Simulation and implementation of Variable Duty Cycle Control to Achieve High Input Power Factor for DCM Boost PFC Converters

摘要

A discontinuous-conduction-mode (DCM) boost power factor correction (PFC) converter features zero-current turn-on for the switch, no reverse recovery in diode, and constant– frequency operation. But the input power factor (PF) is relatively low when the duty cycle is constant. This paper describes variable duty cycle control to achieve high input power factor for DCM boost power factor correction converters.