BRIDGELESS PFC CONVERTER WITH AVERAGE CURRENT MODE CONTROL

摘要

PROBLEM TO BE SOLVED: To provide a bridgeless PFC converter with an average current mode control, capable of detecting input current without increasing production cost.SOLUTION: During inrush current is limited in a bridgeless PFC converter, a phase information of AC power to be input is detected based on input voltage, and during a limitation of the inrush current is canceled and PFC boost control is implemented, current flowing from an output edge of a ground side to a ground side of upper and lower arms, is detected, the input current is calculated based on the current to obtain the input current that is a parameter required for the PFC boost control with the average current mode without using an expensive hall current sensor and high breakdown voltage differential amplifier.