datasheet for INDICE0002 by Indice Semiconductor

datasheet for INDICE0002 by Indice Semiconductor
Datasheet - DS0002
Indice Semiconductor Pty Ltd
MR16 LED Driver IC – INDICE0002
with Power and Active Temperature Management
KEY FEATURES
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1
Input voltage range: 12 V DC / 12 V AC.
Input frequency range from DC to 300kHz AC.
Output power scalable to 20W with the correct selection of switching silicon and
magnetic parts.
Adjustable LED output voltage from 3 to 29V 1.
Programmable over-temperature shut down, from 60 to 92 °C.
Clock-less, asynchronous operation of primary switching reduces EMI test
compliance issues.
Compatible with 12V AC magnetic and electronic transformers.
Compatible with 12V AC magnetic transformers with leading edge dimmer circuits1.
Compatible with 12V AC electronic transformers with trailing edge dimmer circuits1.
Small module size allows an easy integration into final products.
Efficiency (Measured in default configuration from MR16 input pins to LED output).
o Single stage: > 85%.
o Dual stage: > 80% (Primary and secondary outputs used).
Higher output voltages possible with increased voltage rating on certain parts.
DISCLAIMER
All intellectual, design, manufacturing, reproduction, use and sale rights regarding this document are expressly reserved by Indice
Semiconductor Pty Ltd.. These materials and all of the contents contained herein are provided “AS IS” and Indice Semiconductor Pty
Ltd neither assumes nor accepts any liability for any errors or omissions contained in these materials.
Datasheet – DS0002 Version: 0.4
Page 1/16
LED Driver Chip v2.0 – INDICE0002
Table of Contents
1 Introduction ................................................................................................................................................... 31
1.1 Overview ................................................................................................................................................. 31
1.2 Chip Benefits .......................................................................................................................................... 31
1.3 System Benefits ..................................................................................................................................... 31
1.4 System Features .................................................................................................................................... 41
1.5 Suggested Applications ........................................................................................................................ 41
1.6 Indice Semiconductor Pty Ltd Support Contacts ............................................................................... 41
1.7 Device Pin Out ........................................................................................................................................ 51
1.8 Basic System Diagram .......................................................................................................................... 61
2 Operating Conditions ................................................................................................................................... 71
2.1 Absolute Maximum Ratings .................................................................................................................. 71
2.2 Recommended Operational Conditions .............................................................................................. 71
2.3 Input Pin Operation ................................................................................................................................ 71
2.4 Output Pin Operation ............................................................................................................................. 81
3 Chip Functionality ........................................................................................................................................ 91
3.1 Primary Drive .......................................................................................................................................... 91
3.2 Power Select Input ................................................................................................................................. 91
3.3 Power Control Input ............................................................................................................................... 91
3.4 Secondary Drive ................................................................................................................................... 101
3.5 Temperature Adjustment Output........................................................................................................ 101
3.6 Temperature Level Select Input.......................................................................................................... 101
3.7 Power Normalisation Input ................................................................................................................. 111
3.8 Transformer Select Logic Input .......................................................................................................... 111
3.9 Transformer Select Logic Output ....................................................................................................... 121
3.10 Reset ................................................................................................................................................... 121
4 Chip Packaging ........................................................................................................................................... 131
5 PCB Footprint ............................................................................................................................................. 141
6 Revision Control ......................................................................................................................................... 161
Datasheet – DS0002
LED Driver Chip v2.0 – INDICE0002
Page 2/16
Version: 0.4
1 Introduction
1.1 Overview
The Indice Light Emitting Diode (LED) Driver Chip offers a fast development path to deliver a product to
market quickly for MR16 low voltage lighting. Unique to Indice is our direct halogen replacement compatibility
technology which takes the headaches out of the product development by providing a fully functional
reference design. The chip allows for the production of module that offers manufacturers a compact and
flexible high power source, extremely efficient driver for low voltage LED lighting. The module is compatible
with most dimmers and standard 12V AC electronic transformers and magnetic (iron core) transformers.
These modules are suitable for driving high wattage LEDs for general and task lighting. Features include
high speed, asynchronous control scheme, over-temperature shut down, and configurable output for
matching LED voltage and power requirements.
