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:
Nov. 11, 2025
Filed:
Jul. 12, 2023
Chengdu Monolithic Power Systems Co., Ltd., Chengdu, CN;
Xuefeng Chen, Hangzhou, CN;
Chengdu Monolithic Power Systems Co., Ltd., Sichuan, CN;
Abstract
A controller used in an isolated switching converter with a transformer, a primary switch and a secondary switch, the controller has a maximum sense circuit for providing a first voltage signal representative of a maximum value of a first voltage across the secondary switch, and a timer for starting timing when the first voltage increases to a second voltage signal less than the first voltage signal and stop timing when the first voltage increases to the first voltage signal, and the timing duration of the timer is a first time interval. The secondary switch is turned on for a second ON-time after a current flowing through the secondary switch decreases to zero. The second ON-time of the secondary switch is adjusted so that the first time interval of the next switching cycle is close to a first time threshold.