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:
Dec. 02, 2025
Filed:
Jul. 12, 2023
Applicant:
Chengdu Monolithic Power Systems Co., Ltd., Chengdu, CN;
Inventor:
Xuefeng Chen, Hangzhou, CN;
Assignee:
Chengdu Monolithic Power Systems Co., Ltd., Sichuan, CN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M 1/00 (2007.01); H02M 1/08 (2006.01); H02M 3/335 (2006.01);
U.S. Cl.
CPC ...
H02M 1/0058 (2021.05); H02M 1/0009 (2021.05); H02M 1/083 (2013.01); H02M 3/33523 (2013.01); H02M 3/33592 (2013.01); H02M 1/0003 (2021.05);
Abstract
A controller used in an isolated switching converter having a transformer, a primary switch and a secondary switch. The controller has an ON-time control circuit. The secondary switch is turned on for a second ON-time after a current flowing through the secondary switch decreases to zero. The ON-time control circuit provides an ON-time control signal to control the second ON-time of the secondary switch based on a drain terminal voltage of the secondary switch, the output voltage of the isolated switching converter and a resistance of an external resistor outside of the controller.