GUI for evaluation module (EVM)
Data sheet
LM36922
- 1% Matched Current Sinks Across (Process,
Voltage, Temp) - 3% Current Sink Accuracy Across (Process,
Voltage, Temp) - 11-Bit Dimming Resolution
- Up to 91.6% Solution Efficiency
- Drives from One to Two Parallel LED Strings at up
to 28 V - PWM Dimming Input
- I2C Programmable
- Selectable 500-kHz and 1-MHz Switching
Frequency with Optional –12% shift - Auto Switch Frequency Mode (250 kHz, 500 kHz,
1 MHz) - Four Configurable Overvoltage Protection
Thresholds (17 V, 21 V, 25 V, 29 V) - Four Configurable Overcurrent Protection
Thresholds (750 mA, 1000 mA, 1250 mA, 1500
mA) - Thermal Shutdown Protection
The LM36922 is an ultra-compact, highly efficient, two string white-LED driver designed for LCD display backlighting. The device can power up to 8 series LEDs at up to 25 mA per string. An adaptive current regulation method allows for different LED voltages in each string while maintaining current regulation.
The LED current is adjusted via an I2C interface or through a logic level PWM input. The PWM duty cycle is internally sensed and mapped to an 11-bit current thus allowing for a wide range of PWM frequencies and noise-free operation.
The device operates over the 2.5-V to 5.5-V input voltage range and –40°C to 85°C temperature range.
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Technical documentation
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View all 7 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM36922 Highly Efficient Dual-String White LED Driver datasheet | PDF | HTML | 13 May 2015 |
| Application note | How to use the LM3697 Device to Design a Backlight Unit in a Smartphone | PDF | HTML | 15 Apr 2021 | |
| White paper | Common LED Functions and LED Driver Design Considerations | 21 Sep 2020 | ||
| Application note | Analog PWM Dimming in White-LED Drivers | 21 Dec 2016 | ||
| Application note | Inductor Selection in Boost Converters for LCD Backlight Applications | 24 Oct 2016 | ||
| Application note | Schottky Diode Selection in Asynchronous Boost Converters | 06 Sep 2016 | ||
| EVM User's guide | Using the LM36922EVM Evaluation Module | 13 May 2015 |
Design & development
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Evaluation board
LM36922EVM — LM36922 Highly Efficient Dual-String White LED Driver Evaluation Module
The LM36922 Evaluation Module (LM36922EVM) is designed to fully evaluate the LM36922 Highly Efficient Dual-String White LED backlight driver. The LM36922EVM consists of the LM36922 with 2p8s white LED strings with jumpers to enable 1p2s through 2p8s led string configurations. LED string (...)
User guide: PDF
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
| Package | Pins | Download |
|---|---|---|
| DSBGA (YFF) | 12 | View options |
Ordering & quality
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