Texas Instruments | Brightness Turbo TPS92641 Application Note | Application notes | Texas Instruments Brightness Turbo TPS92641 Application Note Application notes

Texas Instruments Brightness Turbo TPS92641 Application Note Application notes
Application Report
SNVA725 – January 2015
DLP® Pico™ Brightness Turbo and TPS92641 Design
Guide
Red Yen, Tony Lee ........................................................................................................... FAE/Taiwan
ABSTRACT
This application note presents Brightness Turbo, a method to boost the system brightness on LED-based
projectors. Brightness Turbo is able to raise the system brightness further. A hardware logic is introduced
to support Brightness Turbo, the projector running in either high-brightness mode or saturated-color mode.
The Brightness Turbo logic is built with the TI TPS92641 LED driver. The second half of the application
note introduces the TPS92641 as the discrete LED driver in DLP® products and includes the schematic,
O-scope performance measurement, and design guidelines for mainstream LED products.
The application note is recommended on the DPP6401 DLP® Pico™ product with PWM driver control
interface.
4
Contents
Brightness Turbo Introduction .............................................................................................. 2
Brightness Turbo Design ................................................................................................... 4
2.1
Hardware Logic ..................................................................................................... 4
2.2
The DLP® Composer Settings .................................................................................... 7
TPS92641 on DLP® Pico™ Products .................................................................................... 8
3.1
Introduction .......................................................................................................... 8
3.2
TPS92641 Board Description ..................................................................................... 8
3.3
Setting the LED Current and Analog Dimming ................................................................. 8
3.4
PWM Dimming ...................................................................................................... 8
3.5
Schematic ............................................................................................................ 9
3.6
Layout ............................................................................................................... 11
3.7
Bill of Materials (BOM) ............................................................................................ 13
Brightness Turbo + TPS92641 Measurement Data ................................................................... 14
1
Optical Layout of DLP® LED Projector
1
2
3
List of Figures
2
3
4
5
6
7
8
9
10
11
12
13
.................................................................................. 2
Conventional LED Driving Scheme in 60 Hz Video ..................................................................... 3
Brightness Turbo Slightly Turned on all LEDs at all Times ............................................................ 3
IADJ Control of Brightness Turbo ......................................................................................... 4
Logic Chart of Control over IADJ ......................................................................................... 4
UDIM Control on Green LED .............................................................................................. 5
Logic Chart of Brightness Turbo Inputs/Outputs ........................................................................ 5
Brightness Turbo Circuit for R, G, B Channels .......................................................................... 6
Original Color Gamut When Brightness Turbo Disabled ............................................................... 7
Smaller Color Gamut When Brightness Turbo Enabled ................................................................ 7
TPS92641 Red LED Driver Schematic ................................................................................... 9
TPS92641 Green LED Driver Schematic ................................................................................. 9
TPS92641 Blue LED Driver Schematic ................................................................................. 10
Pico is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
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1
Brightness Turbo Introduction
14
15
16
17
www.ti.com
....................................................................................
Top View ....................................................................................................................
Bottom View.................................................................................................................
PCB Top View With Component .........................................................................................
Brightness Turbo Logics Schematic
10
11
11
12
List of Tables
1
.............................................................................................................
1
Bill of Materials
2
Test Waveforms ............................................................................................................ 14
13
3
Power vs Brightness Measurement ...................................................................................... 14
Brightness Turbo Introduction
A single DMD chip, DLP® LED projector is known as using a color-sequential method to produce colors
that turn Red, Green, or Blue LED on at a time within the whole frame time. In pure LED illumination
systems, Red, Green, and Blue LEDs have to use the dichroic mirrors with appropriate optical layout and
form the same incident light cone to the DMD as shown in Figure 1. The conventional LED driving scheme
either drives LED at full power or completely off as the example in Figure 2.
In order to boost the system brightness, Brightness Turbo is a new LED driving concept that slightly turns
on the other two LEDs while they are originally completely off. For example, a given red LED time, green
and blue LEDs are turned on with 15% of their full power, and the same rule applies to green and blue
LED sequence time as shown in Figure 3. Therefore, all three LEDs are turned on while Brightness Turbo
is enabled. Because all LEDs are turned on at all times, the price of gaining the extra brightness is the
color gamut. The amount the color desaturation depends on how much brightness boost created by
Brightness Turbo.
