1 Features
1• Audio Synchronization for a Single Fun-Light LED
• Four PWM Controlled RGB LED Drivers
• High-Efficiency Boost DC-DC Converter
• SPI or I2C-Compatible Interface
• Two Addresses in I2C-Compatible Interface
• LED Connectivity Test Through the Serial
Interface

2 Applications
• Cellular Phones
• PDAs, MP3 Players

3 Description
The LP55281 device is a quadruple RGB LED driver
for handheld devices. It can drive 4 RGB LED sets
and a single fun-light LED. The boost DC-DC
converter drives high current loads with high
efficiency. The RGB driver can drive individual color
LEDs or RGB LEDs powered from boost output or
external supply. Built-in audio synchronization feature
allows user to synchronize the fun-light LED to audio
inputs. The flexible SPI or I2C interface allows easy
control of LP55281. A small YZR0036 or YPG0036
package, together with minimum number of external
components, is a best fit for handheld devices. The
LP55281 also has an LED test feature, which can be
used, for example, in production for checking the LED
connections.