
The EEPROM of the DLPA4000 is factory programmed for a certain configuration, such as the type of buck
converter used. Use register 0x26 to read the EEPROM configuration using these bits:
• DMD_BUCK1_USE
• DMD_BUCK2_USE
Table 8 describes the function of register 0x26.
7.3.4.1 LDO DMD
The LDO DMD is a regulator dedicated to the DMD supplies block. The LDO DMD provides an analog supply
voltage of 5.5 V to the internal circuitry.
7.3.4.2 DMD HV Regulator
The DMD HV regulator generates three high voltage supplies: DMD_VRESET, DMD_VBIAS, and
DMD_VOFFSET (see Figure 14). The DMD HV regulator uses a switching regulator (switch A through switch D),
when the inductor shares time between all three supplies. The inductor charges to the current limit threshold and
then discharged into one of the three supplies. The regulator distributes available charge time between those
supplies that require a charge and when not all supplies require a charge.
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LDO DMD
(DRST_5P5V)
A
6
MBR0540
DRST_HS_IND
VRST
1 µF
35 V
DRST_LS_IND
2
D
100
C
DMD
HIGH VOLTAGE
REGULATOR
10 µH
1.25
A
DMD_VRESET
B
4
99
DRST_PGND
100 nF
25 V
100 nF
470 nF
25 V
50 V
DMD_VBIAS
VBIAS
DMD_VOFFSET
VOFS
98
G
1 µF
50 V
F
100 nF
25 V
E
Figure 14. DMD High Voltage Regulator
7.3.4.3 DMD/DLPC Buck Converters
Each of the two DMD buck converters creates a supply voltage for the DLPC device. The values of the voltages
for the DMD and DLPC used, for instance:
• DMD+DLPC4422: 1.1 V and 1.8 V
The topology of the buck converters is the same topology for the general purpose buck converters. See the Buck
Converters section for inductor and capacitor configuration .
A typical configuration uses a value of 3.3 µH for the inductor and a value of 2 × 22 µF for the output capacitor.
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97
96
PWR1_BOOST
PWR1_VIN
H
DMD/DLPC
PWR1
95
I
93
PWR1_SWITCH
PWR1_PGND
100 nF
25 V
470 pF
10 Ω 50V
VIN
2x10 µF
50 V
470 nF
50V
3.3 µH
3A
PWR1_FB
94
V_DMD-DLPC-1
2x22 µF
25 V
Low_ESR
PWR2_BOOST
76
75
PWR2_VIN
J
DMD/DLPC
PWR2
74
PWR2_SWITCH
K
73
PWR2_PGND
100 nF
25 V
470 pF
10 Ω 50 V
VIN
470 nF
50 V
2x22 µF
50 V
3.3 µH
3A
PWR2_FB
V_DMD-DLPC-2
2x22 µF
25 V
Low_ESR
72
Figure 15. DMD and DLPC Buck Converters
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7.3.4.4 DMD Monitoring
The device continuously monitors the DMD block for failures in order to prevent damage and to regulate the
DMD voltages. Potential failures include but are not limited to a broken control loop or a too high or too low
converter output voltage. Register 0x0C stores the overall DMD fault bit, DMD_FAULT. If any of the failures in
Table 2 occur, the device sets the DMD_FAULT bit to high.
Table 2. DMD FAULT Indication
POWER GOOD (REGISTER 0x29)
BLOCK
REGISTER BIT
THRESHOLD
HV Regulator
DMD_PG_FAULT
DMD_RESET: 90%,
DMD_OFFSET and DMD_VBIAS: 86% rising, 66% falling
PWR1
BUCK_DMD1_PG_FAULT
Ratio: 72%
PWR2
BUCK_DMD2_PG_FAULT
Ratio: 72%
PWR3 (LDO_2)
LDO_GP2_PG_FAULT /
LDO_DMD1_PG_ FAULT
80% rising, 60% falling
PWR4 (LDO_1)
LDO_GP1_PG_FAULT /
LDO_DMD1_PG_ FAULT
80% rising, 60% falling
OVER-VOLTAGE (REGISTER 0x2A)
BLOCK
REGISTER BIT
THRESHOLD (V)
PWR1
BUCK_DMD1_OV_FAULT
Ratio: 120%
PWR2
BUCK_DMD2_OV_FAULT
Ratio: 120%
PWR3 (LDO_2)
LDO_GP2_OV_FAULT /
LDO_DMD1_OV_FAULT
7
PWR4 (LDO_1)
LDO_GP1_OV_FAULT /
LDO_DMD1_OV_FAULT
7
7.3.4.4.1 Power Good
The DLPA4000 has power good indication for the DMD high-voltage (HV) regulator, DMD buck converters, DMD
LDOs, and the LDO_DMD that supports the high-voltage regulator.
The DLPA4000 device continuously monitors the DMD HV regulator output rails DMD_RESET, DMD_VOFFSET
and DMD_VBIAS. The DLP4000 device sets the DMD_ PG_FAULT bit in register 0x29 if either one of the output
rails drops out of regulation. This situation can be due to a shorted output or an overload. The DMD_RESET
threshold is 90%. The DMD_OFFSET and DMD_VBIAS thresholds are 86% (rising edge) and 66% (falling edge).
The power good signal for the two DMD buck converters indicate if each output voltage (PWR1_FB and
PWR2_FB) maintains a specified range. The relative power good ratio is 72%, which indicates the level (output
voltage falls below) at which the power good fault bit is asserted. The power good fault bits are in register 0x29,
BUCK_DMD1_PG_FAULT and BUCK_DMD2_PG_FAULT.
The device monitors the output voltage of the DMD_LDO1 pin and the DMD_LDO2 pin. The power good fault of
the LDO is asserted when the LDO voltage is below 80% (rising edge) or 60% (falling edge) of its intended
value. The power good fault indication for the LDOs is in register 0x29, LDO_GP1_PG_FAULT,
LDO_DMD1_PG_FAULT, LDO_GP2_PG_FAULT, LDO_DMD2_PG_FAULT.
The LDO_DMD pin regulates the DMD HV. The device asserts the power good fault of the LDO_DMD when the
LDO voltage goes below 80% (rising edge) or 60% (falling edge) of its intended value. Register 0x29 stores the
power good fault indication for this LDO as V5V5_LDO_DMD_PG_FAULT.
7.3.4.4.2 Overvoltage Fault
An overvoltage fault occurs when an output voltage rises above a specified threshold. The device indicates
overvoltage faults for the DMD buck converters, DMD LDOs and the LDO_DMD that support the DMD HV
regulator. The device does not include overvoltage fault of LDO1 and LDO2 in the overall DMD_FAULT when the
LDOs are used as general purpose LDOs. Table 2 provides an overview of the DMD overvoltage faults and
threshold levels.
32
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7.3.5 Buck Converters
The DLPA4000 contains three general purpose buck converters and a supporting LDO (LDO_BUCKS). The
three programmable 8-bit buck converters generate a voltage between 1 V and 5 V. The buck converters have
an output current limit of 2 A. The device supports only General Purpose Buck2 (PWR6) types. Figure 16 shows
one of the buck converters and the LDO_BUCKS.
The two DMD or DLPC buck converters discussed earlier in DMD Supplies have the same architecture as these
three buck converters and can be configured in the same way.
PWR_VIN
1 µF/16 V
83
LDO
BUCKS
VIN
PWR_5P5V
84
1 µF/6.3 V
65
PWR6_BOOST
PWR6_VIN
100 nF
25 V
64
General Purpose
BUCK2
63
VIN
PWR6_SWITCH
PWR6_PGND
62
66
PWR6_FB
CSNx RSNx
2x10 µF
16 V
LOUT
3.3 µH
3A
V_OUT
COUT
2x22 µF
6.3 V
Low_ESR
Figure 16. Buck Converter
7.3.5.1 LDO Bucks
This regulator supports the three general purpose buck converters and the 2 DMD or DLPC buck converters The
regulator provides an analog voltage of 5.5 V to the internal circuitry.
7.3.5.2 General Purpose Buck Converters
Register 0x01 (BUCK_GP2_EN) controls the general purpose buck converters (GP2) (Figure 16).
Use register 0x14 to configure the converter outpout voltage between 1 V and 5 V with an 8-bit resolution.
The device supports only General Purpose Buck2 (PWR6) types. has a current capability of 2 A. The device
does not support other buck converters such as PWR5 or PWR7.
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The buck converter operates in one of two switching modes; Normal mode (600 kHz switching frequency), mode
and skip mode. Applications operate with an increase in light-load efficiency in skip mode. As the output current
decreases from a heavy-load condition, the inductor current decreases. The inductor current eventually
decreases to a point where the ripple valley touches zero. Zero is the boundary between continuous conduction
and discontinuous conduction modes. The device de-energizes the rectifying MOSFET when it detects zero
inductor current. The converter transitions into discontinuous conduction mode as the load current further
decreases. Because the device maintains the on-time, it takes longer to discharge the output capacitor with a
smaller load current to the level of the reference voltage. Skip mode operation can toggle per buck converter in
register 0x16.
7.3.5.3 Buck Converter Monitoring
The device continuously monitors the buck converter block to prevent damage to the DLPA4000 and peripherals.
The device monitors several pin voltages. Table 3 summarizes the buck converter fault indications.
Table 3. Buck Converter Fault Indication
POWER GOOD (REGISTER 0X27)
BLOCK
REGISTER BIT
THRESHOLD (RISING EDGE)
Gen.Buck1
BUCK_GP1_PG_FAULT
Ratio 72%
Gen.Buck2
BUCK_GP2_PG_FAULT
Ratio 72%
Gen.Buck3
BUCK_GP3_PG_FAULT
Ratio 72%
OVERVOLTAGE (REGISTER 0X28)
BLOCK
REGISTER BIT
THRESHOLD (RISING EDGE)
Gen.Buck1
BUCK_GP1_OV_FAULT
Ratio 120%
Gen.Buck2
BUCK_GP2_OV_FAULT
Ratio 120%
Gen.Buck3
BUCK_GP3_OV_FAULT
Ratio 120%
7.3.5.3.1 Power Good
The device has individual power good indication for each buck converter and the supporting LDO_BUCK pin.
The power good indication for the buck converter monitors the output voltage (PWR6_FB) is within a defined
window. The relative power good ratio is 72%. This means that if the output voltage is below 72% of the set
voltage the PG_fault bit is set high. The power good bits of the buck converter are in register 0x27 bit:
• BUCK_GP2_PG_FAULT for BUCK2 (PWR6)
The LDO_BUCKS that supports the buck converters has its own power good indication. The power good of the
LDO_BUCKS is asserted if the LDO voltage is below 80% (rising edge) or 60% (falling edge) of its intended
value. The power good indication for the LDO_BUCKS is in register 0x29, V5V5_LDO_BUCK_PG_FAULT.
7.3.5.3.2 Overvoltage Fault
An over-voltage fault occurs when an output voltage rises above the specified threshold. The device indicates
overvoltage faults for the buck converters, and the LDO_BUCKS pin. The device asserts an overvoltage fault of
the LDO_BUCKS pin when the LDO voltage goes abve 7.2 V. Use register 0x2A,
V5V5_LDO_BUCK_OV_FAULT. The overvoltage of the general purpose buck converters is 120% of the set
value.
Register
0x28
stores
the
BUCK_GP1_OV_FAULT,
BUCK_GP2_OV_FAULT,
and
BUCK_GP3_OV_FAULT faults.
7.3.6 Auxiliary LDOs
Use the two auxiliary LDOs (LDO_1 and LDO_2) for external applications. Use all other LDOs for internally only.
Do not load these internal LDOs . LDO1 (PWR4) has a fixed voltage of 3.3 V. LDO2 (PWR3) has a fixed voltage
of 2.5 V. Both LDOs deliver 200 mA of output current.
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7.3.7 Measurement System
Figure 17 shows the circuitry that senses internal and external nodes. The implemented AFE comparator
converts the nodes to digital signals. Use the 0x0A register to enable AFE_EN. The reference signal for this
comparator, ACMPR_REF, is a low pass filtered PWM signal coming from the DLPC. A variable gain amplifier
(VGA) is added with three gain settings (1x, 9.5x, and 18x) allows the device to receive a wide range of input
signals . Use register 0x0A, to set the VGA gain (AFE_GAIN). The maximum input voltage of the VGA is 1.5 V.
The device reduces some large internal voltage to accomodate the VGA function.
