LP3933 Overview
The LP3933 is a plete lighting management system designed for portable wireless applications. It contains a boost DC/DC converter, 4 white-LED drivers to drive the main LCD panel backlight, 2 white-LED drivers for the sub-LCD panel and two sets of RGB/FLASH LED drivers. Both backlight drivers have 8-bit constant current drivers that are separately adjustable and matched to 0.5% (typ.).
LP3933 Key Features
- 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 pattern
- FLASH function with up to 6 outputs, each up to 120 mA
- 4 constant current LED drivers with programmable 8-bit adjustment (0 … 25 mA/LED)
- 2 constant current LED drivers with programmable 8-bit adjustment (0 … 25 mA/LED)
- Functions software controlled through SPI
- Additional LED on/off and dimming hardware
- Programmable low current Standby mode
- Low voltage digital interface down to 1.8V
- Space efficient 32-pin thin CSP laminate