1.2 Chip Benefits
The Indice LED Driver Chip is a leading edge silicon device that has the following benefits:
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Small Package: The control chip is supplied in a 16 pin QFN package to minimize consumed board
space.
Low Voltage Supply: The controller chip operates on a stable 3.3V supply.
Low Power: The control chip implements power saving features which significantly reduce its power
consumption during normal operation.
Temperature Select: The temperature select pin allows engineers to customize the target
temperature for normal operation. With safety shut down level selected according to the selected
operating point.
Output Power Select: The output power select pin allows engineers to customize the maximum
desired output power before thermal management is engaged.
Power Normalisation: Allows system power draw on varying supplies to be normalized to a more
consistent value.
Asynchronous Drive: The controller chip switches asynchronously, which helps to reduce ElectroMagnetic Interference (EMI) by spreading emissions over a large frequency band.
1.3 System Benefits
Indice LED Driver Chip is also available in customized control modules. The controller technology allows the
direct replacement of halogen downlights removing the need to rewire the building. Licensees of the Indice
controller technology will benefit from customized control modules with the following unique benefits:
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1
1
Dimmable: Our control chip provides dimming with most existing dimmers globally .
Transformer compatibility: Our control system is compatible with both electronic and magnetic
1
transformers globally .
High power factor: 0.8 to 0.9 on most transformers meeting the US Energy Star requirements.
EMC Compliance: Meets Class B requirements for CISPR 15/22, FCC Part 15 and EN55022.
Active temperature management: Our controller continuously monitors the operating temperature
of the lamp adjusting power accordingly which maximises LED life and brightness. In the event the
ambient temperature reaches extremes, the controller will safely shut down the lamp. The lamp will
turn back on when the ambient temperature drops below the set threshold.
Active Power Management: Our control chip actively monitors the current through the LED
ensuring that it runs within the manufacturer’s specification.
Refer to the Indice dimmer and transformer compatibility chart for complete details.
Datasheet – DS0002
LED Driver Chip v2.0 – INDICE0002
Page 3/16
Version: 0.4
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Extensive Testing: Indice has carried out extensive testing of its control technology on dimmers
1
and transformers from across the globe .
Turn Key Designs that are certified are ready for manufacture (Note: Reference designs provided
under license).
Full PCB Support on PCB design and iterative changes to support production improvements.
Full Component Support: On alternative sourcing of components to reduce cost and lead times
(This involves a detailed engineering process of thoroughly testing and validating parts).
Full Certification Support: On certification for all major regions (Australia, US, Europe).
Full Access: To design improvements and enhancements.
1.4 System Features
The customised control modules have the following features:
•
•
•
•
•
•
•
•
•
•
•
Input voltage range: 12 V DC / 12 V AC.
Input frequency range from DC to 300kHz AC.
Output power scalable to 20W with the correct selection of switching silicon and magnetic parts.
2
Adjustable LED output voltage from 3 to 29V .
Programmable over-temperature shut down, from 60 to 92 °C.
Clock-less, asynchronous operation of primary switching reduces EMI test compliance issues.
Compatible with 12V AC magnetic and electronic transformers.
Compatible with 12V AC magnetic transformers with leading edge dimmer circuits1.
1
Compatible with 12V AC electronic transformers with trailing edge dimmer circuits .
Small module size allows an easy integration into final products.
Efficiency (Measured in default configuration from MR16 input pins to LED output).
o Single stage: > 85%.
o Dual stage: > 80% (Primary and secondary outputs used).
1.5 Suggested Applications
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Direct replacement for low voltage halogen downlights in commercial, residential and industrial
lighting.
Outdoor lighting controller for low voltage systems.
Industrial LED controller for high reliability applications.
Emergency lighting systems.
Any other low voltage lighting system.
1.6 Indice Semiconductor Pty Ltd Support Contacts
The following key contacts should be used for any additional correspondence and queries in response to this
document.
1
2
Email
[email protected]
Phone
+61 3 9831 7400 (9am – 5pm, Mon – Fri, UTC+10:00)
Refer to the Indice dimmer and transformer compatibility chart for complete details.
Higher output voltages possible with increased voltage rating on certain parts.
