The LP5527 is a lighting management unit for handheld devices with
I2C compatible control interface. The LP5527 has a step-up DC-DC
converter with high current output, and it drives display and keypad backlights and powers the
camera flash LED. In addition, the DC-DC converter has the output current to power, for example, an
audio amplifier simultaneously. The chip has four 8-bit programmable high-efficiency
constant-current LED drivers and a flash LED driver. Built-in audio synchronization feature allows
the user to synchronize one of the LEDs to audio input.
The LP5527 has an integrated 400-mA flash driver with a safety stop feature and 50-mA
torch mode. An external enable pin is provided for synchronizing the flash with the camera action.
An external software-independent test interface provides a fast way to find a broken path or short
on LED circuits. Very small DSBGA package together with minimum number of external components is a
best fit for handheld devices.