From host
ACMPR_REF 82
ACMPR_IN_LABB 80
ACMPR_LABB_SAMPLE 55
From light sensor
From temperature sensor
ACMPR_IN_1 77
ACMPR_IN_2 78
S/H
SYSPWR/xx
ILLUM_A_FB/xx
ILLUM_B_FB/xx
CH1_SWITCH
CH2_SWITCH
CH3_SWITCH
RLIM_K1
RLIM_K2
VREF_1V2
VOTS
VPROG1/12
VPROG2/12
V_LABB
ACMPR_IN_1
ACMPR_IN_2
ACMPR_IN_3
MUX
81 ACMPR_OUT
To host
AFE
AFE_SEL[3:0]
AFE_GAIN [1:0]
ACMPR_IN_3 79
Figure 17. Measurement System Schematic
The device connects a multiplexer (MUX) to a wide range of nodes. Use egister 0X0A, to select the MUX input
(AFE_SEL) . Choose settings from these options:
• System input voltage, SYSPWR
• LED anode cathode voltage, ILLUM_A_FB
• LED cathode voltage, CHx_SWITCH
• V_RLIM to measure LED current
• Internal reference, VREF_1V2
• Die Temperature represented by voltage VOTS
• EEPROM programming voltage, VPROG1,2/12
• LABB sensor, V_LABB
• External sense pins, ACMPR_IN_1, ACMPR_IN_2, ACMPR_IN_3
The system input voltage VIN can be measured by selecting the SYSPWR/xx input of the MUX. the The device
must divide the voltage before the device supplies system input voltage to the MUX. Applications require this
process because the variable gain amplifier (VGA) handles voltages up-to 1.5 V but system voltages can be as
high as 20 V. The device combines the division factor selection (VIN division factor) with the auto LED turn off
functionality of the illumination driver . Use register 0x18 to ILLUM_LED_AUTO_OFF_SEL.
The device measures the LED voltages by monitoring the common anode of the LEDs and the cathode of each
LED individually. The device senses the feedback pin of the illumination driver (ILLUM_A_FB) to measure the
LED anode voltage (VLED). The device must divide the LED anode voltage before the device supplies input
voltage to the MUX. The device combines the division factor with the overvoltage fault level of the illumination
driver. Use register 0x19 to set VLED_OVP_VLED_RATIO. The device feeds the cathode voltages for
CH1_SWITCH, CH2_SWITCH,and CH3_SWITCH directly to the MUX without a division factor.
You can determine the LED current if you know the value of the sense resistor RLIM and the voltage across the
resistor. Measure the voltage at the high-side of the sense resistor can be measured by selecting MUX-input
RLIM_K1. The bottom-side of the resistor connects to GND.
The VOTS pin connects to an on-chip temperature sensor. The VOTS voltage measures the device junction
temperature:
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TJ = 300 × VVOTS – 270
(10)
The DLPA4000 has two EEPROM blocks for storage of trim bits, 0x30 to 0x35). Use these bytes for USER
EEPROM also. Use MUX input VPROG1/12 to measure the programming voltage of EEPROM block 1. Use
VPROGR2/12 to measure the programming voltage of EEPROM block 2. The device divides the EEPROM
programming voltage by 12 and then supplies the value to the MUX to prevent a too large voltage on the MUX
input. The EEPROM programming voltage is approximately 12 V.
The local area brightness boost (LABB) function increases brightness while maintaining good contrast and
saturation. Connect the sensor to pin ACMPR_IN_LABB. The device samples the light sensor signal. The device
holds the sample value separate from the sensor timing. Make sure the application uses these setting for LABB
oepration.
• The AFE block is enabled (0x0A, AFE_EN = 1)
• The LABB input is selected (0x0A, AFE_SEL<3:0>=3h)
• The AFE gain is set appropriately to have AFE_Gain x VLABB < 1.5 V (0x0A, AFE_GAIN<1:0>)
Use one of the following methods to sample the signal.
• Write to register 0x0B by specifying the sample time window (TSAMPLE_SEL) and set bit SAMPLE_LABB=1
to start sampling. The device automatically restes the SAMPLE_LABB bit in register 0x0B to 0 at the end of
the sample period to prepare for a next sample request.
• Use the input ACMPR_LABB_SAMPLE-pin as a sample signal. The signal on ACMPR_IN_LABB is tracked
while it is high. After the ACMP_LABB_SAMPLE goes lowm the value the device holds the value.
ACMPR_IN_1, ACMPR_IN_2,and ACMPR_IN_3 measure external signals from components such as a light
sensor or a temperature sensor. Make sure that the voltage on the input doe not exceed 1.5 V.
7.4 Device Functional Modes
Table 4. Modes of Operation
MODE
DESCRIPTION
OFF
This is the lowest-power mode of operation. All power functions are de-energized, registers are reset to their default values,
and the IC does not respond to SPI commands. RESET_Z pin is pulled low. The IC enters OFF mode whenever the
PROJ_ON pin is low.
WAIT
The DMD regulators and LED power (VLED) are turned off, but the IC does respond to the SPI. The device enters WAIT mode
whenever PROJ_ON is set high, DMD_EN (1) bit is set to 0 or a FAULT is resolved.
STANDBY
The device also enters STANDBY mode when a fault condition is detected (2). (See also section Interrupt). Once the fault
condition is resolved, WAIT mode is entered.
ACTIVE1
The DMD supplies are enabled but LED power (VLED) is disabled. PROJ_ON pin must be high, DMD_EN bit must be set to 1,
and ILLUM_EN (3) bit is set to 0.
ACTIVE2
DMD supplies and LED power are enabled. PROJ_ON pin must be high and DMD_EN and ILLUM_EN bits must both be set
to 1.
(1)
(2)
(3)
Settings can be done through register 0x01
Power-good faults, over-voltage, over-temperature shutdown, and undervoltage lockout
Settings can be done through register 0x01, bit is named ILLUM_EN
Table 5. Device State as a Function of Control-Pin Status
PROJ_ON Pin
36
STATE
LOW
OFF
HIGH
WAIT
STANDBY
ACTIVE1
ACTIVE2
(Device state depends on DMD_EN and ILLUM_EN bits and whether there are any fault
conditions.)
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POWERDOWN
Valid power source connected
PROJ_ON = low
PROJ_ON = low
OFF
VRESET = OFF
VBIAS = OFF
VOFFSET = OFF
VLED = OFF
SPI interface disabled
D_CORE_EN = low
RESET_Z = low
All registers set to default values
PROJ_ON = high
DMD_EN = 0
|| FAULT = 0
PROJ_ON = low
WAIT
DMD_EN = 1
& FAULT = 0
STANDBY
DMD_EN = 0
|| FAULT = 1
PROJ_ON = low
ACTIVE 1
VLED_EN = 1
VLED_EN = 0
DMD_EN = 0
|| FAULT = 1
PROJ_ON = low
ACTIVE 2
VRESET = OFF
VBIAS = OFF
VOFFSET = OFF
VLED = OFF
SPI interface enabled
D_CORE_EN = high
RESET_Z = high
VRESET = OFF
VBIAS = OFF
VOFFSET = OFF
VLED = OFF
SPI interface enabled
D_CORE_EN = high
RESET_Z = low
VRESET = ON
VBIAS = ON
VOFFSET = ON
VLED = OFF
SPI interface enabled
D_CORE_EN = high
RESET_Z = high
VRESET = ON
VBIAS = ON
VOFFSET = ON
VLED = ON
SPI interface enabled
D_CORE_EN = high
RESET_Z = high
A.
|| = OR, & = AND
B.
FAULT = Undervoltage on any supply, thermal shutdown, or UVLO detection
C.
UVLO detection, per the diagram, causes the DLPA4000 to go into the standby state. Standby state is not the lowest
power state. If the application requires lower power, set PROJ_ON low.
D.
DMD_EN register bit can be reset or set by SPI writes. DMD_EN defaults to 0 when PROJ_ON goes from low to high
and then the DLPC4422 software automatically sets it to 1. Also, FAULT = 1 causes the DMD_EN register bit to be
reset.
E.
D_CORE_EN is a signal internal to the DLPA4000. This signal turns on the VCORE regulator.
Figure 18. State Diagram
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7.5 Programming
This section discusses the serial protocol interface (SPI) of the DLPA4000 as well as the interrupt handling,
device shutdown and register protection.
7.5.1 SPI
The DLPA4000 provides a 4-wire SPI port that supports two SPI clock frequency modes: 0 MHz to 36 MHz and
20 MHz to 40MHz. The clock frequency mode can be set in register 0x17, DIG_SPI_FAST_SEL. The interface
supports both read and write operations. The SPI_SS_Z input serves as the active low chip select for the SPI
port. The SPI_SS_Z input must be forced low for writing to or reading from registers. When SPI_SS_Z is forced
high, the data at the SPI_MOSI input is ignored, and the SPI_MISO output is forced to a high-impedance state.
The SPI_MOSI input serves as the serial data input for the port; the SPI_MISO output serves as the serial data
output. The SPI_CLK input serves as the serial data clock for both the input and output data. Data at the
SPI_MOSI input is latched on the rising edge of SPI_CLK, while data is clocked out of the SPI_MISO output on
the falling edge of SPI_CLK. Figure 19 illustrates the SPI port protocol. Byte 0 is referred to as the command
byte, where the most significant bit is the write/not-read bit. For the W/nR bit, a 1 indicates a write operation,
while a 0 indicates a read operation. The remaining seven bits of the command byte are the register address
targeted by the write or read operation. The SPI port supports write and read operations for multiple sequential
register addresses through the implementation of an auto-increment mode. As shown in Figure 19, the autoincrement mode is invoked by simply holding the SPI_SS_Z input low for multiple data bytes. The register
address is automatically incremented after each data byte transferred, starting with the address specified by the
command byte. After reaching address 0x7Fh the address pointer jumps back to 0x00h.
Set SPI_CS_Z=1 here to write/read one register location
SPI_SS_Z
Hold SPI_CS_Z=0 to enable auto-increment mode
Header
SPI_MOSI
Register Data (write)
Byte0
Byte1
Byte2
Byte3
ByteN
Register Data (read)
SPI_MISO
Data for A[6:0]
Data for A[6:0]+1
Data for A[6:0]+(N-2)
SPI_CLK
Byte0
Byte1 <un-used address space>
Set high for write, low for read
SPI_MOSI
W/nR
A6
A5
A4
A3
A2
A1
A0
N7
N6
N5
N4
N3
N2
N1
N0
Register Address
SPI_CLK
Figure 19. SPI Protocol
38
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Programming (continued)
SPI_SS_Z
tCSCR
tCLKL
tCLKH
tCFCS
SPI_CLK
tCDS
tCDH
SPI_MOSI
tCFDO
SPI_MISO
tiS
tiH
tCSZ
Hi-Z
Hi-Z
Figure 20. SPI Timing Diagram
7.5.2 Interrupt
The DLPA4000 has the capability to flag for several faults in the system, such as overheating, low battery, power
good and over voltage faults. If a certain fault condition occurs one or more bits in the interrupt register (0x0C)
gets set. The setting of a bit in register 0x0C triggers an interrupt event, which pulls down the INT_Z pin.
Interrupts can be masked by setting the respective MASK bits in register 0x0D. Setting a MASK bit prevents the
INT_Z from pulling low for the particular fault condition. Some high-level faults are composed of multiple low-level
faults. The high-level faults can be read in register 0x0C, while the lower-level faults can be read in register
0x027 through 0x2A. An overview of the faults and how they are related is given in Table 6.
Table 6. Interrupt Registers
HIGH-LEVEL
MID-LEVEL
LOW-LEVEL
DMD_PG_FAULT
BUCK_DMD1_PG_FAULT
BUCK_DMD1_OV_FAULT
BUCK_DMD2_PG_FAULT
DMD_FAULT
BUCK_DMD2_OV_FAULT
LDO_GP1_PG_FAULT / LDO_DMD1_PG_FAULT
SUPPLY_FAULT
LDO_GP1_OV_FAULT / LDO_DMD1_OV_FAULT
LDO_GP2_PG_FAULT / LDO_DMD2_PG_FAULT
LDO_GP2_OV_FAULT / LDO_DMD2_OV_FAULT
BUCK_GP2_PG_FAULT
BUCK_GP2_OV_FAULT
ILLUM_BC1_PG_FAULT
ILLUM_FAULT
ILLUM_BC1_OV_FAULT
ILLUM_BC2_PG_FAULT
ILLUM_BC2_OV_FAULT
PROJ_ON_INT
BAT_LOW_SHUT
BAT_LOW_WARN
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Programming (continued)
Table 6. Interrupt Registers (continued)
HIGH-LEVEL
MID-LEVEL
LOW-LEVEL
TS_SHUT
TS_WARN
7.5.3 Fast-Shutdown in Case of Fault
The DLPA4000 has 2 shutdown-down modes: a normal shutdown initiated after pulling PROJ_ON level low and
a fast power-down mode. The fast shutdown feature can be enabled/disabled via register 0x01,
FAST_SHUTDOWN_EN. By default the mode is enabled.
