GENERAL DESCRIPTION

The ML4877 is an ideal solution for driving multiple cold cathode fluorescent tubes (CCFL) used in liquid crystal display (LCD) backlight applications. It provides dimming ballast control for the LCD display.

FEATURES

■ Ideal for 30W inverter designs, 1 to 8 lamp design

■ PWM dimming capability

■ Backlight lamp driver with differential drive

■ Up to 30 lower power for same light output

■ Low standby current (<10µA)

■ Improved efficiency (»95)

■ Allows all N-channel MOSFET drive

■ Adjustable lamp out detect with latch

■ Resonant threshold detection and synchronous rectification

■ Positive input for dimming control