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. 08, 2026
Filed:
Nov. 30, 2023
Shanghai Bright Power Semiconductor Co., Ltd., Shanghai, CN;
SHANGHAI BRIGHT POWER SEMICONDUCTOR CO., LTD., Shanghai, CN;
Abstract
A control circuit for an isolated power supply and an isolated power supply are disclosed. The control circuit includes a secondary-side and a primary-side control signal generation circuits. In a present switching period, the secondary-side control signal generation circuit provides an indication for turning on asynchronous rectification transistor when detecting that a voltage across a secondary-side winding reaches a first predetermined voltage and provides an indication for turning off the synchronous rectification transistor when a period of time over which the synchronous rectification transistor is conducted reaches a first conduction time. The first conduction time is adjustable based on a first instant at which an indication for turning off the synchronous rectification transistor was provided in a previous switching period, a second instant at which an indication for turning on a primary-side switching transistor was provided in the previous switching period and a predetermined reference period.