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:
Sep. 17, 2024
Filed:
Aug. 30, 2022
Bcd Shanghai Micro-electronics Company Limited, Shanghai, CN;
Andong Zhao, Shanghai, CN;
Bo Chen, Shanghai, CN;
Guanghui He, Shanghai, CN;
Cong Zou, Shanghai, CN;
Sen Dou, Shanghai, CN;
Zheng Ying, Shanghai, CN;
Yizhong Xie, Shanghai, CN;
BCD SHANGHAI MICRO-ELECTRONICS COMPANY LIMITED, Shanghai, CN;
Abstract
A system for controlling a skip mode of a switching power supply and a PWM controller are provided. The system includes a feedback signal detection circuit configured to detect an output voltage of the switching power supply and generate a feedback signal related to the output voltage; a primary winding sampling circuit coupled with a primary winding of the switching power supply and configured to sample a sampling voltage of the primary winding; a skip mode soft control circuit configured to receive the feedback signal and output an electrical signal; and a comparison circuit configured to determine a threshold for the sampling voltage, where the skip mode is activated when the feedback signal is greater than a soft activation voltage threshold, and the skip mode is pre-exited when the feedback signal is less than a predetermined voltage threshold and greater than a soft exit voltage threshold.