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. 19, 2016
Filed:
Dec. 23, 2013
Applicant:
Panasonic Corporation, Osaka, JP;
Inventor:
Seiji Yamahira, Kyoto, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 7/217 (2006.01); H02M 5/293 (2006.01); H02M 1/34 (2007.01);
U.S. Cl.
CPC ...
H02M 7/217 (2013.01); H02M 5/293 (2013.01); H02M 1/34 (2013.01);
Abstract
A switching power supply apparatus which receives AC voltage and includes: a transformer including a primary winding and a secondary winding; a first bidirectional switch connected in series with the primary winding; and a Snubber circuit connected in parallel with the primary winding. The AC voltage is applied to a series circuit which includes the primary winding and the first bidirectional switch. The Snubber circuit includes a second bidirectional switch for controlling the first bidirectional switch.