When the fast power-down feature is enabled, a fast shutdown is initiated for specific faults. This shutdown
happens autonomously from the DLPC. The DLPA4000 enters the fast-shutdown mode only for specific faults,
thus not for all the faults flagged by the DLPA4000. The faults for which the DLPA4000 goes into fast-shutdown
are listed in Table 7.
Table 7. Faults that Trigger a Fast-Shutdown
HIGH-LEVEL
LOW-LEVEL
BAT_LOW_SHUT
TS_SHUT
DMD_PG_FAULT
BUCK_DMD1_PG_FAULT
BUCK_DMD1_OV_FAULT
BUCK_DMD2_PG_FAULT
DMD_FAULT
BUCK_DMD2_OV_FAULT
LDO_GP1_PG_FAULT / LDO_DMD1_PG_FAULT
LDO_GP1_OV_FAULT / LDO_DMD1_OV_FAULT
LDO_GP2_PG_FAULT / LDO_DMD2_PG_FAULT
LDO_GP2_OV_FAULT / LDO_DMD2_OV_FAULT
ILLUM_FAULT
ILLUM_BC1_OV_FAULT
ILLUM_BC2_OV_FAULT
7.5.4 Protected Registers
By default all regular USER registers are writable, except for the READ ONLY registers. Registers can be
protected though to prevent accidental write operations. By enabling the protecting, only USER registers 0x02
through 0x09 are writable. Protection can be enabled/ disabled via register 0x2F, PROTECT_USER_REG.
7.5.5 Writing to EEPROM
The DLPA4000 has an EEPROM mainly intended for default settings and factory trimming parameters. Registers
0x30 through 0x35 can freely be used for customer convenience though, to write a serial number or version
information for instance. Writing to EEPROM requires a couple of steps. First the EEPROM needs to be
unlocked. Unlock the EEPROM by writing 0xBAh to register 0x2E followed by writing 0xBE to the same register.
Both writes must be consecutive, that is, there must be no other read or write operation in between sending
these two bytes. Once the password has been successfully written, register 0x30h through 0x35h are unlocked
and can be write accessed using the regular SPI protocol. They remain unlocked until any byte other than
0xBABE is written to PASSWORD register 0x2E or the part is power cycled. To permanently store the written
data in EEPROM write a 1 to register 0x2F, EEPROM_PROGRAM, > 250 ms later followed by writing a 0 to the
same register.
To check if the registers are unlocked, read back the PASSWORD register 0x2E. If the data returned is 0x00h,
the registers are locked. If the PASSWORD register returns 0x01h, the registers are unlocked.
40
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7.6 Register Maps
Register Address, Default, R/W, Register name. Boldface settings are the hardwired defaults.
Table 8. Register Map
NAME
BITS
DESCRIPTION
0x00, E3, R/W, Chip Identification
CHIPID
[7:4]
Chip identification number: E (hex)
REVID
[3:0]
Revision number, 3 (hex)
0x01, 82, R/W, Enable Register
FAST_SHUTDOWN_EN
[7]
0: Fast shutdown disabled
1: Fast shutdown enabled
CW_EN
[6]
0: Color wheel circuitry disabled
1: Color wheel circuitry enabled
Reserved
[5]
BUCK_GP2_EN
[4]
Reserved
[3]
ILLUM_LED_AUTO_OFF_EN
[2]
0: Illum_led_auto_off_en disabled
1: Illum_led_auto_off_en enabled
ILLUM_EN
[1]
0: Illum regulators disabled
1: Illum regulators enabled
DMD_EN
[0]
0: DMD regulators disabled
1: DMD regulators enabled
[7]
Reserved, values don't care
0: General purpose buck2 disabled
1: General purpose buck2 enabled
0x02, 70, R/W, IREG Switch Control
Rlim voltage top-side (mV). Illum current limit = Rlim voltage / Rlim
ILLUM_ILIM
ILLUM_SW_ILIM_EN
[6:3]
0000: 17
1000: 73
0001: 20
1001: 88
0010: 23
1010: 102
0011: 25
1011: 117
0100: 29
1100: 133
0101: 37
1101: 154
0110: 44
1110: 176
0111: 59
1111: 197
[2:0]
Bit2: CH3, MOSFET R transient current limit (0:disabled, 1:enabled)
Bit1: CH2, MOSFET Q transient current limit (0:disabled, 1:enabled)
Bit0: CH1, MOSFET P transient current limit (0:disabled, 1:enabled)
[7:2]
Reserved, values don't care
[1:0]
Led current of CH1(A) = ((Bit value + 1)/1024) × (150 mV / Rlim), Most significant bits of 10
bits register (register 0x03 and 0x04).
00 0000 0000 [OFF]
00 0011 0011 [(52/1024) × (150mV/Rlim)], Minimum code.
….
11 1111 1111 [150mV/Rlim]
0x03, 00, R/W, SW1_IDAC(1)
SW1_IDAC<9:8>
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Register Maps (continued)
Table 8. Register Map (continued)
NAME
BITS
DESCRIPTION
0x04, 00, R/W, SW1_IDAC(2)
SW1_IDAC<7:0>
[7:0]
Led current of CH1(A) = ((Bit value + 1)/1024) × (150 mV / Rlim), Least significant bits of 10
bits register (register 0x03 and 0x04).
00 0000 0000 [OFF]
00 0011 0011 [(52/1024) × (150mV/Rlim)], Minimum code.
….
11 1111 1111 [150mV/Rlim]
[7:2]
Reserved, value don’t care.
[1:0]
Led current of CH2(A) = ((Bit value + 1)/1024) × (150 mV / Rlim), Most significant bits of 10
bits register (register 0x05 and 0x06).
00 0000 0000 [OFF]
00 0011 0011 [(52/1024) × (150mV/Rlim)], Minimum code.
….
11 1111 1111 [150mV/Rlim]
[7:0]
Led current of CH2(A) = ((Bit value + 1)/1024) × (150 mV / Rlim), Least significant bits of 10
bits register (register 0x05 and 0x06).
00 0000 0000 [OFF]
00 0011 0011 [(52/1024) × (150mV/Rlim)], Minimum code.
….
11 1111 1111 [150mV/Rlim]
[7:2]
Reserved, value don’t care.
[1:0]
Led current of CH3(A) = ((Bit value + 1)/1024) × (150 mV / Rlim), Most significant bits of 10
bits register (register 0x07 and 0x08).
00 0000 0000 [OFF]
00 0011 0011 [(52/1024) × (150mV/Rlim)], Minimum code.
….
11 1111 1111 [150mV/Rlim]
[7:0]
Led current of CH3(A) = ((Bit value + 1)/1024) × (150 mV / Rlim), Least significant bits of 10
bits register (register 0x07 and 0x08).
00 0000 0000 [OFF]
00 0011 0011 [(52/1024) × (150mV/Rlim)], Minimum code.
….
11 1111 1111 [150mV/Rlim]
0x05, 00, R/W, SW2_IDAC(1)
SW2_IDAC<9:8>
0x06, 00, R/W, SW2_IDAC(2)
SW2_IDAC<7:0>
0x07, 00, R/W, SW3_IDAC(1)
SW3_IDAC<9:8>
0x08, 00, R/W, SW3_IDAC(2)
SW3_IDAC<7:0>
0x09, 00, R/W, Switch ON/OFF Control
SW3
[7]
Only used if DIRECT MODE is enabled (see register 0x2F)
0: SW3 disabled
1: SW3 enabled
SW2
[6]
Only used if DIRECT MODE is enabled (see register 0x2F)
0: SW2 disabled
1: SW2 enabled
SW1
[5]
Only used if DIRECT MODE is enabled (see register 0x2F)
0: SW1 disabled
1: SW1 enabled
[4:0]
Reserved, value don’t care.
0x0A, 00, R/W, Analog Front End (1)
AFE_EN
[7]
0: Analog front end disabled
1: Analog front end enabled
AFE_CAL_DIS
[6]
0: Calibrated 18x AFE_VGA
1: Uncalibrated 18x AFE_VGA
AFE_GAIN
42
[5:4]
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Gain analog front end gain
00: Off
01: 1x
10: 9.5x
11: 18x
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Register Maps (continued)
Table 8. Register Map (continued)
NAME
BITS
DESCRIPTION
[3:0]
Selected analog multiplexer input
0000: ILLUM_A_FB/xx, where xx is controlled by VLED_OVP_VLED_RATIO <4:0>
(reg0x19)
0001: ILLUM_B_FB/xx, where xx is controlled by VLED_OVP_VLED_RATIO <4:0> (reg0x19)
0010: VIN/xx, where xx is controlled by ILLUM_LED_AUTO_OFF_SEL <3:0> (reg0x18)
0011: V_LABB
0100: RLIM_K1
0101: RLIM_K2
0110: CH1_SWITCH
0111: CH2_SWITCH
1000: CH3_SWITCH
1001: VREF_1V2
1010: VOTS (Main temperature sense block output voltage)
1011: VPROG1/12 (EEPROM block1 programming voltage divided by 12)
1100: VPROG2/12 (EEPROM block2 programming voltage divided by 12)
1101: ACMPR_IN_1
1110: ACMPR_IN_2
1111: ACMPR_IN_3
TSAMPLE_SEL
[7:6]
Samples time LABB Sensor (µs)
00: 7
01: 14
10: 21
11: 28
SAMPLE_LABB
[5]
AFE_SEL
0x0B, 00, R/W, Analog Front End (2)
0: LABB SAMPLING disabled
1: START LABB SAMPLING (auto reset to 0 after TSAMPLE_SEL time).
OVP_VIN Division factor.
VLED_OVP_VIN_RATIO
[4:0]
00000: 3.33
01000: 6.10
10000: 9.16
11000: 12.51
00001: 4.98
01001: 6.23
10001: 9.60
11001: 12.94
00010: 5.23
01010: 6.67
10010: 9.99
11010: 13.31
00011: 5.32
01011: 7.11
10011: 10.41
11011: 13.70
00100: 5.42
01100: 7.50
10100: 10.88
11100: 14.11
00101: 5.52
01101: 7.96
10101: 11.26
11101: 14.56
00110: 5.62
01110: 8.34
10110: 11.67
11110: 15.04
00111: 5.85
01111: 8.77
10111: 12.11
11111: 15.41
0x0C, 00, R, Main Status Register
SUPPLY_FAULT
[7]
0: No PG or OV failures for any of the LV Supplies
1: PG failures for a LV Supplies
ILLUM_FAULT
[6]
0: ILLUM_FAULT = LOW
1: ILLUM_FAULT = HIGH
PROJ_ON_INT
[5]
0: PROJ_ON = HIGH
1: PROJ_ON = LOW
DMD_FAULT
[4]
0: DMD_FAULT = LOW
1: DMD_FAULT = HIGH
BAT_LOW_SHUT
[3]
0: VIN > UVLO_SEL<4:0>
1: VIN < UVLO_SEL<4:0>
BAT_LOW_WARN
[2]
0: VIN > LOWBATT_SEL<4:0>
1: VIN < LOWBATT_SEL<4:0>
TS_SHUT
[1]
0: Chip temperature < 132.5°C and no violation in V5V0
1: Chip temperature > 156.5°C, or violation in V5V0
TS_WARN
[0]
0: Chip temperature < 121.4°C
1: Chip temperature > 123.4°C
[7]
0: Not masked for SUPPLY_FAULT interrupt
1: Masked for SUPPLY_FAULT interrupt
0x0D, F5, Interrupt Mask Register
SUPPLY_FAULT_MASK
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Register Maps (continued)
Table 8. Register Map (continued)
NAME
BITS
DESCRIPTION
ILLUM_FAULT_MASK
[6]
0: Not masked for ILLUM_FAULT interrupt
1: Masked for ILLUM_FAULT interrupt
PROJ_ON_INT_MASK
[5]
0: Not masked for PROJ_ON_INT interrupt
1: Masked for PROJ_ON_INT interrupt
DMD_FAULT_MASK
[4]
0: Not masked for DMD_FAULT interrupt
1: Masked for DMD_FAULT interrupt
BAT_LOW_SHUT_MASK
[3]
0: Not masked for BAT_LOW_SHUT interrupt
1: Masked for BAT_LOW_SHUT interrupt
BAT_LOW_WARN_MASK
[2]
0: Not masked for BAT_LOW_WARN interrupt
1: Masked for BAT_LOW_WARN interrupt
TS_SHUT_MASK
[1]
0: Not masked for TS_SHUT interrupt
1: Masked for TS_SHUT interrupt
TS_WARN_MASK
[0]
0: Not masked for TS_WARN interrupt
1: Masked for TS_WARN interrupt
0x0E, 00, R/W, Break-Before-Make Delay
BBM_DELAY
[7:0]
Break before make delay register (ns), step size is 111 ns
0000 0000: 0
0000 0001: 333
0000 0010: 444
0000 0011: 555
….