There are two significant advantages when Brightness Turbo is implemented in an LED-based DPP6401
projector:
• The projector can claim higher brightness specification and still keep the original color gamut
specification in the other display mode. The control logic is introduced in Section 2.
• Typically, LED has higher efficiency when operating at a lower forward current. Brightness Turbo takes
the LED nature to boost brightness with better power versus brightness trade.
DMD
Dichroic Mirror
Red LED
Blue LED
Green LED
Figure 1. Optical Layout of DLP® LED Projector
2
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Total
Red LED
Green LED
Blue LED
1/60 s
Figure 2. Conventional LED Driving Scheme in 60 Hz Video
Total
Red LED
Green LED
Blue LED
1/60 s
Figure 3. Brightness Turbo Slightly Turned on all LEDs at all Times
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Brightness Turbo Design
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2
Brightness Turbo Design
2.1
Hardware Logic
Brightness Turbo logic is realized on the TI TPS92641 LED driver and the logic circuit was made and
proven effectively on TPS92641+ Brightness Turbo EVM. The logic supports the features to control
Brightness Turbo enabled/disabled, and the brightness boost ratio.
The TPS92641 provides two input control signals to manipulate LED current level and on/off sequence.
IADJ (pin 6) is an analog input that controls LED current level. High-level input voltage with higher LED
current. UDIM (pin 3) is a fast switch of LED on and off. High indicates LED on, low indicates LED off.
Figure 4 shows the logic of Brightness Turbo over IADJ. The Brightness Turbo SW is the switch that turn
on or off Brightness Turbo. Two analog multiplexers (MUX) are used with normal open and normal close
input ports. The MUX at TPS92641 end is controlled by LED strobe which is sent from DPP6401. The
Strobe at the status of high switches the MUX output to PWM which is the LED current setting for this
particular color sequence time. While Strobe is at low status, the MUX outputs the signal from the other
MUX which is controlled by Brightness Turbo SW. If Brightness Turbo SW is off, then convey the low
signal to LED driver that indicate no brightness boost. On the other hand, convey the voltage which is
decided by two cascaded resisters to determine how much LED current is used to boost the brightness
when Brightness Turbo SW is on. Figure 5 is the logic chart of the control signal over IADJ. Two steps of
LED current levels when Brightness Turbo is turned on. In design implementation, the same logic is
applied for red, green, and blue TPS92641 LED drivers.
Figure 4. IADJ Control of Brightness Turbo
Brightness Turbo
Strobe
LED Current (IADJ)
Figure 5. Logic Chart of Control over IADJ
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Since IADJ is an analog control signal, the LED occasionally may not completely turn off due to analog
noise when Brightness Turbo is off. Figure 6 shows the additional logic circuit on green channel to
reinforce and provides faster response time over UDIM. When Brightness Turbo is on, the green LED is
turned on as long as red, green, or blue Strobe is high. UDIM follows green Strobe that fast switch the
LED on/off while Brightness Turbo is off. The same logic circuit applies to red and blue UDIM.
Figure 6. UDIM Control on Green LED
The detail logic chart and the interaction of Brightness Turbo control signals are shown in Figure 7. Input
signals are Brightness Turbo, R Strobe, G Strobe, and B Strobe.
Output signals are Red IADJ, Red UDIM, Green IADJ, Green UDIM, Blue IADJ, and Blue UDIM. The
complete circuit of Brightness Turbo for R, G, and B channels is shown in Figure 8.
Brightness Turbo
R Strobe
G Strobe
B Strobe
Red IADJ
Green IADJ
Blue IADJ
Red UDIM
Green UDIM
Blue UDIM
Figure 7. Logic Chart of Brightness Turbo Inputs/Outputs
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Figure 8. Brightness Turbo Circuit for R, G, B Channels
6
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2.2
The DLP® Composer Settings
The Brightness Turbo implementation not only requires the hardware circuit modification, but also software
setting. As Brightness Turbo shrinks the color gamut in different display modes, the Composer project
supports the different color gamut in different sequence groups. The user has to update the R, G, and B
color points depending on the boost level. Using incorrect color points Composer may result in nonsmooth gray ramp, and contour.
