LM36272

Product Folder Order Now Technical Documents Tools & Software Support & Community LM36272 SNVSAJ7D – FEBRUARY 2016 – REVISED MARCH 2018 LM36272 Two-Channel LCD Backlight Driver With Integrated Bias Power 1 Features 1 Drives up to Two Parallel White LED Strings (29-V Maximum VOUT) 11-Bit Exponential and Linear Dimming Control PWM and I2C Brightness Control Backlight Operation With 4.7-µH to 15-µH Inductor Backlight and LCD Bias Efficiency up to 92% Programmable LCD Bias Voltages (±4 V to ±6.5 V With 50-mV resolution) With Up to 80-mA per Output 0.2% Matched LED Current From 60 µA to 30 mA 1% Accurate LED Current From 60 µA to 30 mA 2.7-V to 5-V Input Voltage Range 2 Applications LCD Panels With up to 16 LEDs Smart Phones Tablets and Gaming Tablets Home Automation Panels space space Simplified Schematic DSCH LBL CBL_OUT BL_SW BL_SW LLCM VBATT IN BL_OUT LCM_SW SCL LED1 LED2 SDA PWM LM36272 C+ C- Up to 8 LEDs / String CFLY HWEN LCM_EN1 LCM_EN2 LCM_OUT VPOS VNEG CLCM CVPOS CVNEG BL_GND CP_GND LCM_GND AGND Copyright © 2017, Texas Instruments Incorporated 3 Description 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 w...