RT8567 - Richtek

RT8567 6-CH 43V WLED Driver

The RT8567 is a high efficiency driver for white LEDs. It is designed for LCD panels that employ an array of LEDs as the lighting source. An integrated current mode boost controller drives six strings in parallel and supports up to 12 WLEDs per string. The internal current sinks support a maximum of ±2% current mismatching for excellent brightness uniformity.

Features

z Wide Input Voltage : 2.7V to 24V z High Output Voltage : Up to 43V z Channel Current Programmable : 5mA to 40mA z Channel Current Regulation with Accuracy ±3% and Matching ±2% z Dimming Controls : External PWM Input Up to 25kHz z Adjustable Switching Frequency : 500kHz to 2MHz z Built-In Soft-Start z Protections ` LED Strings Open Detection ` Current Limit Protection ` Programmable Over Voltage Protection ` Over Temperature Protection z 20-Lead WQFN Package z RoHS Compliant and Halogen Free Applications z UMPC and Notebook Computer Backlight z GPS, Portable DVD Backlight Pin Configurations (.