Figure 9. Original Color Gamut When Brightness Turbo Disabled
Figure 10. Smaller Color Gamut When Brightness Turbo Enabled
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3
TPS92641 on DLP® Pico™ Products
3.1
Introduction
The TPS92641 is a high voltage and synchronous NFET controller for buck current regulators. Output
current regulation is based on valley current-mode operation using on-time control architecture. This
control method eases the loop compensation design and faster transient response. The PWM controller is
operating at up to 1.0 MHz and supports both analog and PWM input signals resulting in exceptional
dimming control range. A linear dimmer between input command and LED current is achieved with true
zero current using a low off-set error amplifier and proprietary PWM dimming logic. Protection features
include cycle-by-cycle current protection, overvoltage protection, and thermal shutdown.
3.2
TPS92641 Board Description
This EVM contains the TPS92641 IC configured as an RGB LED power solution providing three-channel
regulated current output to drive red, green and blue colors with max 20 A. The TS5A3157 IC is
configured as an analog switch for logic of Brightness Turbo functions, and the SN74LVC1G332 IC is
configured as an OR gate while Brightness Turbo is disabled. This application note includes a schematic
diagram, PCB layouts, and a bill of materials to help the end user implement the device in their specific
application.
3.3
Setting the LED Current and Analog Dimming
Average LED current regulation is set by using a sense resistor in-series with the LEDs. The internal erroramplifier regulates the voltage across the sense resistor (VCS) to the IADJ voltage divided by 10. IADJ can
be set to any value up to 2.54 V by connecting it to VREF through a resistor divider for static output
current settings. IADJ can also be used to change the regulation point if connected to a controlled voltage
source or potentiometer to provide analog dimming. The ILED setting is based on Equation 1:
V
ILED = CS
RCS
VCS =
VIADJ
10
(1)
For this application, ADJ has optional functions, the first one is tied to VREF through a resistor divider to
fix the LED current, the second one is tied to TS5A3157 logics for the Brightness Turbo function.
3.4
PWM Dimming
The PWM dimming can be achieved via the UDIM pin and SDIM pin. The UDIM pin can be driven with a
PWM signal which controls the synchronous NFET operation. The brightness of the LEDs can be varied
by modulating the duty cycle (DDIM) of the signal using a Schottky diode with anode connected to UDIM
pin. The SDIM pin is controlled with an external shunt FET PWM dimming. Extremely high dimming range
and linearly is achieved by shunt FET dimming operation with the SDIM and SDRV pin. When higher
frequency and time resolution PWM dimming signal is applied to the SDIM pin, the SDRV pin provides an
inverted signal of the same frequency and duty cycle that can be used to drive the gate of a shunt NFET
directly across the LED load.
For this application, the UDIM pin is tied to TS5A3157 and SN74LVC1G322 logics for faster response and
truly turns off while Brightness Turbo is disabled; UDIM will follow strobe signal to turns on and off the
LED current. SDIM is tied to strobe signal while both Brightness Turbo and UDIM pin functions are
disabled.
8
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3.5
Schematic
Figure 11, Figure 12, and Figure 13 illustrate the TPS92641 Red, Green, and Blue LED Driver
schematics. Figure 14 illustrates the Brightness Turbo logics schematic.
