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. 26, 2017
Filed:
Jul. 01, 2015
Chengdu Monolithic Power Systems Co., Ltd., Chengdu, CN;
Li Xu, Chengdu, CN;
Chengdu Monolithic Power Systems Co., Ltd., Chengdu, CN;
Abstract
A control circuit for switching converter has an ON signal generating circuit, a current sensing circuit, an OFF signal generating circuit, a logic circuit and an OFF threshold generating circuit. The ON signal generating circuit provides an ON signal based on a reference signal and a feedback signal. The current sensing circuit provides a current sensing signal based on a current flowing through a power switch of the converter. The OFF signal generating circuit provides an OFF signal based on an OFF threshold signal and the current sensing signal. The logic circuit provides a control signal based on the ON signal and the OFF signal. The OFF threshold generating circuit adjusts the OFF threshold signal based on the difference between a frequency of the switching signal and a preset frequency, so as to make the frequency of the switching signal substantially equal or larger than the preset frequency.