1111 1101: 28305
1111 1110: 28416
1111 1111: 28527
0x0F, 07, R/W, Fast Shutdown Timing
VOFS/RESETZ_DEL
AY (µs)
VOFS/RESETZ_DELAY
[7:4]
0000: 4.000 – 4.445
1000: 6.230 – 7.120
0001: 8.010 – 8.900
1001: 12.46 – 14.24
0010: 16.02 – 17.80
1010: 24.89 – 28.44
0011: 32.00 – 35.55
1011: 49.77 – 56.88
0100: 63.99 – 71.10
1100: 99.5 – 113.8
0101: 128.0 – 142.2
1101: 199.1 – 227.6
0110: 256.0 – 284.5
1110: 398.3 – 455.2
0111: 512.1 – 569.0
1111: 1024.2 –
1138.0
VBIAS/VRST_DELAY
(µs)
VBIAS/VRST_DELAY
[3:0]
0000: 4.000 – 4.445
1000: 6.230 – 7.120
0001: 8.010 – 8.900
1001: 12.46 – 14.24
0010: 16.02 – 17.80
1010: 24.89 – 28.44
0011: 32.00 – 35.55
1011: 49.77 – 56.88
0100: 63.99 – 71.10
1100: 99.5 – 113.8
0101: 128.0 – 142.2
1101: 199.1 – 227.6
0110: 256.0 – 284.5
1110: 398.3 – 455.2
0111: 512.1 – 569.0
1111: 1024.2 –
1138.0
0x10, C0, R/W, VOFS State Duration
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Register Maps (continued)
Table 8. Register Map (continued)
NAME
BITS
VOFS_STATE_DURATION
[7:5]
DESCRIPTION
Duration of VOFS state (ms)
000: 1
001: 5
010: 10
011: 20
100: 40
101: 80
110: 160
111: 320
Low Battery level Selection
LOWBATT_SEL
[4:0]
00000: 3.93
01000: 7.27
10000: 10.94
11000: 14.96
00001: 5.92
01001: 7.43
10001: 11.46
11001: 15.47
00010: 6.21
01010: 7.95
10010: 11.92
11010: 15.91
00011: 6.32
01011: 8.46
10011: 12.42
11011: 16.37
00100: 6.43
01100: 8.93
10100: 12.97
11100: 16.87
00101: 6.55
01101: 9.47
10101: 13.42
11101: 17.40
00110: 6.67
01110: 9.92
10110: 13.91
11110: 17.96
00111: 6.93
01111: 10.42
10111: 14.43
11111: 18.41
0x11, 00, R/W, VBIAS State Duration
VBIAS_STATE_DURATION
[7:5]
Duration of VBIAS state (ms)
000: bypass
001: 5
010: 10
011: 20
100: 40
101: 80
110: 160
111: 320
Under Voltage Lockout level Selection
UVLO_SEL
[4:0]
Copyright © 2018, Texas Instruments Incorporated
00000: 3.93
01000: 7.27
10000: 10.94
11000: 14.96
00001: 5.92
01001: 7.43
10001: 11.46
11001: 15.47
00010: 6.21
01010: 7.95
10010: 11.92
11010: 15.91
00011: 6.32
01011: 8.46
10011: 12.42
11011: 16.37
00100: 6.43
01100: 8.93
10100: 12.97
11100: 16.87
00101: 6.55
01101: 9.47
10101: 13.42
11101: 17.40
00110: 6.67
01110: 9.92
10110: 13.91
11110: 17.96
00111: 6.93
01111: 10.42
10111: 14.43
11111: 18.41
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Register Maps (continued)
Table 8. Register Map (continued)
NAME
BITS
DESCRIPTION
0x14, 00, R/W, GP2 Buck Converter voltage Selection
BUCK_GP2_TRIM
[7:0]
General purpose2 buck output voltage = 1+ bit value * 15.69 (stepsize = 15.69 mV)
00000000 1 V
….
11111111 5 V
[7:5]
Reserved, value don’t care.
[4:0]
Skip Mode:
Bit4: Buck_GP3 (0:disabled, 1:enabled)
Bit3: Buck_GP1 (0:disabled, 1:enabled)
Bit2: Buck_GP2 (0:disabled, 1:enabled)
Bit1: Buck_DMD1 (0:disabled, 1:enabled)
Bit0: Buck_DMD2 (0:disabled, 1:enabled)
0x16, 00, R/W, Buck Skip Mode
BUCK_SKIP_ON
0x17, 02, R/W, User Configuration Selection Register
[7]
0: SPI Clock from 0 to 36 MHz
1: SPI Clock from 20 to 40 MHz
[6]
Reserved, value don’t care.
ILLUM_EXT_LSD_CUR_LIM_EN
[5]
0: Current limiting disabled (External FETs mode)
1: Current limiting enabled (External FETs mode)
Reserved
[4]
ILLUM_3A_INT_SWITCH_SEL
[3]
ILLUM_DUAL_OUTPUT_CNTR_SE
L
[2]
ILLUM_INT_SWITCH_SEL
[1]
ILLUM_EXT_SWITCH_SEL
[0]
DIG_SPI_FAST_SEL
Illum Configuration: most significant bit is ILLUM_EXT_SWITCH_CAP<6> (Reg0x26). Other
4 bits are <3:0> of this register. “x” is don’t care.
x xx00: Off
x x110: 2 x 3 A Internal FETs
x 0010: 1 x 6 A Internal FETs
x 1010: 1 x 3 A Internal FETs
0 xx0x: Off
0 x11x: 2 x 3 A Internal FETs
0 001x: 1 x 6 A Internal FETs
0 101x: 1 x 3 A Internal FETs
0 xxx1: External FETs
0x18, 00, R/W, OLV -ILLUM_LED_AUTO_OFF_SEL
ILLUM_OLV_SEL
46
[7:4]
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Illum openloop voltage (V) = 3 + bit value * 1 (stepsize = 1 V)
0000: 3 V
0001: 4 V
...
1110: 17 V
1111: 18 V
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Register Maps (continued)
Table 8. Register Map (continued)
NAME
ILLUM_LED_AUTO_OFF_SEL
BITS
[3:0]
DESCRIPTION
Bit value
Led Auto Off Level
(V)
VIN division factor
0000
3.93
3.33
0001
5.92
4.98
0010
6.21
5.23
0011
6.32
5.32
0100
6.43
5.42
0101
6.55
5.52
0110
6.67
5.62
0111
6.93
5.85
1000
7.27
6.10
1001
7.95
6.67
1010
8.93
7.50
1011
9.92
8.34
1100
10.94
9.16
1101
11.92
9.99
1110
12.97
10.88
1111
13.91
11.67
0x19, 1F, R/W, Illumination Buck Converter Overvoltage Fault Level
Reserved
[7:5]
Bit value / OVP VLED Division factor
VLED_OVP_VLED_RATIO
[4:0]
00000: 3.33
01000: 6.10
10000: 9.16
11000: 12.51
00001: 4.98
01001: 6.23
10001: 9.60
11001: 12.94
00010: 5.23
01010: 6.67
10010: 9.99
11010: 13.31
00011: 5.32
01011: 7.11
10011: 10.41
11011: 13.70
00100: 5.42
01100: 7.50
10100: 10.88
11100: 14.11
00101: 5.52
01101: 7.96
10101: 11.26
11101: 14.56
00110: 5.62
01110: 8.34
10110: 11.67
11110: 15.04
00111: 5.85
01111: 8.77
10111: 12.11
11111: 15.41
0x1B, 00, R/W, Color Wheel PWM Voltage(1)
CW_PWM <7:0>
[7:0]
Copyright © 2018, Texas Instruments Incorporated
Least significant 8 bits of 16 bits register (register 0x1B and 0x1C) Average color wheel PWM
voltage (V), step size = 76.294 µV
0x0000 0 V
....
0xFFFF 5 V
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Register Maps (continued)
Table 8. Register Map (continued)
NAME
BITS
DESCRIPTION
0x1C, 00, R/W, Color Wheel PWM Voltage(2)
CW_PWM <15:8>
[7:0]
Most significant 8 bits of 16 bits register (register 0x1B and 0x1C) Average color wheel PWM
voltage (V), step size = 76.294 µV
0x0000 0 V
....
0xFFFF 5 V
0x25, 00, R/W, ILLUM BUCK CONVERTER BANDWIDTH SELECTION
reserved
[7:4]
ILED CONTROL LOOP BANDWIDTH INCREASE (dB)
00: 0
ILLUM_BW_BC1
[3,2]
01: 1.9
10: 4.7
11: 9.3
ILED CONTROL LOOP BANDWIDTH INCREASE (dB)
00: 0
ILLUM_BW_BC2
[1,0]
01: 1.9
10: 4.7
11: 9.3
0x26, DF, R, Capability register
LED_AUTO_TURN_OFF_CAP
[7]
0: LED_AUTO_TURN_OFF_CAP disabled
1: LED_AUTO_TURN_OFF_CAP enabled
ILLUM_EXT_SWITCH_CAP
[6]
0: No external switch control capability
1: External switch control capability included
CW_CAP
[5]
0: No color wheel capability
1: Color wheel capability included
Reserved
[4]
DMD_LDO1_USE
[3]
0: LDO1 not used for DMD, voltage set by user register
1: LDO1 used for DMD, voltage set by EEPROM
DMD_LDO2 _USE
[2]
0: LDO2 not used for DMD, voltage set by user register
1: LDO2 used for DMD, voltage set by EEPROM
DMD_BUCK1 _USE
[1]
0: DMD Buck1 disabled
1: DMD Buck1 used
DMD_BUCK2 _USE
[0]
0: DMD Buck2 disabled
1: DMD Buck2 used
0x27, 00, R, Detailed status register1 (Power good failures for general purpose and illumination blocks)
BUCK_GP3_PG_FAULT
[7]
0: No fault
1: Focus motor buck power good failure. Does not initiate a fast shutdown.
BUCK_GP1_PG_FAULT
[6]
0: No fault
1: General purpose buck1 power good failure. Does not initiate a fast shutdown.
BUCK_GP2_PG_FAULT
[5]
0: No fault
1: General purpose buck2 power good failure. Does not initiate a fast shutdown.
Reserved
[4]
ILLUM_BC1_PG_FAULT
[3]
0: No fault
1: Illum buck converter1 power good failure. Does not initiate a fast shutdown.
ILLUM_BC2_PG_FAULT
[2]
0: No fault
1: Illum buck converter2 power good failure. Does not initiate a fast shutdown.
[1]
Reserved, value always 0
[0]
Reserved, value always 0
0x28, 00, R, Detailed status register2 (Overvoltage failures for general purpose and illum blocks)
BUCK_GP3_OV_FAULT
48
[7]
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0: No fault
1: Focus motor buck overvoltage failure. Does not initiate a fast shutdown.
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DLPS132 – MAY 2018
Register Maps (continued)
Table 8. Register Map (continued)
NAME
BITS
DESCRIPTION
BUCK_GP1_OV_FAULT
[6]
0: No fault
1: General purpose buck1 overvoltage failure. Does not initiate a fast shutdown.
BUCK_GP2_OV_FAULT
[5]
0: No fault
1: General purpose buck2 overvoltage failure. Does not initiate a fast shutdown.
