公开(公告)号：US11323039B2

公开(公告)日：2022-05-03

申请号：US16959001

申请日：2018-12-29

Applicant: CSMC TECHNOLOGIES FAB2 CO., LTD. ,  SOUTHEAST UNIVERSITY

Inventor： Weifeng Sun ,  Rongrong Tao ,  Hao Wang ,  Jinyu Xiao ,  Wei Su ,  Shen Xu ,  Longxing Shi

IPC: H02M3/335 ,  H03K5/24 ,  H02M1/00

Abstract: A method for improving the conversion efficiency of a CCM mode of a flyback resonant switch power supply, comprising: presetting a critical value Tset, calculating a time interval Ttap between adjacent zero points in the current connection time, outputting a shutdown signal at the zero points, and comparing the time interval Ttap with the preset critical value Tset; when Ttap>Tset, controlling the current shutdown time to be less than the shutdown time of the preceding cycle and outputting a start signal; when Ttap=0, controlling the current shutdown time to be greater than the shutdown time of the preceding cycle and outputting a start signal; and when 0