ADD5211
FEATURES
White LED driver based on an inductive boost controller Wide input voltage range: 4.5 V to 40 V Adaptive output voltage to minimize power dissipation Adjustable operating frequency: 200 k Hz to 1.2 MHz Programmable UVLO Programmable soft start time for boost converter Programmable external MOSFET switching rising/falling time Drives up to 4 LED current sinks with internal MOSFETs Brightness control with PWM input Adjustable LED current: 40 m A up to 200 m A Headroom control to maximize efficiency LED dimming frequency: up to 25 k Hz 1000:1 PWM dimming at 300 Hz Open drain fault indicator LED open and LED short fault protection Thermal shutdown Undervoltage lockout 24-lead, 4 mm × 4 mm LFCSP
Four-String, White LED Driver for LCD Backlight Applications ADD5211
GENERAL DESCRIPTION
The ADD5211 is a 4 channel, white LED driver for backlight applications based on high efficiency, current mode, step-up converter technology. The boost controller drives an external MOSFET switch for...
