公开(公告)号：US20200336070A1

公开(公告)日：2020-10-22

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

Abstract: A method for improving the conversion efficiency of a CCM mode of a flyback resonant switch power supply, comprising: presetting a threshold value Tset, calculating a time interval Ttap between adjacent zero points during a present conducting time, outputting a switch-off signal at zero points, and comparing the time interval Ttap with the preset threshold value Tset; when Ttap>Tset, he present switch-off time to be less than a switch-off time of a previous cycle, outputting a switch-on signal; when Ttap=0, controlling the present switch-off time to be greater than a switch-off time of the previous cycle, outputting a switch-on signal; and when 0