Datasheet – DS0002
LED Driver Chip v2.0 – INDICE0002
Page 4/16
Version: 0.4
1.7 Device Pin Out
Below in Figure 1 and Table 1 are de
details on the pin out and pin functions for the Indic
dice LED Driver Chip.
Figure 1: Top view of Indice LED Driver
Dr
Chip QFN 16 package, with pins labelled. Dotted
D
Lines indicate pins
on bottom of chip.
Pin
Number
I/O
A/D
PWR_SEL_INPUT
1
I
A
Control power select input pin.
PWR_CTRL_INPUT
2
I
A
Power control input pin.
TEMP_SEL_INPUT
3
I
A
Temperature level select pin.
PWR_NORM_INPUT
4
I
D
Power normalisation input pin.
SEC_DRIVE_OUTPUT
5
O
D
Secondary drive output pin.
TRANS_SEL_INPUT
6
I
D
Automatic transformer select inp
nput pin.
TRANS_SEL_OUTPUT
7
O
D
Automatic transformer select out
utput pin.
PRI_DRIVE_OUTPUT
8
O
D
Primary drive output pin.
RESET
9
I
D
Reset input pin.
NC
10
-
-
Pin not connected. (Reserved for
fo later expansion.)
NC
11
-
-
Pin not connected. (Reserved for
fo later expansion.)
TEMP_ADJ_OUTPUT
12
O
D
Temperature adjustment outputt pin.
GND
13
-
-
Ground reference.
GND
14
-
-
Ground reference.
VCC
15
-
-
3.3 V supply voltage.
VCC
16
-
-
3.3 V supply voltage.
GND
17
-
-
Ground reference.
Name
Descriptio
tion
Table 1: Pin functions of Indice LED
LE Driver Chip. I/O column indicates either I – Inp
nput or O – Output. A/D
column
n indicates either A – Analogue or D – Digital.
Datasheet – DS0002
LED Driver Chip v2.0 – INDICE0002
Page 5/16
Version: 0.4
1.8 Basic System Diagram
A system diagram depicting the IND
DICE0002 chip being used in a simplified LED driv
river is presented in
Figure 2. This system shows a prima
ary booster stage followed by a secondary buck stage,
s
although the
INDICE0002 chip can be used to dri
rive other similar stages to achieve controlled LED
D driving.
Figure 2: System diagram showing
ng a simplified example of the INDICE0002 chip used
us within a low voltage
LED driver.
Datasheet – DS0002
LED Driver Chip v2.0 – INDICE0002
Page 6/16
Version: 0.4
2 Operating Conditions
2.1 Absolute Maximum Ratings
Subjecting the Indice LED Driver chip to any conditions beyond those listed in this section may cause
permanent damage to the device. These are maximum condition ratings only. Exposure to the absolute
maximum rated conditions for long periods can adversely affect device reliability. Proper operation of the
device under any conditions, other than those indicated in the “Recommended Operational Conditions”
section, is not implied. Absolute maximum ratings of the Indice LED Driver Chip are included in Table 2.
GND pin to VCC pin voltage.
-0.3 V to 4.1 V
Any other pin voltage. (Referenced to GND pin voltage.)
Storage temperature range. TSTORAGE
(1)
-0.3 V to VCC + 0.3 V
.
-55 °C to 150 °C
(1) Higher temperatures can be applied during board soldering according to current JEDEC J-STD-020
standards specification. Peak reflow temperatures should not exceed those classified on the device
packaging.
Table 2: Absolute maximum ratings of the Indice LED Driver Chip.
2.2 Recommended Operational Conditions
Recommended operational conditions for the Indice LED Driver Chip are given in Table 3.
GND pin voltage.
0V
VCC pin voltage. (Referenced to GND pin voltage.)
2.2 V to 3.6 V
Operating ambient free air temperature. TA
-40 °C to 85 °C
Typical current draw
3mA
Table 3: Recommended operational conditions of the Indice LED Driver Chip.
2.3 Input Pin Operation
The measured operational characteristics of the Indice LED Driver Chip input pins are presented below, in
Table 4. Leakage data on all high impedance input pins is given in Table 5. All of these values are measured
over recommended supply voltages and operating ambient free air temperatures (unless otherwise stated.)
