The LM36272 is an integrated two-channel WLED driver and LCD bias supply. The ultra-compact size, high efficiency, high level of integration, and programmability allow the LM36272 to address a variety of applications without the need for hardware changes while minimizing the overall solution area.
The backlight boost provides the power to bias two parallel LED strings with up to 29-V total output voltage. The 11-bit LED current is programmable via the I2C bus and/or controlled via a logic level PWM input from 60 µA to 30 mA. Each LED string can be independently enabled or disabled to provide zone dimming capabilities. The backlight boost can be operated efficiently with an inductance range from 4.7 µH to 15 µH, allowing for efficiency and solution size optimization.
The LCD bias boost provides the power to both a positive LDO and an inverting charge pump. Both positive and negative bias supplies have programmable output voltages of ±4 V to ±6.5 V with 50-mV steps and up to ±80 mA of current capability. An auto-sequencing feature provides a programmed delay from positive to negative bias activation, with additional programmable voltage slew rate control. Two wake-up modes allow both bias outputs to be controlled with a single external signal and stay active while consuming very low quiescent current.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | LM36272 Two-Channel LCD Backlight Driver With Integrated Bias Power datasheet (Rev. D) | PDF | HTML | Mar 2, 2018 |
| White paper | Common LED Functions and LED Driver Design Considerations | Sep 21, 2020 | ||
| Application note | How to Use LM3627x to Design DPU in Smartphones | May 7, 2020 | ||
| Application note | LM3627x Layout Guidelines | Oct 12, 2017 | ||
| Application note | Analog PWM Dimming in White-LED Drivers | Dec 21, 2016 | ||
| Application note | Inductor Selection in Boost Converters for LCD Backlight Applications | Oct 24, 2016 | ||
| Application note | Auto-Frequency Mode Setting for Improved Boost Efficiency in White LED Backlight | Oct 14, 2016 | ||
| Application note | Schottky Diode Selection in Asynchronous Boost Converters | Sep 6, 2016 |
For additional terms or required resources, click any title below to view the detail page where available.
The Linux driver supports the LMU(Lighting Management Unit) devices for smartphone handsets. The Linux driver supports communication through the I2C bus and interfaces with various sub-systems.
Available in Linux Main line: No
Available through git.ti.com: (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| DSBGA (YFF) | 24 | Ultra Librarian |
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