LP5521TMEV

LP5521 评估套件

LP5521TMEV

概述

The LP5521 is a three channel LED driver designed to produce a variety of lighting effects for mobile devices. A high efficiency charge pump enables LED driving over full Li-Ion battery voltage range. The device has a program memory for creating variety of lighting sequences. When program memory has been loaded, the LP5521 can operate independently without processor control

The LP5521 Evaluation Kit is based on a computer controlled system, where the actual LP5521 devices are controlled and powered through the USB interface. Also, external power can be used if wanted. Two different sets of LEDs can be selected, either white LEDs or RGB LEDs. Four LP5521 Devices are assembled on one board to be able to evaluate the triggering/sequencing of multiple devices in one application.

特性

Adaptive charge pump with 1x and 1.5x gain provides up to 95% LED drive efficiency
Charge pump with soft start and overcurrent/short circuit protection
Low input ripple and EMI
Very small solution size, no inductor or resistors required
200 nA typical shutdown current
Automatic power save mode
I²C compatible interface
Independently programmable constant current outputs with 8-bit current setting and 8-bit PWM control
Typical LED output saturation voltage 50 mV and current matching 1%
Three program execution engines with flexible instruction set
Autonomous operation without external control
Large SRAM program memory
Two general purpose digital outputs
microSMD-20 package, 0.4 mm pitch
Bumped LLP-24 package, 0.5 mm pitch

Applications:

Fun / indicator lights
LCD sub-display backlighting
Keypad RGB backlighting and phone cosmetics
Vibra, speakers, waveform generator
Input to the LI-LO configuration, can be post regulated when supply is regulated by Buck2
Up to 1000 mA output current by selection of external FET