Parameter
Test Conditions
MIN
TYP
MAX
Unit
Rising edge input threshold voltage. VIT+
VCC = 3 V.
1.35
2.25
V
Falling edge input threshold voltage. VIT-
VCC = 3 V.
0.75
1.65
V
Input voltage hysteresis. VHYS = (VIT+ - VIT-)
VCC = 3 V.
0.3
1
V
Input capacitance. CIN
GND or VCC applied to pin.
5
pF
Table 4: Input pin operation of the Indice LED Driver Chip.
Parameter
Input leakage current. ILEAK
Test Conditions
VCC = 3 V
(1)
.
MIN
TYP
MAX
Unit
±50
nA
(1) Leakage current measured with pin attached to GND or VCC. Each pin measured individually.
Table 5: High impedance input pin leakage operation of the Indice LED Driver Chip.
Datasheet – DS0002
LED Driver Chip v2.0 – INDICE0002
Page 7/16
Version: 0.4
2.4 Output Pin Operation
The measured operational characteristics of the Indice LED Driver Chip output pins are presented below, in
Table 6. These values are measured over recommended supply voltages and operating ambient free air
temperatures (unless otherwise stated.)
Parameter
Test Conditions
High output voltage VOH
VCC = 3 V, IMAX = 6 mA delivered.
Low output voltage VOL
VCC = 3 V, IMAX = 6 mA drawn.
MIN
TYP
MAX
Unit
VCC – 0.3
V
GND + 0.3
V
Table 6: Output pin operation of the Indice LED Driver Chip.
Datasheet – DS0002
LED Driver Chip v2.0 – INDICE0002
Page 8/16
Version: 0.4
3 Chip Functionality
3.1 Primary Drive
The primary drive signal, PRI_DRIVE
VE_OUTPUT, is used in conjunction with the powe
er select and power
control inputs, PWR_SEL_INPUT an
and PWR_CTRL_INPUT respectively, to provide closed
c
loop control of the
output power.
In terms of the basic control system,, shown below in Figure 3, the PRI_DRIVE_OUTP
TPUT signal can be
considered as the control logic outpu
put into the system. The control logic itself is imple
lemented within the
Indice LED Driver Chip, along with some
s
conditioning of the reference and sensor sig
ignals before
comparison.
ol system. The figure shows the basic transfer bloc
ocks and the comparison
Figure 3: Basic closed loop control
of reference and sensor
or signals, VREF and VSENSOR, to produce the errorr signal,
s
VERR.
The result of the conditioning, compa
parison and control logic is a digital drive line outt o
of
PRI_DRIVE_OUTPUT. This digitall d
drive can be used to drive the primary switching element
e
of an LED
power converter circuit.
The controller assumes that this con
ontroller output is coupled to the output power thou
ugh the system as
shown in Figure 3, such that outputti
tting a high level will increase the output power, while
wh outputting a low
level will decrease the output power.
er. This relationship must hold in order to achieve cclosed loop control of
the system.
3.2 Power Select Input
The power select input line, PWR_S
SEL_INPUT, is used to set the level that the contro
trol system is seeking to
achieve on the power control inputt line,
li
PWR_CTRL_INPUT. Control is then achieve
ed by varying the primary
drive signal, PRI_DRIVE_OUTPUT,, in accordance with changes to both input signals
ls.
With respect to the basic control sys
ystem, shown previously in Figure 3, PWR_SEL_IN
INPUT can be
considered more generally as the re
reference signal used for the control comparison.
The signal undergoes some conditio
tioning before comparison, so control system calcu
ulations should not be
carried out based solely on raw sign
nal comparisons.
3.3 Power Control Input
The power control input line, PWR_C
_CTRL_INPUT, is used as an input point for outpu
ut sensor information,
closing the control loop and allowing
ng for stable output power to the load LEDs.
PWR_CTRL_INPUT can be thought
ht of as the sensor signal used in the basic control
ol system shown above in
Figure 3.
The signal undergoes some conditio
tioning before comparison, so control system calcu
ulations should not be
carried out based solely on raw sign
nal comparisons.
