AAT2862数据手册.pdf

PRODUCT DATASHEET AAT2862 ChargePumpTM Backlight LED Driver and Multiple LDO Lighting Management Unit General Description Features The AAT2862 is a highly integrated charge pump-based • Input Voltage Range: 2.7V to 5.5V lighting management unit with four linear regulators • Tri-Mode Charge Pump optimized for single-cell lithium-ion/polymer systems. ▪ Drives up to Eight LEDs The charge pump provides power for all LED outputs and ▪ 32 Programmable Backlight Current with Auto-fade multiple LED configurations are available. The LED out- ▪ Settings Ranging From 500μA to 30mA puts can be programmed up to 30mA each and two LED ▪ Drives up to Two Auxiliary LEDs outputs can be programmed up to 60mA each. An I2C ▪ 1MHz Switching Frequency serial digital interface is used to enable, disable, and set ▪ Automatic Soft Start the current to one of 32 levels. Current matching is bet- 2 ▪ I C Selectable Drivers ter than 3% for uniform display brightness, and high • Four Linear Regulators current matching is better than 5% for uniform power ▪ 200mA Output Current dissipation. ▪ 200mV Dropout 2 ▪ I C Programmable Output Voltage from The AAT2862 also offers four high-performance low-