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:
May. 29, 2018
Filed:
Jun. 23, 2017
Suzhou Poweron Ic Design Co., Ltd., Suzhou, Jiangsu, CN;
Yangbo Yi, Jiangsu, CN;
Haisong Li, Jiangsu, CN;
Changshen Zhao, Jiangsu, CN;
Wenliang Liu, Jiangsu, CN;
Ping Tao, Jiangsu, CN;
SUZHOU POWERON IC DESIGN CO., LTD., Suzhou, CN;
Abstract
A switching power supply is provided which includes: an output port; a transformer; a first voltage divider circuit, configured to divide a feedback voltage to obtain a first divided voltage; and a primary controller, configured to control a current of the primary winding of the transformer; where the primary controller includes: a first comparison module, configured to compare the first divided voltage with a first reference voltage to obtain a first comparison result; a second comparison module, configured to compare the power supply voltage with a second reference voltage to obtain a second comparison result; and an open circuit protection module, configured to generate an open circuit protection signal, where the primary controller is configured to stop control of the primary winding in response to the open circuit protection signal. The present disclosure can efficiently detect disconnection of the up-sampling resistor of the switching power supply and provide open-circuit protection.