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