Description
The FAN7311B provides all the control functions for a series parallel resonant converter as well as a pulse width modulation (PWM) controller to develop a supply voltage. Typical operating frequency range is between 30kHz and 250kHz, depending on the cold cathode fluorescent lamp (CCFL) and the transformer's characteristics. The FAN7311B uses a new patent-pending phase shift control.

FEATUREs
„High-Efficiency Single-Stage Power Conversion
„Wide Input Voltage Range: 5V to 25.5V
„Backlight Lamp Ballast and Soft Dimming
„Reduced Number of Required External Components
„Precision Voltage Reference Trimmed to 2%
„ZVS Full-Bridge Topology
„Soft-Start Capability
„PWM Control at Fixed Frequency
„Analog and Burst Dimming Function
„Programmable Striking Frequency
„Open-Lamp Protection
„Open-Lamp Regulation
„20-Pin SOIC

Applications
„LCD TV
„LCD Monitor