LP55231 Overview
The LP55231 is a 9-channel LED driver designed to produce lighting effects for mobile devices. A highefficiency charge pump enables LED driving over full Li-Ion battery voltage range. The device is equipped with an internal program memory, which allows operation without processor control.
LP55231 Key Features
- 1 Three Independent Program Execution Engines, 9 Programmable Outputs With 25.5-mA Full-Scale Current, 8-Bit Current Set
- Adaptive High-Efficiency 1×/1.5× Fractional Charge Pump
- Efficiency up to 94%
- LED Drive Efficiency Up to 93%
- Charge Pump With Soft Start
- Overcurrent and Short-Circuit Protection
- Built-in LED Test
- 200-nA Typical Standby Current
- Automatic Power Save Mode; IVDD = 10 µA
- Two-Wire I2C-patible Control Interface