Data Sheet
Charge-Pump, Parallel Backlight Driver with Image Content PWM Input
ADP8870
FEATURES
Charge pump with autom...
Data Sheet
Charge-Pump, Parallel Backlight Driver with Image Content PWM Input
ADP8870
FEATURES
Charge pump with automatic gain selection of 1×, 1.5×, and 2× for maximum efficiency
Two high accuracy (±5%) photo
transistor inputs for automated ambient light sensing (ALS)
5 programmable ambient light-sensing zones for optimal backlight power savings
Independent ALS control of D7, for automated response of keypad lighting to ambient light levels
PWM input can be used for content adaptive brightness control (CABC) of any, or all, of the LEDs
PWM input scales the LED output current 7 independent, programmable LED drivers
6 drivers capable of 30 mA (maximum) 1 driver capable of 60 mA (maximum) Programmable maximum current limit (128 levels) Standby mode for <1 μA current consumption 16 programmable fade-in and fade-out times (0.1 sec to 5.5 sec) with choice of square or cubic rates Fading override I2C-compatible interface for all programming Dedicated reset pin and built-in power-on reset (POR) Short-circuit, overvoltage, and overtemperature protection Internal soft start to limit inrush currents Input-to-output isolation during faults or shutdown Operates down to VIN = 2.5 V, with undervoltage lockout (UVLO) at 2.0 V. Available in a small, 2.15 mm × 2.36 mm × 0.6 mm wafer level chip scale package (WLCSP) or a 4 mm × 4 mm × 0.75 mm lead frame chip scale package (LFCSP)
APPLICATIONS
Mobile display backlighting Mobile phone keypad backlighting RGB LED lighting LED indication Gener...