公开(公告)号：US10461628B1

公开(公告)日：2019-10-29

申请号：US16231929

申请日：2018-12-24

Applicant: DELTA ELECTRONICS, INC.

Inventor： Hongbao Wang ,  Yanling Zong ,  Liangliang Ren ,  Dezhi Jiao ,  Jinfa Zhang

IPC: H02M1/42 ,  H02M1/08 ,  H02M7/04 ,  H02M1/00

Abstract: The present disclosure provides a control circuit and a control method, where the control circuit includes: a signal detection unit, a ZCD signal acquisition unit, a signal selection unit, a frequency limiting unit, and a PWM control signal generation unit; where the signal detection unit, the ZCD signal acquisition unit, the signal selection unit, the frequency limiting unit, and the PWM control signal generation unit are connected in cascade. The control circuit and the control method provided in the present disclosure reduce processing delay of a ZCD signal and improve signal processing accuracy of a PFC system.