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Design LP55231
SNOSCR5D – MARCH 2013 – REVISED DECEMBER 2016 LP55231 Nine-Channel RGB, White-LED Driver With Internal Program Memory
and Integrated Charge Pump -WQFN
1 Features 3 Description 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. 1 Three Independent Program Execution Engines, 9
Programmable Outputs With 25.5-mA Full-Scale
Current, 8-Bit Current Setting Resolution and
12-Bit PWM Control Resolution
Adaptive High-Efficiency 1Г—/1.5Г— 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 …
