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:
Oct. 23, 2018
Filed:
Jun. 01, 2016
Applicant:
Smk Corporation, Tokyo, JP;
Inventor:
Toshihiro Amei, Tokyo, JP;
Assignee:
SMK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 3/00 (2006.01); H02M 3/156 (2006.01); H02H 7/12 (2006.01); H02M 1/08 (2006.01); H02M 1/32 (2007.01);
U.S. Cl.
CPC ...
H02M 3/156 (2013.01); H02H 7/1213 (2013.01); H02M 1/08 (2013.01); H02M 1/32 (2013.01); H02M 2001/327 (2013.01);
Abstract
In a DC-DC converter, a voltage at a connecting point where a switching transistor is connected to an inductor is compared with a threshold voltage set within a variation range of the voltage at the connecting point during switching operation of the switching transistor. When a polarity in which the voltage at the connecting point and the threshold voltage are compared does not vary in a detection time longer than the predetermined period of a driving circuit, the switching transistor is determined to be operating in an active state with a risk of heat generation.