Negative charge pump offers 12% efficiency gain

Negative charge pump offers 12% efficiency gain

Suitable for driving up to six white or RGB LEDs for display backlights and general light management, the MAX8647 negative charge pump achieves 12% efficiency gain, even with a large LED forward-voltage mismatch. Features include a quiescent current of 70 µA, a dimming current of 100 µA, a current accuracy of ±1%, temperature derating, and overvoltage protection.

A sister product to the MAX8647, the MAX8648 negative charge pump also has adaptive-mode switching to each LED and groups the control of the LEDs into three zones with serial-pulse dimming. (Ea/2,500: MAX8647, from $1.95; MAX8648, $1.70—available now.)

Maxim Integrated Products , Sunnyvale , CA
Customer Service 800-998-8800

http://www.maxim-ic.com