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:
Mar. 10, 2026
Filed:
Dec. 19, 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 control signal generation circuit, which, when detecting a voltage of a secondary winding reaches a first preset voltage value after a primary switching transistor is turned off, provides an instruction to turn on a synchronous rectification transistor. Following elapse of a predetermined period of time after the synchronous rectification transistor is turned on, the secondary control signal generation circuit detects a voltage/current of the synchronous rectification transistor, obtains a first electrical signal and derives a second electrical signal from the first electrical signal. When further detecting that the voltage/current of the synchronous rectification transistor reaches the value of the second electrical signal, the secondary control signal generation circuit provides an instruction to turn off the synchronous rectification transistor.