Datasheet – DS0002
LED Driver Chip v2.0 – INDICE0002
Page 9/16
Version: 0.4
3.4 Secondary Drive
The secondary drive signal, SEC_DRIVE_OUTPUT, is a 50% duty cycle drive signal at a fixed frequency.
The secondary drive output frequency is generated by an internal oscillator and is always enabled. The
signal timing has some inherent error and as such the typical values for this drive frequency and the error
tolerance are shown in Table 7.
Parameter
Test Conditions
MIN
TYP
MAX
Sec drive frequency. FSEC
VCC = 3 V.
Sec drive tolerance over temperature.
VCC = 3 V, TA = 0 – 85 °C.
-3
±0.5
+3
%
Sec drive tolerance over VCC.
VCC = 2.7 – 3.6 V, TA = 30 °C
-3
±2
+3
%
-6
±3
+6
%
VCC = 2.7 – 3.6 V,
Sec drive tolerance overall.
TA = 0 – 85 °C.
1
Unit
MHz
Table 7: Input pin operation of the Indice LED Driver Chip.
3.5 Temperature Adjustment Output
The temperature adjustment output, TEMP_ADJ_OUTPUT, is a varying duty cycle output, at approximately
3.9 kHz. The duty cycle of this waveform adjusts according to internal temperature control logic operating
based on an internal temperature sensor. This signal can be used as an adjustment to the overall system
power in order to maintain a constant control chip temperature. This is particularly useful if the control
module and chip have tight thermal coupling to the output LEDs, because the signal then allows for the
output power to be varied in order to keep the output LEDs at a suitable running temperature.
TEMP_ADJ_OUTPUT starts at 100% duty cycle. Given a high enough system power draw this will begin to
raise the system temperature towards the selected temperature level.
nd
The system then implements a 2 order z-transform to target the desired temperature level. As the
temperature of the system nears the selected temperature setting TEMP_ADJ_OUTPUT will begin to reduce
the duty cycle to control the temperature. Continued raising temperature above the selected temperature
setting will result in TEMP_ADJ_OUTPUT dropping to a 0% duty cycle.
If the temperature continues to rise then the controller will shut off all power into the system to prevent a
critical system failure. This thermal shut off will occur when the internal chip temperature reaches 6.66 °C
above the selected temperature level. The controller will remain in this state until the internal chip
temperature again falls to the target level.
3.6 Temperature Level Select Input
The temperature level select input, TEMP_SEL_INPUT, is an analogue input used for setting the target
temperature level for the temperature control system. The input takes an analogue signal from 0 V to 1.5V
and quantises this into 16 V levels. These 16 levels then correspond to 1.66 °C steps levels from 62.0 °C to
86.9 °C, inclusive.
In order to set a particular temperature level it is best to input a voltage between the 0.1 V quantisation
levels. The input signal will then be rounded down to the nearest quantisation level by the internal chip logic.
Included in Table 8 below are the recommended voltage settings and their associated temperature set point.
Datasheet – DS0002
LED Driver Chip v2.0 – INDICE0002
Page 10/16
Version: 0.4
Level
Recommended
Voltage
Resulting
Temperature
0
0.5 V
62 °C
1
0.15 V
63.66 °C
2
0.25 V
65.32 °C
3
0.35 V
66.98 °C
4
0.45 V
68.64 °C
5
0.55 V
70.30 °C
6
0.65 V
71.96 °C
7
0.75 V
73.62 °C
8
0.85 V
75.28 °C
9
0.95 V
76.94 °C
10
1.05 V
78.60 °C
11
1.15 V
80.26 °C
12
1.25 V
81.92 °C
13
1.35 V
83.58 °C
14
1.45 V
85.24 °C
15
1.5 V
86.90 °C
Table 8: Various target temperature settings. For each setting the recommended input voltage is given and
the resulting target temperature.
3.7 Power Normalisation Input
The power normalisation input, PWR_NORM_INPUT, is used to interface with the Indice LED Driver Chip’s
power normalisation logic.
The power normalisation logic is designed to monitor a conditioned version of the rectified supply voltage
and uses this information to normalise the maximum power of various supply transformers. Using this logic
the power draw on magnetic transformers and electronic transformers with very small firing angles is
normalised to a standardised amount.
