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:
Jul. 14, 2015
Filed:
Aug. 15, 2012
Qiming Zhao, Shanghai, CN;
Fei Xiong, Shanghai, CN;
Jianyu Xie, Shanghai, CN;
Xue Jiang, Shanghai, CN;
Yimin Liang, Shanghai, CN;
Qiming Zhao, Shanghai, CN;
Fei Xiong, Shanghai, CN;
Jianyu Xie, Shanghai, CN;
Xue Jiang, Shanghai, CN;
Yimin Liang, Shanghai, CN;
Chengdu Monolithic Power Systems Co., Ltd., Chengdu, CN;
Abstract
A switching power supply comprising a switching circuit and a controller. The controller comprises a preprocessing circuit, a first multiplier, a first comparing circuit and a logic circuit. The controller comprises a preprocessing circuit, a first multiplier, a first comparing circuit and a logic circuit. The preprocessing circuit generates a first multiplication input signal based on the input voltage and output voltage of the switching circuit. The first multiplier multiplies the first multiplication input signal by a second multiplication input signal and generates a first product signal. The first comparing circuit compares a current sensing signal representative of the input current with the first product signal and generates a first comparison signal. The logic circuit turns off a main switch in the switching circuit when the current sensing signal is larger than the first product signal.