To Connector the Format Board
VCC
VCC
RRV1
10ohm
J3A
CR5
22uF
CR4
22uF
CR3
22uF
SDIM_R
SDIM_G
SDIM_B
R_PWM
G_PWM
B_PWM
R_Strobe
G_Strobe
B_Strobe
ContinueLED
BrightMode
CR2
680uF, 35V
1
CR1
680uF, 35V
TPR2
HG
6
2k
7
RR8
4.02k
RR6
RR7
CR13
CR14
150k
100k
0.1uF
2.2nF
8
VREF
LG
IADJ
CS
D4
D3
D2
D1
8
7
6
5
12
S1
S2
S3
G
TPR8
LG
11
10
QR3-G
RRE1
1.5ohm
CR10
1uF
9
SDRV
RRF1
47k
QR3
CSD17303Q5
RRG11.5ohmQR4-G
RRH1
TPS92641PWP
TPR11
1
2
3
4
1
2
3
4
CR9
0.47uF
DR2
PMEG4010CEH
13
GND
COMP
SDIM
14
17
TPR10
IADJ
VCC
TPR5
LED+R
8
7
6
5
RR5
IADJ_R
BOOST
VOUT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
0R
0R
0R
0R
0R
0R
0R
0R
0R
0R
0R
0R
CON14
LR1 1uH, SER2011-102MLB
LED+R
15
D4
D3
D2
D1
5
UDIM
16
VCC_3.3
QR2
CSD17303Q5
QR4
CSD17303Q5
JR2A
2A
1A
CR11 CR12
S1
S2
S3
G
4
SW
QR2-G
RRD1
47k
22uF 22uF
RED LED
CONN ASY FLEX 2
1
2
3
4
47k
QR5
QR6
1
2
3
4
1
2
3
4
S1
S2
S3
G
RR9
NC
S1
S2
S3
G
D4
D3
D2
D1
8
7
6
5
8
7
6
5
CSD17303Q5 CSD17303Q5
GND
D4
D3
D2
D1
TPR9
VREF
RR4
0
HG
RON
QR1
CSD17303Q5 RRC1
1.5ohm
8
7
6
5
3
DR1
BAS316
TPR7
UDIM
VIN
D4
D3
D2
D1
2
RRB1
47k
S1
S2
S3
G
1
CR8
330pF
UR1
S1
S2
S3
G
RRA1
1.5ohm
TPR4
RON
UDIM_R
8
7
6
5
QR1-G
1
2
3
4
RR3
28k
CR6
1uF
CR7
0.1uF
RR2
18.2k
RR1
200k
D4
D3
D2
D1
JUMPER(10A)
EP
2
J1
RR26
RR27
RR28
RR39
RR40
RR41
RR42
RR43
RR44
RR45
RR46
RR47
LED-R
TPR14
LED-R
RR10
49.9ohm
S+
RR14
1.5ohm
TPR13
SDIM_R
RR15
1.5ohm
RR11
0.02ohm
RR16
0.02ohm
TPR12
SDIM
STPR15
Figure 11. TPS92641 Red LED Driver Schematic
VCC
CG3
22uF
CG4
22uF
CG5
22uF
RGV1
10ohm
4
5
6
IADJ_G
7
RG8
4.02k
RG6
150k
RG7
100k
CG13 CG14
0.1uF 2.2nF
8
UDIM
BOOST
VOUT
VCC
VREF
LG
IADJ
CS
COMP
SDIM
TPG11
GND
GND
SDRV
8
7
6
5
RGB1
47k
16
1
2
3
4
S1
S2
S3
G
D4
D3
D2
D1
8
7
6
5
D4
D3
D2
D1
S1
S2
S3
G
1
2
3
4
SW
17
TPG10
IADJ
HG
RON
QG2
CSD17303Q5
LG1
15
1uH, SER2011-102MLB
LED+G
TPG5
LED+G
14
DG2
13
CG9
0.47uF
PMEG4010CEH
TPG8
LG
12
11
10
1uF
9
CG10
QG3-G
RGE1
1.5ohm
RGF1
47k
8
7
6
5
DG1
BAS316
RG5
2k
UG1
VIN
QG3
QG4-G
CSD17303Q5 RGG1
1.5ohm
D4
D3
D2
D1
TPG7
UDIM
3
0
QG2-G
RGD1
47k
S1
S2
S3
G
RG4
UDIM_G
QG1
CSD17303Q5 RGC1
1.5ohm
8
7
6
5
2
D4
D3
D2
D1
1
S1
S2
S3
G
CG8
330pF
RGA1
1.5ohm
RGH1
47k
1
2
3
4
RG3
28k
TPG4
RON
QG4
JG2A
CSD17303Q5
CG11 CG12
22uF 22uF
2A
1A
GREEN
LED
CONN ASY FLEX 2
TPS92641PWP
8
7
6
5
1
2
3
4
