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:
Apr. 24, 2018
Filed:
Aug. 22, 2017
Applicant:
Asian Power Devices Inc., Taoyuan, TW;
Inventor:
Chih-Yuan Hsu, Taoyuan, TW;
Assignee:
Asian Power Devices Inc., Taoyuan, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 1/32 (2007.01); H02M 3/338 (2006.01); H02M 3/158 (2006.01); H02M 3/156 (2006.01); H02M 7/217 (2006.01);
U.S. Cl.
CPC ...
H02M 3/3385 (2013.01); H02M 1/32 (2013.01); H02M 3/156 (2013.01); H02M 3/1588 (2013.01); H02M 7/217 (2013.01);
Abstract
An overvoltage protection circuit adapted for a switching power supply is provided. The overvoltage protection circuit can use the time difference of the start of the overvoltage protection to distinguish that the overvoltage of the output voltage of the switching power supply is caused by the failure of the internal feedback or by the internal power supply, thereby avoiding a short and harmless external power supply to affect the normal operation of the switching power supply but can immediately stop the switching power supply to achieve protection when the switching power supply has an internal feedback failure.