[4]
Reserved, value always 0
ILLUM_BC1_OV_FAULT
[3]
0: No fault
1: Illum buck converter1 overvoltage failure. Does not initiate a fast shutdown.
ILLUM_BC2_OV_FAULT
[2]
0: No fault
1: Illum buck converter2 overvoltage failure. Does not initiate a fast shutdown.
[1]
Reserved, value always 0
[0]
Reserved, value always 0
0x29, 00, R, Detailed status register3 (Power good failure for DMD related blocks)
[7]
Reserved, value always 0
DMD_PG_FAULT
[6]
0: No fault
1: VBIAS, VOFS and/or VRST power good failure. Initiates a fast shutdown.
BUCK_DMD1_PG_FAULT
[5]
0: No fault
1: Buck1 (used to create DMD voltages) power good failure. Initiates a fast shutdown.
BUCK_DMD2_PG_FAULT
[4]
0: No fault
1: Buck2 (used to create DMD voltages) power good failure. Initiates a fast shutdown.
[3]
Reserved, value always 0
[2]
Reserved, value always 0
LDO_GP1_PG_FAULT /
LDO_DMD1_PG_FAULT
[1]
0: No fault
1: LDO1 (used as general purpose or DMD specific LDO) power good failure. Initiates a fast
shutdown.
LDO_GP2_PG_FAULT /
LDO_DMD2_PG_FAULT
[0]
0: No fault
1: LDO2 (used as general purpose or DMD specific LDO) power good failure. Initiates a fast
shutdown.
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Register Maps (continued)
Table 8. Register Map (continued)
NAME
BITS
DESCRIPTION
0x2A, 00, R, Detailed status register4 (Overvoltage failures for DMD related blocks and Color Wheel)
[7]
Reserved, value always 0
[6]
Reserved, value always 0
BUCK_DMD1_OV_FAULT
[5]
0: No fault
1: Buck1 (used to create DMD voltage) overvoltage failure
BUCK_DMD2_OV_FAULT
[4]
0: No fault
1: Buck2 (used to create DMD voltage) overvoltage failure
[3]
Reserved, value always 0
[2]
Reserved, value always 0
LDO_GP1_OV_FAULT /
LDO_DMD1_OV_FAULT
[1]
0: No fault
1: LDO1 (used as general purpose or DMD specific LDO) overvoltage failure
LDO_GP2_OV_FAULT /
LDO_DMD2_OV_FAULT
[0]
0: No fault
1: LDO2 (used as general purpose or DMD specific LDO) overvoltage failure
0x2B, 01, R, Chip ID extension
CHIP_ID_EXTENTION
[7:0]
ID extension to distinguish between various configuration options.
0x2C, 00, R/W, ILLUM_LED_AUTO_TURN_OFF_DELAY SETTINGS
Reserved
[7:4]
TBD
ILLUM_LED_AUTO_TURN_OFF_DELAY (µsec)
ILLUM_LED_AUTO_TURN_OFF_D
ELAY
[3:0]
0000: 4.000-4.445
0100: 63.99-71.10
1000: 6.230-7.120
1100: 99.5-113.8
0001: 8.010-8.900
0101: 128.0-142.2
1001: 12.46-14.24
1101: 199.1-227.6
0010: 16.02-17.80
0110: 256.0-284.5
1010: 24.89-28.44
1110: 398.3-455.2
0011: 32.00-35.55
0111: 512.1-569.0
1011: 49.77-56.88
1111: 1024.2-1138.0
0x2E, 00, R/W, User Password
USER PASSWORD (0xBABE)
[7:0]
Write Consecutively 0xBA and 0xBE to unlock.
0x2F, 00, R/W, User Protection Register
[7:3]
Reserved, value don’t care.
EEPROM_PROGRAM
[2]
0: EEPROM programming disabled
1: Shadow register values programmed to EEPROM
DIRECT_MODE
[1]
0: Direct mode disabled
1: Direct mode enabled (register 0x09 to control switched)
PROTECT_USER_REG
[0]
0: ALL regular USER registers are WRITABLE, except for READ ONLY registers
1: ONLY USER registers 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, and 0x09 are
WRITABLE
0x30, 00, R/W, User EEPROM
Register
USER_REGISTER1
[7:0]
User EEPROM Register1
0x31, 00, R/W, User EEPROM Register
USER_REGISTER2
[7:0]
User EEPROM Register2
0x32, 00, R/W, User EEPROM Register
USER_REGISTER3
[7:0]
User EEPROM Register3
0x33, 00, R/W, User EEPROM Register
USER_REGISTER4
[7:0]
User EEPROM Register4
0x34, 00, R/W, User EEPROM Register
USER_REGISTER5
[7:0]
User EEPROM Register5
0x35, 00, R/W, User EEPROM Register
USER_REGISTER6
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8 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
In display applications, using the DLPA4000 provides all needed analog functions including all analog power
supplies and the RGB LED driver (up to 32A per LED) with high-side Pump functionality to provide a robust and
efficient display solution. Each DLP application is derived primarily from the optical architecture of the system
and the format of the data coming into the DLPC4422 controller.
8.2 Typical Application
A common application combines the DLPA4000 with the 0.65 WXGA DMD (DLP650LE) or a 0.65 1080P DMD
(DLP650NE) and a DLPC4422 controller to create a high resolution, LED projector. The DLPC4422 in the
projector typically receives images from a PC or video player using HDMI or VGA analog as shown in Figure 21.
Card readers and Wi-Fi can receive images when the application includes the appropriate peripheral
components. The DLPA4000 sequences the power-supply and controls the RGB LED currents in this application.
12- V Regulator
16 V to 20 V DC
Power Supplies
and Monitoring
HDMI
VGA
PROJ_ON
SPI
PWR_GOOD
PWR_ON
Front
End
Keypad
I2C
Shunt Diodes
Digital Control Block
DLPA4000
DATA
Flash
Illumination
Control
1.1 V
1.8 V
DLPC4422
DMD and
Controller Bucks
3.3 V
2.5 V
LDOs
3.3 V
GP Buck
Converter
External
High-Side Pump LED
Power
FETs
DMD
Reset
Voltage
Generator
Measurement
System
DMD Reset
Voltages and Control
Sensors
DLP650NE
DMD Data and Control
or
DLPA200
DLP650LE
Control
Figure 21. Typical Setup Using DLPA4000
8.2.1 Design Requirements
A high resolution LED projector can be created by using a DLP chip set comprised of a 0.65 WXGA DMD
(DLP650LE) or a 0.65 1080p DMD (DLP650NE), a DLPC4422 controller, and the DLPA4000 PMIC/LED Driver.
The DLPC4422 does the digital image processing, the DLPA4000 provides the needed analog functions for the
projector, and the DMD is the display device for producing the projected image. In addition to the three DLP
chips in the chip set, other components is required. At a minimum a Flash part is needed to store the software
and firmware to control the DLPC4422. The illumination light that is applied to the DMD is typically from red,
green, and blue LEDs. These are often contained in three separate packages, but sometimes more than one
color of LED die may be in the same package to reduce the overall size of the projector. Power MOSFETs are
needed external to the DLPA4000 so that high LED currents can be supported. For connecting the DLPC4422 to
the front end chip for receiving images, the parallel interface is typically used. Connect the front end chip to the
parallel interface, I2C to input commands to the DLPC4422.
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Typical Application (continued)
The DLPA4000 has three built-in buck switching regulators to serve as projector system power supplies. Two of
the regulators are fixed to 1.1 V and 1.8 V for powering the DLP chip set. The remaining buck regulator is
available for general purpose use and its voltages are programmable. The regulators can be used to a drive
variable-speed fans or to power other projector chips such as the front-end chip. The only power supply needed
at the DLPA4000 input is SYSPWR from an external DC power supply or internal battery. The entire projector
can be turned on and off by using a single signal called PROJ_ON. When PROJ_ON is high, the projector turns
on and begins displaying images. When PROJ_ON is set low, the projector turns off and draws just microamps
of current on SYSPWR.
8.2.2 Detailed Design Procedure
To connect the 0.65 WXGA DMD (DLP650LE) or 0.65 1080p DMD (DLP650NE), DLPC4422 controller and
DLPA4000, see the reference design schematic. When a circuit board layout is created from this schematic a
very small circuit board is possible. An example small board layout is included in the reference design data base.
Comply with the layout guidelines to achieve reliable projector operation. The optical engine that has the LED
packages and the DMD mounted to it is typically supplied by an optical OEM who specializes in designing optics
for DLP projectors.
The component selection of the buck converter is mainly determined by the output voltage. Table 9 shows the
recommended value for inductor LOUT and capacitor COUT for a given output voltage.
Table 9. Recommended Buck Converter LOUT and COUT
VOUT (V)
LOUT (µH)
COUT (µF)
MIN
TYP
MAX
MIN
MAX
1 - 1.5
1.5
2.2
4.7
22
68
1.5 - 3.3
2.2
3.3
4.7
22
68
3.3 - 5
3.3
4.7
22
68
Use Equation 11 to calculate the inductor peak-to-peak ripple current. Use Equation 12 the peak current. Use
Equation 13to calculate teh RMS current. The inductor saturation current rating must be greater than the
calculated peak current. The RMS or heating current rating of the inductor must be greater than the calculated
RMS current.
IL OUT
RIPPLE P FP
VOUT
VIN :max ; × kVIN :max ; F VOUT o
=
LOUT × fSW
where
•
the switching frequency of the buck converter is approximately 600 kHz
IL OUT
IL OUT
PEAK
= IL OUT +
RIPPLE P
(11)
FP
2
IL OUT
(12)
= ¨kIL OUT o +
2
RMS
1
× @IL OUT
RIPPLE
12
P
2
FP A
(13)
The capacitor value and ESR determines the level of output voltage ripple. Use ceramic or other low ESR
capacitors. Recommended values range from 22 to 68 μF. Use Equation 14 to determine the required RMS
current rating for the output capacitor.
IC OUT :rms ; =
VOUT × :VIN F VOUT ;
¾12 × VIN × LOUT × fSW
(14)
One other component for the buck converter configuration is needed. Use a charge pump capacitor between
PWRx_SWITCH and PWRx_BOOST to drive the high-side MOSFET. The recommended value for the charge
pump capacitor is 100 nF.
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Because the switching edges of the buck converter are relatively fast, voltage overshoot and ringing can become
a problem. To overcome this problem a snubber network is used. The snubber circuit consists of a resistor and
capacitor that are connected in series from the switch node to ground. The snubber circuit is used to damp the
parasitic inductances and capacitances during the switching transitions. This circuit reduces the ringing voltage
and also reduces the number of ringing cycles. The snubber network is formed by RSNx and CSNx. More
information on controlling switch-node ringing in synchronous buck converters and configuring the snubber can
be found in Analog Applications Journal.
8.2.2.1 Component Selection for General-Purpose Buck Converters
The theory of operation of a buck converter is explained in application note, Understanding Buck Power Stages
in Switchmode Power Supplies, SLVA057. This section is limited to the component selection. For proper
operation, selection of the external components is very important, especially the inductor LOUT and the output
capacitor COUT. Choose inductor and capacitors with low equivalent series resistance (ESR) specifications to
ensure the best efficiency and ripple performance.
