GENERAL DESCRIPTION

The ML4822 is a PFC controller designed specifically for high power applications. The controller contains all of the functions necessary to implement an average current boost PFC converter, along with a Zero Voltage Switch (ZVS) controller to reduce diode recovery and MOSFET turn-on losses.

FEATURES

■ Average current sensing, continuous boost, leading edge PFC for low total harmonic distortion and near unity power factor

■ Built-in ZVS switch control with fast response for high efficiency at high power levels

■ Average line voltage compensation with brownout control

■ Current fed gain modulator improves noise immunity and provides universal input operation

■ Overvoltage comparator eliminates output “runaway” due to load removal

■ UVLO, current limit, and soft-start

■ Precision 1 reference