General Description

The AP3009 is an inductor-based DC/DC converter designed to drive up to six white LEDs in series for backlight. Only one feedback resistor is needed to control the LED current and obtain satisfied brightness.

Features

• Inherently Uniform LED Current

• High Efficiency: 83 Typical

• No Need for Extra Schottky Diode

• Over Output Voltage Protection

• Drives 2 to 6 LEDs

• Fast 1.2MHz Switching Frequency

• Uses Tiny 1mm Tall Inductor

• Requires Only 0.22µF Output Capacitor

Applications

• Cellular Phones

• Digital Cameras

• LCD modules

• GPS Receivers

• PDAs, Handheld Computers