D4
D3
D2
D1
QG5
S1
S2
S3
G
RG9
NC
QG6
S1
S2
S3
G
D4
D3
D2
D1
8
7
6
5
CSD17303Q5 CSD17303Q5
1
2
3
4
TPG9
VREF
QG1-G
RG2
18.2k
EP
RG1
200k
TPG2
HG
CG6
1uF
1
2
3
4
CG7
0.1uF
LED-G
RG10
49.9ohm
S+
TPG13
SDIM_G
TPG14
LED-G
RG14
1.5ohm
RG15
1.5ohm
RG16
0.02ohm
TPG12
SDIM
RG11
0.02ohm
STPG15
Figure 12. TPS92641 Green LED Driver Schematic
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VCC
CB3
22uF
CB4
22uF
CB5
22uF
RBV1
10ohm
TPB2
5
6
IADJ_B
7
RB8
4.02k
RB6
150k
RB7
100k
CB13
0.1uF
CB14
2.2nF
8
VOUT
VCC
VREF
LG
IADJ
CS
COMP
SDIM
GND
SDRV
8
7
6
5
S1
S2
S3
G
1
2
3
4
LB1
1uH, SER2011-102MLB
LED+B
TPB5
LED+B
14
DB2
13
CB9
0.47uF
PMEG4010CEH
12
TPB8
LG
11
RBE11.5ohm
QB3-G
10
CB10
1uF
9
RBF1
QB3
CSD17303Q5 RBG1
1.5ohm
QB4-G
RBH1
47k
17
TPB11
GND
D4
D3
D2
D1
8
7
6
5
1
2
3
4
BOOST
15
1
2
3
4
TPB10
IADJ
UDIM
RBB1
47k
16
QB2
CSD17303Q5
8
7
6
5
4
RB5
2k
SW
D4
D3
D2
D1
DB1
BAS316
TPB7
UDIM
HG
RON
S1
S2
S3
G
RB4
0
QB2-G
8
7
6
5
3
UDIM_B
VIN
D4
D3
D2
D1
2
QB1
CSD17303Q5 RBC1
1.5ohm
RBD1
47k
S1
S2
S3
G
1
CB8
330pF
S1
S2
S3
G
RBA1
1.5ohm
UB1
EP
RB3
28k
TPB4
RON
D4
D3
D2
D1
QB1-G
RB2
18.2k
RB1
200k
TPB9
VREF
HG
CB6
1uF
CB11 CB12
22uF 22uF
47k
2A
1A
BLUE
LED
CONN ASY FLEX 2
QB5
QB6
CSD17303Q5 CSD17303Q5
1
2
3
4
1
2
3
4
S1
S2
S3
G
S1
S2
S3
G
RB9
NC
D4
D3
D2
D1
D4
D3
D2
D1
8
7
6
5
8
7
6
5
TPS92641PWP
JB2A
QB4
CSD17303Q5
1
2
3
4
CB7
0.1uF
LED-B
TPB14
LED-B
RB10
49.9ohm
S+
RB14
1.5ohm
TPB13
SDIM_B
RB15
1.5ohm
RB16
0.02ohm
TPB12
SDIM
RB11
0.02ohm
STPB15
Figure 13. TPS92641 Blue LED Driver Schematic
VCC_3.3
TS5A3157DCK
BrightMode
1
NO
4
R_PWM
NC
TS5A3157DCK
BrightMode
4
IADJ_R
R10
0
TS5A3157DCK
G_PWM
R_Strobe
VCC_3.3
C2
0.33uF
5
1
R3
NC
VCC_3.3
C1
0.33uF
G_PWM_R
R21
1k
VCC_3.3
VCC_3.3
R_PWM_R
R20
1k
COM
GND
3
IN
NC
IN
R8
0~5k
R_PWM_R
COM
GND
3
6
2
6
IN
NC
NO
UDIM_R
R2
0
U6
V+
5
4
2
COM
6
NO
U5
V+
5
1
V+
1
R_Strobe 3
GND
ContinueLED
R9
NC
VCC_3.3
5
VCC_3.3
R7
5k
U2
2
R1
NC
VCC_3.3
TS5A3157DCK
R19
5k
BrightMode
R12
3
NO
G_PWM_R
COM
NC
6
0~5k
3
4
C3
0.33uF
IADJ_G
R14
0
TS5A3157DCK
G_Strobe
B_PWM_R
6
R16
0~5k
1
NO
4
3
COM
NC
IN
COM
NC
U10
TS5A3157DCK
BrightMode
V+
5
NO
IN
3
V+
1
TS5A3157DCK
U9
BrightMode
R17
NC
VCC_3.3
5
VCC_3.3
R15
5k
GND
UDIM_B
R6
0
GND
4
2
IN
6
GND
COM
NC
NC
TS5A3157DCK
2
5
V+
NO
COM
VCC_3.3
U4
2
1
NO
