LP3931

OBSOLETE LP3931 www.ti.com SNVS303A – AUGUST 2004 – REVISED OCTOBER 2011 LP3931 Dual RGB LED Driver with High Current Boost DC-DC Converter Check for Samples: LP3931 FEATURES 1 2 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 APPLICATIONS GSM Cellular Phones WCDMA, CDMA and CDMA2000 Phones PHS and PDC Cellular Phone 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. 1 Please be aware that an important notice concerning availa...