The highly integrated FAN4800AS/CS/01S/02S parts are specially designed for power supplies that consist of boost PFC and PWM. They require very few external components to achieve versatile protections / compensation. They are available in 16-pin DIP and SOP packages.
The PWM can be used in either current or voltage mode. In voltage mode, feed-forward from the PFC output bus can reduce the secondary output ripple.
Features
■ Pin-to-Pin Compatible with ML4800 and FAN4800 and CM6800 and CM6800A
■ PWM Configurable for Current Mode or Feedforward Voltage-Mode Operation
■ Internally Synchronized Leading-Edge PFC and Trailing-Edge PWM in One IC