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:
Oct. 01, 2024
Filed:
Aug. 10, 2022
Lii Semiconductor Co., Ltd, Guangdong, CN;
Lii Semiconductor Co., LTD, Guangdong, CN;
Abstract
The present application relates to a synchronous rectification sampling control circuit, method and chip. The control circuit includes a withstand voltage switch tube Q2, a power supply switch tube Q3, a positive phase power supply driving module, a detection control module, and a negative phase power supply module. The withstand voltage switch tube Q2 includes a withstand voltage source, a withstand voltage grid and a withstand voltage drain, in which the withstand voltage drain is configured to connect a secondary winding power supply circuit in a synchronous rectification circuit of a transformer to obtain a supply voltage and output a positive or negative sampling voltage at the withstand voltage source.