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8.3 System Example With DLPA4000 Internal Block Diagram
N/C
Thermal Pad
1
LDO_V2V5
91
LDO_V5V
92
VINA
LDO
ILLUM
7
VREF
85
ϬdžϬфϯх
dͺ>Ktͺ^,hd
2.2 µF/25 V
Ϭdžϭϭфϰ͗Ϭх
hs>Kͺ^>
29
ϬdžϬфϮх
dͺ>KtͺtZE
30
ϬdžϭϬфϰ͗Ϭх
>Ktddͺ^>
28
L
AGND
26
86
AFE_GAIN [1:0]
From host
10 kΩ
10 kΩ
ACMPR_REF
ACMPR_OUT
To host
2.2 µF/25 V
SUP_5P0V
4.7 µF/25 V
42
8
VIN
SUP_2P5V
ILLUMINATION
DRIVER
A
AFE_SEL[3:0]
31
M
27
32
AFE
82
38
MUX
81
39
VIN
2.2 µF/25 V
ILLUM_VIN
VIN
ILLUM_5P5V
10 µF/10 V
ILLUM_A_FB
0.47 µF/50 V
3x10 µF/50 V
ILLUM_A_VIN
ILLUM_A_BOOST 3
3x10 µF/50 V
3.9 Ω
ILLUM_HSIDE_DRIVE
ILLUM_A_SW
1000 pF
50 V
ILLUM_LSIDE_DRIVE
ILLUM_A_PGND
2xB240A-13-F
2700 pF
50 V
2Ω
2200 pF
50 V
CSD87350Q5D
ILLUM_A_COMP2 15p
1 µH
32 A
6x22 µF
25 V
ILLUM_B_FB
34 ILLUM_B_VIN
ACMPR_IN_LABB
80
ACMPR_LABB_SAMPLE
S/H
ACMPR_IN_2
ACMPR_IN_3
N
ILLUMINATION
DRIVER
B
77
78
DRST_5P5V
10 µF/10 V
DRST_VIN
VIN
OSRAM P2 LEDs
VLED
79
3
41
LDO
DMD
5
4x ESDA18-1k
19
20
DRST_HS_IND
A
21
DRST_LS_IND
VRST
DMD_VRESET
470 nF/50 V
DRST_PGND
DMD_VBIAS
VBIAS
DMD_VOFFSET
VOFS
9/10
2
10 µF/1.25 A
0.1 µF/25 V
P
D
C
100
B
DMD
HIGH VOLTAGE
REGULATOR
4
99
17/
18
RGB
STROBE
DECODER
24/
25
Q
R
11/
16
22/
23
98
15
1 µF/35 V
14
G
0.1 µF/25 V
PWR1_BOOST
VIN
0.47 µF 470 pF
50 V
50 V
10 Ω
2x10 µF
50 V
3.3 µH
3A
PWR1_VIN
PWR1_SWITCH
PWR1_PGND
PWR1_FB
V_DMD-DLPC-1
2x22 µF
25 V
Low_ESR
PWR2_BOOST
0.1 µF
25 V
VIN
0.47 µF 470 pF
50 V
50 V
10 Ω
2x22 µF
50 V
3.3 µH
3A
PWR2_VIN
PWR2_SWITCH
PWR2_PGND
PWR2_FB
V_DMD-DLPC-2
2x22 µF
25 V
Low_ESR
13
F
98
0.1 µF
25 V
PWR4_VIN
3.3 V-20 V
2.2 µF/25 V
PWR4_OUT
E
12
69
97
67
96
H
95
I
DMD/DLPC
PWR1
PWR3_VIN
PWR3_OUT
CH2_GATE_CTRL
4x CSD17556Q5B
CH3_GATE_CTRL
General
Purpose
S
BUCK1
T
68
CH2_SWITCH
CH3_SWITCH
RLIM_1
4.7 nF
50 V
RLIM_2
RLIM_K_1
RLIM_BOT_K_1
100 Ω
RLIM_K_2
4m Ω
5W
RLIM_BOT_K_2
PWR5_BOOST
PWR5_VIN
71
76
65 PWR6_BOOST
64
74
K
DMD/DLPC
PWR2
General
Purpose
U
BUCK2
V
63
73
62
72
66
VIN
2x10 µF
50 V
PWR5_PGND
70
J
0.47 µF
50 V
PWR5_SWITCH
94
75
GPIO
(From
Controller)
CH1_SWITCH
93
PWR5_FB
0.1 µF
25 V
PWR6_VIN
PWR6_SWITCH
PWR6_PGND
470 pF 0.47 µF
50 V 10 Ω50 V
VIN
2x10 µF
50 V
3.3 µH
3A
PWR6_FB
1-5V / 8bit
2x22 µF
25 V
Low_ESR
90
50
LDO_1
DMD/DLPC/AUX
89
10 µF/10 V
3.3 V-20 V
2.2 µF/25 V
CH1_GATE_CTRL
6
0.1 µF/25 V
1 µF/35 V
ILLUM_B_PGND
ILLUM_B_COMP1
40
ILLUM_B_COMP2
10 µF/50 V
0.47 µF/50 V MBR0540T1
ILLUM_B_SW 10Ω
O
37
10 µF/10 V
VIN
10 µF
50 V
36
From light sensor
From temperature sensor
3300 pF
50 V
1.3 Ω
0.4 W
10Ω
33 ILLUM_B_BOOST
V_LABB
55
ACMPR_IN_1
2x
2xB0540WS-7
ILLUM_A_COMP1
0.1 uF/25 V
35
0.47 µF/50 V
0.1 µF
25 V
88
52
General
Purpose
W
BUCK3
X
PWR7_VIN
0.47 µF
50 V
53
54
LDO_2
DMD/DLPC/AUX
VIN
2x10 µF
50 V
PWR7_PGND
51
87
10 µF/10 V
PWR_VIN
CW_SPEED_PWM_OUT
44
CLK_OUT
43
83
Color Wheel
PWM
LDO
BUCKS
84
2.2 µF/25 V
VIN
PWR_5P5V
10 µF/10 V
PROJ_ON
From host
CH_SEL_0
From host
CH_SEL_1
From host
56
57
SPI_VIN
SPI_SS_Z
From host
SPI_CLK
From host
SPI_MISO
To host
From host
30.1 Ω
SPI_MOSI
To system
61
1 µF/35 V
0.1 µF/25 V
From host
RESET_Z
60
DIGITAL
CORE
45
58
48
46
47
SPI
INT_Z
To DLPC
(optional)
Y
59
DGND
49
Figure 22. Typical Application: VIN = 19.5 V, IOUT = 32 A, LED, External MOSFETs
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9 Power Supply Recommendations
The DLPA4000 operates over a range of 16 V to 20 V input voltage supply or battery. The power supply design
may require additional bulk capacitance. Additional bulk capacitance helps avoid insufficient supply current due
to line drop, ringing due to trace inductance at the VIN terminals, or supply peak current limitations, When the
interaction of the ceramic input capacitors causes ringing, an electrolytic or tantalum type capacitor may be
needed for damping.
Evaluate the bulk capacitance required so that the input voltage remains within the specified range long enough
for a proper fast shutdown to occur for the VOFFSET, VRESET, and VBIAS supplies. The shutdown period
begins when the input voltage goes below the programmable UVLO threshold. Shutdown occurs when the
external power suddenly discontinues.
9.1 Power-Up and Power-Down Timing
The power-up and power-down sequence ensures a correct operation of the DLPA4000 and to prevent damage
to the DMD. The DLPA4000 controls the correct sequencing of the DMD_VRESET, DMD_VBIAS, and
DMD_VOFFSET to ensure a reliable operation of the DMD.
The general startup sequence of the supplies is described earlier in Supply and Monitoring. The power-up
sequence of the high voltage DMD lines is especially important in order not to damage the DMD. A too large
delta voltage between DMD_VBIAS and DMD_VOFFSET could cause the damage and should therefore be
prevented.
After the device pulls PROJ_ON high, the DMD buck converters and LDOs energize (PWR1, PWR2, PWR3,
PWR4) the DMD high voltage lines (HV) sequentially enable. At the end of this sequence, the DLPA4000
becomes fully powered and ready for projection.
1. DMD_VOFFSET
2. delay
3. VOFS_STATE_DURATION (register 0x10) DMD_VBIAS
4. delay
5. VBIAS_STATE_DURATION (register 0x11) DMD_VRESET
For shutdown there are two sequences, normal shutdown (Figure 23) and a fault fast shutdown used in case a
fault occurs (Figure 24).
This is the shutdown sequence during normal mode operation
1. 25-ms delay
2. PROJ_ON pin goes low
3. DMD_VBIAS and DMD_VRESET stop regulating
4. 10 ms delay
5. DMD_OFFSET stops regulating
6. RESET_Z goes low
7. 1 ms delay
8. all three voltages discharge
9. all other supplies de-energized
10. INT_Z remains high
INT_Z remains high during the shutdown sequence because no fault occurred. During the power-down sequence
the device makes sure the HV levels do not violate the DMD specifications on these three lines. For this it is
important to select the capacitors such that CVOFFSET is equal to CVRESET and CVBIAS is ≤ CVOFFSET, CVBIAS.
The fast shutdown mode (Figure 24) sequence starts in case a fault occurs (INT_Z is pulled low), for instance
due to overheating.
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Power-Up and Power-Down Timing (continued)
Use register 0x01 to enable and disable fast shutdown mode (FAST_SHUTDOWN_EN). Fast shutdown mode is
the default mode. After the fault occurs, regulation of DMD_VBIAS and DMD_VRESET is stopped. The time
(delay) between fault and stop of regulation can be controlled via register 0x0F (VBIAS/VRST_DELAY). The
delay can be selected between 4 µs and approximately 1.1 ms, where the default is approximately 540 µs. A
defined delay-time after the regulation stopped, all three high voltages lines are discharged and RESET_Z is
pulled low. The delay can be controlled via register 0x0F (VOFS/VRESETZ_DELAY). Delay can be selected
between 4 µs and approximately1.1ms. The default is ~4 µs. Finally the internal DMD_EN signal is pulled low.
The DLPA4000 device remains in standby state until the fault resolves. The device restarts then the fault
resolves. The restart sequence begins when the device energizes the PWR_3 pin and follows the same steps as
the regular startup sequence (see Figure 24). select capacitors so that CVOFFSET is equal to CVRESET and CVBIAS is
≤ CVOFFSET, CVBIAS. This selection criteria ensures proper discharge timing and discharge levels.
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Power-Up and Power-Down Timing (continued)
VIN
Initiated by DLPC
Initiated by DLPC
PROJ_ON
SUP_5P0V
SUP_2P5V
D_CORE_EN
(INTERNAL_SINGAL)
PWR_5P5V
DRST_5P5V
ILLUM_5P5V
PWR_1
PWR_2
PWR_3
PWR_4
PWR_6
INT_Z
RESET_Z
Initiated by DLPC
via SPI
DMD_EN
(INTERNAL_SIGNAL)
STOP
REGULATING
DMD_VOFFSET
STOP
REGULATING
DMD_VBIAS
DMD_VRESET
STOP
REGULATING
Note:
Arrows indicate sequence of events automatically controlled by digital state machine. Other events are initiated under
SPI control.
Figure 23. Power Sequence Normal Shutdown Mode
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Power-Up and Power-Down Timing (continued)
VIN
Initiated by DLPC
PROJ_ON
SUP_5P0V
SUP_2P5V
D_CORE_EN
(INTERNAL_SINGAL)
PWR_5P5V
DRST_5P5V
ILLUM_5P5V
PWR_1
Supplies are not turned off,
Unless PROJ_ON is set low
PWR_2
PWR_3
PWR_4
PWR_6
Initiated by
FAULT
INT_Z
RESET_Z
Initiated by
DLPC via SPI
DMD_EN
(INTERNAL_SIGNAL)
DMD_VOFFSET
DMD_VBIAS
DMD_VRESET
Note:
Arrows indicate sequence of events automatically controlled by digital state machine. Other events are initiated under
SPI control.
Figure 24. Power Sequence Fault Fast Shutdown Mode
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10 Layout
10.1 Layout Guidelines
Make sure to consider high peak currents and high switching frequencies when designing the layout to avoid
instability and EMI problems.
• Use wide and short traces for high-current paths and for high-current return power ground paths.
• Place, the input capacitor, output capacitor, and the inductor of the DMD HV regulator as close as possible to
the DLPA4000 device.
• Separate the ground traces and connect them together at a central point undermeath the device package.
This design minimizes ground noise coupling between different buck converters
• The recommended value for the DMD capacitors is 1 µF for VRST and VOFS, 470 nF for VBIAS. The
inductor value is 10 µH.
The currents of the buck converters are highest near pins VIN, SWITCH and PGND (). The voltage at the pins
VIN, PGND and FB are DC voltages. the SWITCH pin voltage a value betweent eh value of the VIN viltage and
teh PGND voltage. The red line in Figure 25 indicates the current flow when the MOSFET between pin 52 and
pin 53 is closed. The blue line indicates the current flow when the MOSFET between pin 53 and pin 54 is closed.
The buck converter paths carry the highest currents. Make sure the buck converter paths are as short as
possible.
For the LDO DMD, it is recommended to use a 1-µF, 16-V capacitor on the input and a 10-µF, 6.3-V capacitor on
the output of the LDO assuming a battery voltage of 12 V.
For LDO bucks, it is recommended to use a 1-µF, 16-V capacitor on the input and a 1-µF, 6.3-V capacitor on the
output of the LDO.
