Texas Instruments LM36274
The LM36274 is an integrated four-channel WLED driver and LCD bias supply. The ultra-compact size, high efficiency, high level of integration, and programmability allow the LM36274 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 four parallel LED strings with up to 29-V total output voltage.| Part No. | LM36274 |
|---|---|
| Datasheet | LM36274 Download |
| Manufacturer |  Texas Instruments |
| Description | Four-Channel LCD Backlight Driver |
| Buy | Stock & Price |
FEATURES
●1 Drives up to Four 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 24 LEDs● Smart Phones
● Tablets and Gaming Tablets
● Home Automation Panels space space LLCM VBATT Simplified Schematic DSCH LBL BL_SW BL_SW CBL_OUT IN BL_OUT LCM_SW LED1 SCL SDA PWM HWEN LCM_EN1 LCM_EN2 LM36274 LED2 LED3 LED4 C+ CLCM_OUT VPOS VNEG Up to 8 LEDs / String CFLY CLCM CVPOS CVNEG BL_GND CP_GND LCM_GND AGND Copyright © 2017, Texas Instruments Incorporated 3
DESCRIPTION
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.