B_PWM_R
R22
1k
R5
NC
VCC_3.3
B_Strobe 3
B_PWM
U8
4
BrightMode
ContinueLED
1
V+
R4
0
R13
NC
VCC_3.3
U7
IN
1
GND
R11
5k
5
BrightMode
6
6
JUMPER
6
NC
UDIM_G
V+
4
GND
COM
IN
SN74LVC1G332DBV
U3
NO
2
G_Strobe 3
2
1
5
VCC_3.3
5
ContinueLED
V+
4
2
J2
Y
GND
C
IN
B
2
A
2
B_Strobe 6
VCC
G_Strobe 3
GND
R_Strobe 1
U1
4
IADJ_B
R18
0
TS5A3157DCK
B_Strobe
Figure 14. Brightness Turbo Logics Schematic
10
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3.6
Layout
Figure 15, Figure 16, and Figure 17 illustrate the PCB layouts.
Figure 15. Top View
Figure 16. Bottom View
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TPS92641 on DLP® Pico™ Products
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Figure 17. PCB Top View With Component
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3.7
Bill of Materials (BOM)
Table 1 lists the bill of materials.
Table 1. Bill of Materials
Qty
ID
Value
Description
Size
Vender
15
CR3, CG3, CB3, CR4, CG4, CB4, CR5,
CG5, CB5 ,CR11, CG11, CB11,CR12,
STD
CG12, CB12
Part Number
22µF
Capacitor, Ceramic
805
STD
6
CR6, CG6, CB6, CR10, CG10, CB10
STD
1µF
Capacitor, Ceramic
603
STD
6
CR7, CG7, CB7, CR13, CG13, CB13
STD
0.1µF
Capacitor, Ceramic
603
STD
3
CR8, CG8, CB8
STD
330pF
Capacitor, Ceramic
603
STD
3
CR9, CG9, CB9
STD
0.47µF
Capacitor, Ceramic
603
STD
3
CR14, CG14, CB14
STD
2.2nF
Capacitor, Ceramic
603
STD
2
CR1, CR2
STD
680µF, 35V
CAP SMD ELECT
SMD
STD
3
C1, C2, C3
STD
0.33µF
Capacitor, Ceramic
603
STD
3
DR1, DG1, DB1
BAS316
VR<100V
Diodes
SC-90
NXP
3
DR2, DG2, DB2
PMEG4010CEH
VR=40V, IF=1A
Schottky
SC-90
NXP
3
JR2, JG2, JB2
STD
CONN ASY FLEX 2
30A Connector
STD
1
J1
JUMPER
10A
10A Jumper
STD
1
J2
JUMPER
2.54 mm Jumper
2.54mm Jumper
STD
1
J3A
CON14
2.54mm connector
14pin 2.54mm connector
STD
3
LR1,LG1,LB1
TMPC1265HP-1R0MG-D
1µH, INDUCTORS
1µH 30A
TAI Tech
18
QR1, QG1, QB1, QR2, QG2, QB2,
QR3, QG3, QB3, QR4, QG4, QB4,
QR5, QG5, QB5, QR6, QG6, QB6
CSD17303Q5
30V N Channel
30V N Channel NexFET
SON
TI
18
RRG1, RRE1, RRC1, RRA1, RGG1,
RGE1, RGC1, RGA1, RBG1, RBE1,
RBC1, RBA1, RR14, RG14, RB14,
RR15, RG15, RB15
STD
1.5Ω
Resistor, Chip, 1/16-W, 1%
603
STD
12
RRH1, RRF1, RRD1, RRB1, RGH1,
RGF1, RGD1, RGB1, RBH1, RBF1,
RBD1, RBB1
STD
47kΩ
Resistor, Chip, 1/16-W, 1%
603
STD
3