50 PWR7_BOOST
52 PWR7_VIN
General
Purpose
53 PWR7_SWITCH
BUCK3
100n
6.3V
SYSPWR
2x10µ
16V
RSN7 CSN7
3.3µH
3A
51 PWR7_FB
Regulated Output
Voltage
2x22µ
6.3V
Low_ESR
54 PWR7_PGND
Figure 25. High AC Current Paths in a Buck Converter
The trace to the VIN pin in this design has high AC currents that prevents voltage drop across the trace. Make
sure the trace to the VIN pin has low resistance.
Place the decoupling capacitors as close to the VIN pin as possible.
The SWITCH pin alternates connection to the VIN pin or GND. The SWITCH pin voltage waveform is square with
an amplitude equal to VIN. The SWITCH pin voltage containing high frequencies. This situation causes EMI
problems unless properly mitigated. Reduce EMI by creating a snubber network (RSN7 and CSN7) Place the
resistor and capacitor at the SWITCH pin to prevent or suppress unwanted high-frequency ringing during
switching.
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Layout Guidelines (continued)
The PGND pin sinks high current. Connect the PGND pin to a star ground point so that it does not interfere with
other ground connections.
The FB pin is the sense connection for the regulated DC output voltage. No current flows through the FB pin.
The device compares the voltage on the FB pin with the internal reference voltage. This comparison controls the
loop. Make the FB connection at the load so that the I-R drop does not affect the sensed voltage.
10.1.1 LED Driver
The layout of the LED driver area of the PCB affects the performance of the DLPA4000 as an LED driver.
Incorrect layout can cause high-current voltage ringing. High-current rining damages electronics and causes
visible effects on the illumination.
10.1.1.1 PowerBlock Gate Control Isolation
Design trace 15nH to |--------------------- Keep this trace < 5nH ----------------------|
ILLUM_HS_DRV
D20 and R45
near DLPA4000
Minimize
Trace Length
D23
TGR1
R49
ILLUM_A_BOOST
R70
TGR2
TG1
TG2
R43 near DLPA4000
GND
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000000000000000000000000000000000000000000000000000
000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00000000000000000000000000000000000000000000000000000
C183
~5nH dedicated trace
C170
ILLUM_A_SW
D25
~5nH dedicated trace
C184
WtZ><^
KŶdŽƉ>ĂLJĞƌ
R42 near DLPA4000
R68
PGND1 PGND2
BG1
D24
C185
D21 and R46
near DLPA4000
R69
BG2
D29
ILLUM_LS_DRV
R71
C186
Design trace 15nH to |--------------------- Keep this trace < 5nH ----------------------|
Figure 26. DLPA4000 Illumination Bottom Layout
The two power blocks Synchronous Buck NexFET™ Power Block MOSFET Pair in the reference design
connects Q11 and Q12 in parallel. This design feature reduces current loss and power loss in the application.
Place the two power blocks close to each other. Implement the gate control isolation topologies in the reference
design to prevent feedback and ringing on the gate control line from the DLPA4000.
Place a single-shared ILLUM_HS_DRV trace from the PMIC to the two separate gate filtering and isolation
component sets (D23, R70, and C183) and (D25, R71, and C184). Place each set close to the the power block
high-side MOSFET pins. Minimize the ILLUM_HS_DRV route length. Minimize coupling to other routes.
Terminate the ILLUM_HS_DRV from the PMIC in a T-junction. Make sure this termination is very close to the
power blocks. Minimize the route beyond the T-junction that goes between the two filter and isolation component
sets. Make sure the routing inductance is 5 nH or less on the trace between the filter and isolation sets.
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Place D23, R70, and C183 very close together and underneath Q11 with the goal of minimizing the net
connecting D23, R70, C183, and the high-side MOSFET pin (Q11 Pin 3). The high-side MOSFET return pin (Q11
Pin 4) requires an independent 5-nH trace before merging with the Top Gate Return of Q12. Make sure that the
merged Top Gate Return trace has an inductance of 15 nH on the return to the R-C filter (C170 and R49) near
the DLPA4000 device. The isolation components near the Top Gate pin of Q12 (D25, R71, and C184) must
follow the same requirements as those isolating Q11 (D23, R70, and C183). The inductance of the high-side
illumination driver net connecting D25 to D23 must maintain a value below 5 nH. The high-side MOSFET return
pin (Q12 pin 4) requires a 5-nH independent trace before merging with the Q11 Top Gate Return path back to
the RC filter.
Route a single-shared ILLUM_LS_DRV trace from the PMIC to the two separate gate filtering and isolation
component sets (D29, R68, and C185) and (D24, R69, and C186). Place each component set close to the power
block low-side MOSSFET pins. Minimize the ILLUM_LS_DRV route length. Minimize coupling the
ILLUM_LS_DRV route to other routes. Terminate the ILLUM_LS_DRV from the PMIC in a T-junction. Make sure
this termination is very close to the power blocks. Minimize the route beyond the T-junction that goes between
the two filter and isolation component sets. Make sure the routing inductance is 5 nH or less on the trace
between the filter and isolation sets)
Make sure the inductance of the trace from D21 and R46 to D29 is as close to 15 nH as possible. Place D29,
C185, and R68 directly underneath Q11 to minimize trace impedance. Similarly, place D24, C186, and R69
underneath and as close as possible to Q12. Make sure the inductance of the trace connecting D24 to D29 is
less than 15 nH.
10.1.1.2 VIN to PowerBlocks
Create a dedicated VIN path (in addition to an internal VIN plane) directly to the power blocks (Q11 and Q12) on
the top layer of the board. Use 2 oz. (7 mm or larger) copper in the layout for VIN, the dedicated VIN return
(bottom layer), and all other high-power nets. Tie the two planes at the input power connector only. This
connection significantly reduces the 32-A switching noise from the power blocks on the internal VIN plane for the
rest of the DLPA4000 integrated switching power supplies.
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Layout Guidelines (continued)
Figure 27. Dedicated VIN Path
10.1.1.3 Return Current from LEDs and RSense
The RSENSE resistor (R72) senses the LED current. Connect the RLIM_K_1 and RLIM_K_2 lines close to the top
side of the measurement resistor to accurately measure the LED current. Connect the RLIM_BOT_K_1 and
RLIM_BOT_K_2 lines close to the bottom side of the measurement resistor to accurately measure the LED
current.
The switched LED current flows through the RLIM resistor and the RSENSE resistor. Design a low-ohmic ground
connection from the RSENSE resistor that retuns to the input voltage connector. Make sure the PGND return has a
dedicated plane on the top layer that returns to the connector. However, the PGND top layer must have vias
placed from inside the top layer to the internal PGND plane. Make sure the PGND vias underneath the power
block are compliant with the power block layout thermal guidelines. See CSD87350Q5D data sheet for
guidelines..
Make sure the designer considers the entire return path for current from the LED connector through the RLIM
resistor plane and the RSENSE resistor (R72) during layout. Any obstacles between the LED connectors and the
PGND on the input power connector can cause power reduction. Similar obstacles can cause possible image
artifacts due to slow LED turn-on times. See the reference design for a suggested placement and plane sizes.
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Layout Guidelines (continued)
Figure 28. Current Return Path
10.1.1.4 RC Snubber
Proper operation requires snubber networks. The switching frequency can vary from several hundreds of kHz to
frequencies in the MHz range. To switch currents from zero to several amperes requires only nanoseconds,
equivalent to even much higher frequencies. EMI can occur when ringing occurs on the edges. This ringing can
have higher amplitude and frequency than the switching voltage. All DLP4000 buck converters require a snubber
network to prevent ringing. The snubber network comprises a resistor and a capacitor in series.
Place an R-C snubber network (C32 and R56) to reduce ringing on the switching node. Place the capacitor on
top of a large plane for the switching node directly next to the PGND plane. This resistor placement eliminates
the gap between the switching node and the PGND plane used by the PowerBlocks.
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Layout Guidelines (continued)
Figure 29. RC Snubber Layout
10.1.1.5 Capacitor Choice
Be aware of the voltage coefficient of the decoupling capacitors. Physically undersized ceramic capacitors (with
respect to the capacitance value to physical size ratio) experiences a large reduction in capacitance. Depending
on the VIN voltage chosen and the voltage rating of the capacitors, physically undersized capacitors can
experience up to a 90% reduction in capacitance, leading to insufficient decoupling.
Choose decoupling capacitors (C17 and C119) with a value of 0.1 µF and a size of 0402. Place the decoupling
capacitors as close as possible to the power block VIN pins. Even an increased distance as small as 1 mm in
compared to the reference design can cause a large increase in voltage ringing amplitude. Because the parasitic
inductance of the route combined with the effective inductance of the capacitor affects the switching node, select
capacitors with a higher SRF rating. Place the VIN decoupling capacitors on the top layer very close to the power
blocks to minimize parasitic inductance. Place the 10-µF decoupling capacitors (C18, C114, C115, C116, C117,
and C118) near the power blocks, They do not need to be as close as the 0.1-µF capacitors.
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Layout Guidelines (continued)
10.1.2 General Purpose Buck 2
Use short traces. Separate individual power grounds to avoid ground shift problems. Ground shift problems occur
when ground currents of different buck converters interfere. High currents flow through the inductor (L7) and the
output capacitors (C130, C131).Make the traces to and from inductor and capacitors as short as possible to
avoid losses due to trace resistance. Use high-quality capacitors with a low ESR value to minimize losses in the
capacitors and to maintain an acceptable amount of voltage ripple.
The next paragraph explains how to place and connect components near PWR6 Buck converter which are those
component connected to pins 62, 63, 64, 65, and 66.
Connect the supply voltage i to pin 64 with sufficient copper to make it stable and of low resistance. Use multiple
vias to the ground layer to connect pin 62 to ground. Use multiple layers create low resistive paths. Make sure
the ground connection of the output capacitors and the ground connection of the DLPA4000 (pin 62) are close
together. Connect both points using a wide trace. All buck converters in the layout use a separated ground trace
to their respective ground connection on the DLPA4000. All these ground connections are connected together on
the ground plane below the DLPA4000 package.
Figure 30 shows the position of the converter inductor and the accompanying capacitors (L7, C130, and C131)
positioned as close as possible to pin 62 and pin 64 using the thickest traces that are feasible. Make these
ground connections by using multiple vias to the ground layer to ensure a low-resistance path.
Figure 30. General Purpose Buck Layout
10.1.3 SPI Connections
The SPI interface comprises several digital lines and the SPI supply. Communication errors can occur if interface
lines are not routed properly. Prevent interference on the SPI lines by placing noisy and interfering sources away
from the interface.
Prevent noise by routing the SPI ground line with the digital lines to the respective pins as much as possible.
Connect the SPI interface with a separate ground connection to the DGND pin of the DLPA4000 device. This
design style prevents ground noise between SPI ground references of DLPA4000 and DLPC due to the high
current in the system.
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Layout Guidelines (continued)
CLK
MISO
MOSI
SS_Z
ŽŶƚƌŽůůĞƌ
^W/
/ŶƚĞƌĨĂĐĞ SPI_GND
DLPA4000
GND
VIN
-
VGND-DROP +
I
DGND
DLPA4000 PCB
Figure 31. SPI Connections
Separate interfering sources from the interface lines. For example, high-current lines such as those near the
PWR_7 pin and the SPI_CLK pin are too close, false clock pulses and communication errors can occur.
10.1.4 RLIM Routing
The resistor RLIM senses the LED current. Connect the RLIM _K_1 and RLIM _K_2 lines close to the high-side of
measurement resistor RLIM to accurately measure the LED current. Connect the RLIM_BOT_K_1 pin and the
RLIM_BOT_K_2 pin close to the high-side of measurement resistor RLIM.
The switched LED current flows through the RLIM resistor. Use a low-ohmic ground connection for RLIM .
10.1.5 LED Connection
Large switched currents flow through the wiring from the external RGB switches to the LEDs. Consider these two
specifications to optimize the LED-to-RGB switches wiring layout:
1. wiring resistancce, RSERIES
2. wiring inductance, LSERIES
Figure 32 shows the parasitic series impedances.
