The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 14, 2024
Filed:
May. 15, 2020
Southeast University, Jiangsu, CN;
Csmc Technologies Fab2 Co., Ltd., Wuxi, CN;
Shen Xu, Wuxi, CN;
Siyu Zhao, Wuxi, CN;
Congming Qi, Wuxi, CN;
Sen Zhang, Wuxi, CN;
Xiaoyu Shi, Wuxi, CN;
Weifeng Sun, Wuxi, CN;
Longxing Shi, Wuxi, CN;
SOUTHEAST UNIVERSITY, Jiangsu, CN;
CSMC TECHNOLOGIES FAB2 CO., LTD., Wuxi, CN;
Abstract
A synchronous rectification control system and method for a quasi-resonant flyback converter are provided. The control system includes a switching transistor voltage sampling circuit configured to sample an output terminal voltage of the switching transistor to obtain a sampled voltage of the switching transistor; a sampling calculation module configured to obtain a dead-time based on the sampled voltage of the switching transistor and a preset relationship, the preset relationship being a correspondence between the duration of the sampled voltage of the switching transistor being below a first preset value and the dead-time during an on-time of a switching cycle of the switching transistor, the dead-time being a time from when the switching transistor is turned off to when the synchronous rectification transistor is turned on; and a control module configured to receive the dead-time and control switching of the synchronous rectification transistor based on the dead-time.