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Features
High Efficiency Programmable 300 mA Magnetic Boost DC-DC converter
2 separately controlled PWM RGB LED drivers with programmable color, brightness, turn on/off slopes and blinking patterns
FLASH function with up to 6 outputs, each up to
120 mA
Functions software controlled through SPI interface
Additional LED on/off and dimming hardware control
Programmable low current Standby mode
Low voltage digital interface down to 1.8V
Space efficient 24-pin LLP package
Description The LP3931 is a RGB LED driver with high current boost DC-DC converter designed for portable wireless applications. It contains
2 sets of RGB LED drivers that are PWM-driven with programmable color, intensity and blinking patterns. They additionally
feature a FLASH function to support picture taking with camera-enabled cellular phones.
An efficient magnetic boost DC/DC converter provides the required bias, operating from a single Li-Ion battery. The DC/DC
converter output voltage is user programmable for adapting to different LED types and for efficiency optimization.
All functions are software controllable through the SPI interface and internal registers.
Applications
GSM Cellular Phones
WCDMA, CDMA and CDMA2000 Phones
PHS and PDC Cellular Phone
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