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Layout Guidelines (continued)
VLED
RSERIES
CDECOUPLE
LSERIES
SW
VRLIM
Close to
VLED, RLIM
RLIM
Figure 32. Parasitic Inductance (LSeries) and Resistance (Rseries) in Series with LED
Currents up to 32 A can flow through the wires connecting the LEDs to the RGB switches. The layout can cause
noticeable dissipation. Every 10 mΩ of series resistances implies a parasitic power dissipation of 5 W for a 32 A
(avg) LED current . This dissipation can cause an increase in PCB temperature, and more importantly,
deterioration of overall system efficiency.
The wiring resistance may impact the control dynamics of the LED current. The LED current control loop includes
the routing resistance. The LED voltage (VLED) controlls the LED current. Use Equation 15 to calculate the total
differential resistance of a path RSERIES.
¿ILED =
rLED + R series
¿VLED
+ R ON SW
P
,Q,R
+ R LIM
where
•
•
•
•
•
ΔILED is the LED current variation
ΔVLED is a small change in VLED
rLED is the differential resistance of the LED
Ron_SW_P,Q,R the on-resistance of the strobe decoder switch
LSERIES is ignored
(15)
Equation 15 ignores LSERIES because realistic values are usually sufficiently low to cause any noticeable impact
on the dynamics
All differential resistance values range from about 4 mΩ to several hundreds of mΩ. Applications can yield a
series resistance of 100 mΩ if the layout guidelines are not followed. Make sure the application series resistance
is <10 mΩ.
The series inductance plays an important role when considering the switched nature of the LED current. the
current switches through R,G and B LEDs quickly. The turn-off time is significantly fast. A current of 32 A goes to
0 A in 50 ns. This speed causes a voltage spike of approximately 1 V for every 5 nH of parasitic inductance.
Minimize the series inductance of the LED wiring by designing an application that has these features:
• Short wires
• Thick wires or multiple parallel wires
• Small enclosed area of the forward and return current path
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Layout Guidelines (continued)
Use a diode when the application cannot be designed to yield a sufficiently low inductance. Use a Zener diode to
clamp the drain voltage of the RGB switch so that it remains below the absolute maximum rating. Choose a
clamping voltage between the maximum expected VLED and the absolute maximum rating. Make sure the
clamping voltage has sufficient margin relative to the minimum and maximum voltage.
10.2 Layout Example
Figure 33 shows an example of a proper buck converter layout. It shows the routing and placing of the
components near the DLPA4000 for optimal performance. A register sets the output voltage of the converters
used by the DLPA4000. The DLPA4000 uses the feedback pin to compare the output voltage with an internal
setpoint.
Figure 33. Practical Layout Example
Use short traces. Separate individual power grounds to avoid ground shift problems. Ground shift problems occur
when ground currents of different buck converters interfere. High currents flow through the inductor (L7) and the
output capacitors (C130, C131).Make the traces to and from inductor and capacitors as short as possible to
avoid losses due to trace resistance. Use high-quality capacitors with a low ESR value to minimize losses in the
capacitors and to maintain an acceptable amount of voltage ripple.
In order to prevent problems with switching high currents at high frequencies the layout is very critical and
snubber networks are advisable. The switching frequency can vary from several hundreds of kHz to frequencies
in the MHz range. Keep in mind that it takes only nanoseconds to switch currents from zero to several amperes
which is equivalent to even much higher frequencies. Those switching moments causes EMI problems if not
properly handled, especially when ringing occurs on the edges, which can have higher amplitude and frequency
as the switching voltage itself. To prevent this ringing the DLPA4000 buck converters all need a snubber
network, consisting of a resistor and a capacitor in series implemented on the board to reduce this unwanted
behavior. The snubber network is in this case placed on the bottom-side of the PCB (thus not visible here)
connected to the trace of L9 routing to the switch node.
In order to make more clear what plays a role when laying out a buck converter, this paragraph explains the
connections and placing of the parts around the buck converter connected to the pins 50-54. The supply voltage
is connected to pin 52 which is laid out on a mid layer (purple colored) and is connected to this pin using 3 via’s
to make sure a stable and low resistance connection is made. The decoupling is done by capacitor C43 & C44
visible on the bottom right of Figure 33 and the connection to the supply and the ground layer is done using
multiple vias. The ground connection on pin 54 is also done using multiple vias to the ground layer which is
visible as the blue areas in Figure 33. By using different layers it is possible to create low resistive paths. Ideally
the ground connection of the output capacitors and the ground connection of the part (pin54) should be close
together. The layout connects both points together using a wide trace on the bottom layer (blue colored area)
which is also suitable to bring both connections together. All buck converters in the layout have the same layout
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Layout Example (continued)
structure and use a separated ground trace to their respective ground connection on the part. All these ground
connections are connected together on the ground plane below the DLPA4000 itself. shows the position of the
converter inductor and its accompanying capacitors (L9 & C46, C47) as close as possible positioned to the pins
51 and 53 using traces as thick as possible. The ground connections of these capacitors is done using multiple
via’s to the ground layer to ensure a low resistance path.
10.3 Thermal Considerations
Integrated circuits in low-profile and fine-pitch surface-mount packages typically require special attention to
power dissipation. Many different system-dependent issues affect the power dissipation limits of individual
component. These issues include
• thermal coupling
• airflow
• added heat sinks
• added convection surfaces
• other heat-generating components
These three basic approaches enhance thermal performance.
• Improve the heat sinking capability of the PCB
• Increase heat sink capability on top of the package
• Increase airflow in the system
The DLPA4000 device has efficient power converters. But because the power delivered to the LEDs can be quite
large (more than 50 W in some case) the power dissipation in the DLPA4000 device can be high. Use proper
temperature calculation to minimize power dissipation in the application.
It is important to maintain the junction temperature below the maximum recommended value of 120°C during
operation. Calculate PDISS, to determine the junction temperature of the DLPA4000. PDISS is a summation of all
power dissipation. Use Equation 16 to calculate TJ.
TJ = TA + PDISS × R
JA
where
•
•
TA is the ambient temperature
RθJA is the thermal resistance from junction-to-ambient
(16)
The total power dissipation varies depending on the application specifications. The main variances in the
DLPA4000 circuitry are:
• Buck converters
• LDOs
Use Equation 17 to calculate the dissipation for the buck converter.
Pdiss _ buck
Pin
Pout
§ 1
Pout ¨¨
© Kbuck
·
1¸¸
¹
where
•
•
•
ηBUCK is the efficiency of the buck converter
PIN the power delivered at the input of the buck converter
POUT the power delivered to the load of the buck converter
(17)
shows efficiency for buck converters PWR1, PWR2, PWR5, PWR6, and PWR7.
Buck converters require high power efficiency because they typically handle the highest power levels. Linear
regulators,(for example, LDOs) handle lower power levels. Because the efficiency of an LDO can be relative low,
the related power dissipation can be significant.
Use Equation 18 to calculate the power dissipation of an LDO, PDISS(ldo).
PDISS :ldo ; = :VIN F VOUT ; × ILOAD
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Thermal Considerations (continued)
where
•
•
•
VIN is the input supply voltage
VOUT is the output voltage of the LDO
ILOAD is the load current of the LDO
(18)
Because the voltage decrease over the LDO (VIN – VOUT) can be relative large, a relatively small load current can
yield significant power dissipation in the DLPA4000 device. In this case, consider using one of the general
purpose bucks to have a more power-efficient solition (in other words, a less dissipation solution).
It is important to consider the power dissipation of the LDO that supplies the boost power converter (the LDO
DMD). The boost converter supplies high voltages for the DMD. This voltages are VBIAS, VOFS, VRST.The
maximum simultaneous load current ILOAD(max) for these lines is 10 mA . So, the maximum related power level is
moderate. Use Equation 19 An efficiency rate of 80% for the boost converter, ηBOOST, implies a maximum boost
converter dissipation, PDISS (DMD_boost,MAX).
PDISS @DMD
boost MAX A
= ILOAD :max ; × :VBIAS + VOFS + VRST ; × l
1
DBOOST
1p
räs
(19)
The level of power dissipation of the illumination buck converter this is likely negligible. The term that might count
to the total power dissipation is Pdiss_LDO_DMD. The input current of the DMD boost converter is supplied by this
LDO. In case of an high supply voltage, a non negligible dissipation term is obtained. The worst case load
current for the LDO is given by:
1
ILOAD LDO :max ; =
DBOOST
×
:VBIAS + VOFS + VRST ;
× ILOAD :max ;
VDRST 5P5V
srr •
where
•
the output voltage of the LDO is VDRST_5P5V is 5.5 V
(20)
Dissipation of power in the LDO can be up to 1.5 W for an input supply voltage of 19.5 V. Power dissipation of
1.5 W is a worst case scenario. In most cases the load current of the LDO DMD is significantly less. Make sure
to confirm the LDO current level for the specific application.
The DLPA4000 draws a quiescent current. The power supply voltage does not affect this quiescent current. For
the buck converters the quiescent current is comprised in the efficiency numbers. For the LDOs a quiescent
current on the order of 0.5 mA can be used. For the rest of the DLPA4000 circuitry, not included in the buck
converters or LDOs, a quiescent current on the order of 3 mA applies. Use Equation 21 to estimate dissipation,
Pdiss_DLPA4000 in the DLPA4000 device.
PDISS :DLPS4000 ; = Í PBUCK + Í PLDO
(21)
Use to calculate the maximum ambient temperature,
TA = TJ:max ;F PDISS × R
JA = 120°C
2.5 W × 7°C/W = 102.5°C
(22)
Use to calculate the junction temperature of the DLPA4000 device after you know the dissipated power and the
ambient temperature.
Use Thermal Information to calculate the junction temperature for heat sink configuration and airflow.
TJ = TA + PDISS × R
JA =50°C+4 W × 7°C/W = 78°C
(23)
Use one of these three design features if the combination of ambient temperature and DLPA4000 power
dissipation does not yield an acceptable junction temperature ( <120°C).
1. Use a larger heat sink, which increases airflow, to reduced RθJA,
2. Use lower load current through the internal general purpose buck converters..
3. Use an external general purpose buck converter instead of an internal one. This design reduces power
dissipation in the DLPA4000 device
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11 Device and Documentation Support
11.1 Device Support
11.1.1 Device Nomenclature
DLPA4000
Figure 34. Package Marking DLPA4000 (Top View)
11.2 Receiving Notification of Documentation Updates
To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper
right corner, click on Alert me to register and receive a weekly digest of any product information that has
changed. For change details, review the revision history included in any revised document.
11.3 Community Resources
The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective
contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of
Use.
TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration
among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help
solve problems with fellow engineers.
Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and
contact information for technical support.
11.4 Trademarks
E2E is a trademark of Texas Instruments.
DLP is a registered trademark of Texas Instruments.
11.5 Electrostatic Discharge Caution
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
11.6 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
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12 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
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12.1 Package Option Addendum
12.1.1 Packaging Information
Orderable Device
(1)
(2)
(3)
(4)
(5)
Status
(1)
Package
Type
Package
Drawing
Pins
Package
Qty
Eco Plan
(2)
Lead/Ball Finish
MSL Peak Temp
(3)
Op Temp
(°C)
Device Marking (4) (5)
DLPA4000DPFD
ACTIVE
HTQFP
PFD
100
90
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
0 to 70
DLPA4000
DLPA4000DPFDR
ACTIVE
HTQFP
PFD
100
1000
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
0 to 70
DLPA4000
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PRE_PROD Unannounced device, not in production, not available for mass market, nor on the web, samples not available.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
space
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest
availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the
requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified
lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used
between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by
weight in homogeneous material)
space
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
space
There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device
space
Multiple Device markings will be inside parentheses. Only on Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a
continuation of the previous line and the two combined represent the entire Device Marking for that device.
Important Information and Disclaimer: The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief
on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third
parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for
release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Copyright © 2018, Texas Instruments Incorporated
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73
PACKAGE OPTION ADDENDUM
www.ti.com
2-Jun-2018
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
Lead/Ball Finish
MSL Peak Temp
(2)
(6)
(3)
Op Temp (°C)
Device Marking
(4/5)
DLPA4000PFD
ACTIVE
HTQFP
PFD
100
90
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
0 to 70
DLPA4000
DLPA4000PFDR
PREVIEW
HTQFP
PFD
100
1000
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
0 to 70
DLPA4000
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based
flame retardants must also meet the <=1000ppm threshold requirement.
(3)
MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4)
There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5)
Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6)
Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish
value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 1
Samples
PACKAGE OPTION ADDENDUM
www.ti.com
2-Jun-2018
Addendum-Page 2
IMPORTANT NOTICE
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