The normalisation process is carried out by biasing the TEMP_ADJ_OUTPUT output. This biasing is
undertaken at a slow rate of 2 Hz and can take up to 1 min to complete the adjustment process.
The power normalisation logic can be disabled by connecting the PWR_NORM_INPUT pin to GND with a 47
k1 pull-down.
3.8 Transformer Select Logic Input
The transformer select logic input line, TRANS_SEL_INPUT, is used to interface with the Indice LED Driver
Chip’s transformer selection logic.
The transformer detection logic is designed to monitor a conditioned 12 V transformer supply voltage signal.
The internal logic will use information in this signal to determine if the system is connected to a magnetic or
electronic supply transformer. The transformer select logic output line, TRANS_SEL_OUTPUT, will then be
changed to indicate the transformer type detected.
Datasheet – DS0002
LED Driver Chip v2.0 – INDICE0002
Page 11/16
Version: 0.4
3.9 Transformer Select Logic Output
The transformer select logic output line, TRANS_SEL_OUTPUT, is the output from the transformer selection
logic block. This block uses the signal connected to TRANS_SEL_INPUT to attempt to determine the type of
the 12 V supply transformer. This allows the overall system to then adjust its operation to compensate for the
transformer operation.
TRANS_SEL_OUTPUT starts at a default low level of VOL, which indicates an electronic transformer. This is
because typically electronic transformers have strict stall conditions, so it can be useful to change the system
operation to ensure stable operation of electronic transformers immediately when connected to the supply.
The transformer select logic then monitors TRANS_SEL_INPUT and determines, from this conditioned
supply voltage signal, if it is indeed connected to an electronic transformer. If typical electronic transformer
operation is not detected soon after start up, then the system will switch to indicating the connection of a
magnetic transformer. This is indicated by an output high, VOH, on the TRANS_SEL_OUTPUT.
Similarly the TRANS_SEL_OUTPUT will switch to indicating the presence of an electronic transformer if a
typical electronic transformer signal is presented to TRANS_SEL_INPUT during operation.
There can be some error in the transformer selection logic, particularly if the input signal is of very low
voltage level. This can happen when dimming to very low levels. A signal such as this will cause the logic to
think it is connected to a magnetic transformer source.
3.10 Reset
The reset line, RESET, is an active low line that allows for the resetting of the Indice LED Driver Chip. This is
useful for clearing and resetting the temperature level settings, as these settings are measured from the
TEMP_SEL_INPUT and stored at system start-up.
It is advised that RESET be tied to VCC, by a 47 k1 pull-up, during normal operation.
A voltage level of <VIT- on RESET will cause a reset event.
Datasheet – DS0002
LED Driver Chip v2.0 – INDICE0002
Page 12/16
Version: 0.4
4 Chip Packaging
Below in Figure 4 are the dimensions of the QFN16 package used for the Indice LED Driver Chip.
Figure 4: Package details. All noted dimensions in mm. Not to scale.
Datasheet – DS0002
LED Driver Chip v2.0 – INDICE0002
Page 13/16
Version: 0.4
5 PCB Footprint
The suggested dimensions for PCB footprint and solder paste stencils are presented in Figure 5 and Figure
6 respectively.
Figure 5: Suggested PCB footprint. All noted dimensions in mm. Not to scale.
Datasheet – DS0002
LED Driver Chip v2.0 – INDICE0002
Page 14/16
Version: 0.4
Figure 6: Suggested solder paste stencil. All noted dimensions in mm. Not to scale.
Datasheet – DS0002
LED Driver Chip v2.0 – INDICE0002
Page 15/16
Version: 0.4
6 Revision Control
Version
Date
Details
0.1
07/12/2011
Document creation, from INDICE0001 datasheet.
0.2
15/02/2012
Moved revision control to bottom of document. Removed internal personal
names from document. Revised contact information. Added system
diagram.
0.3
01/03/2012
New front cover format.
0.4
01/07/2014
Modified of Indice logo and contact details
Datasheet – DS0002
LED Driver Chip v2.0 – INDICE0002
Page 16/16
Version: 0.4
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