Description

The FAN7547A provides all control functions for a current-fed, push-pull, self-oscillation type converter and also contains a pulse-width-modulated (PWM) controller to develop a supply voltage. Typical operating frequency range is from 30kHz to 100kHz, depending on the cold cathode fluorescent lamp (CCFL) and the transformers characteristics.

Features

■ Backlight Lamp Ballast and Soft Dimming

■ Reduced Number of Components

■ Wide Range of Operating Voltage (6 to 30V)

■ Precision Voltage Reference Reduced to 3.4

■ Low Standby Current (Typically 50µA)

■ Soft-Start Function

■ PWM Control

■ Analog, Mixed, and PWM Dimming Function

■ P-Channel MOSFET Drive

■ Open-Lamp Protections (OLP)

■ Shutdown Protections (SDP)

■ 14-Pin SOP