RRV1,RGV1,RBV1
STD
10Ω
Resistor, Chip, 1/16-W, 1%
603
STD
3
RR1,RG1,RB1
STD
200kΩ
Resistor, Chip, 1/16-W, 1%
603
STD
3
RR2,RG2,RB2
STD
18.2kΩ
Resistor, Chip, 1/16-W, 1%
603
STD
3
RR3,RG3,RB3
STD
28kΩ
Resistor, Chip, 1/16-W, 1%
603
STD
9
R2, RR4, RG4, RB4, R4, R6, R10, R14,
STD
R18
0Ω
Resistor, Chip, 1/16-W, 1%
603
STD
3
RR5, RG5, RB5
STD
2kΩ
Resistor, Chip, 1/16-W, 1%
603
STD
3
RR6, RG6, RB6
STD
150kΩ
Resistor, Chip, 1/16-W, 1%
603
STD
3
RR7, RG7, RB7
STD
100kΩ
Resistor, Chip, 1/16-W, 1%
603
STD
3
RR8, RG8, RB8
STD
4.02kΩ
Resistor, Chip, 1/16-W, 1%
603
STD
3
RR9, RG9, RB9
STD
NC
Resistor, Chip, 1/16-W, 1%
603
STD
3
RR10, RG10, RB10
STD
49.9Ω
Resistor, Chip, 1/16-W, 1%
603
STD
6
RR11, RG11, RB11, RR16, RG16,
RB16
WSR5R0100FEA
0.02Ω
Res, Power Metal Strip, 2W,
±x%
4527
VISHAY
12
RR26, RR27, RR28, RR39, RR40,
RR41, RR42, RR43, RR44, RR45,
RR46, RR47
STD
0Ω
Resistor, Chip, 1/16-W, 1%
603
STD
6
R1, R3, R5, R9, R13, R17
STD
NC
Resistor, Chip, 1/16-W, 1%
603
STD
4
R7, R11, R15, R19
STD
5kΩ
Resistor, Chip, 1/16-W, 1%
603
STD
3
R8, R12, R16
STD
0~5kΩ
Variable resistor
3
R20, R21, R22
STD
1kΩ
Resistor, Chip, 1/16-W, 1%
603
LED Drivers
TSSOP TI
STD
STD
3
UR1, UG1, UB1
TPS92641PWP
Synchronous buck
controller for LED driver
1
U1
SN74LVC1G332DBV
5.5V
OR Gate
SOT23
TI
9
U2, U3, U4, U5, U6, U7, U8, U9, U10
TS5A3157DCK
10Ω
10 Ω Analog switch
SOT23
TI
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Brightness Turbo + TPS92641 Measurement Data
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Brightness Turbo + TPS92641 Measurement Data
Table 2. Test Waveforms
Without Brightness Turbo
Ch1: Red current
Ch2: Green current
Ch3: Blue current
Red Brightness Turbo
Ch1: Red current
Ch2: Green current
Ch3: Blue current
Green Brightness Turbo
Ch1: Red current
Ch2: Green current
Ch3: Blue current
Blue Brightness Turbo
Ch1: Red current
Ch2: Green current
Ch3: Blue current
Table 3. Power vs Brightness Measurement
14
Brightness Turbo
On
Off
VIN
11.932 V
11.986 V
IIN
3.15 A
2.70 A
32.36 W
P Input (Watt)
37.59 W
Brightness (Lux)
3861
3082
ColorTemp (°K)
6468°K
6293°k
Power Increase (%)
16%
Brightness Increase (%)
25%
DLP® Pico™ Brightness Turbo and TPS92641 Design Guide
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