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:
Jun. 19, 2018
Filed:
Jul. 21, 2015
Applicant:
Rohm Co., Ltd., Kyoto, JP;
Inventor:
Kazuhiro Murakami, Kyoto, JP;
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/158 (2006.01); H02M 1/32 (2007.01); H02M 3/156 (2006.01); H02M 1/00 (2006.01);
U.S. Cl.
CPC ...
H02M 3/1588 (2013.01); H02M 1/32 (2013.01); H02M 3/156 (2013.01); H02M 3/158 (2013.01); H02M 2001/0032 (2013.01); H02M 2003/1566 (2013.01); Y02B 70/16 (2013.01);
Abstract
A power control IC has a switching control circuit of a fixed on-period type which generates an output voltage from an input voltage by driving a coil by turning on and off an output transistor according to a result of comparison between a feedback voltage and a reference voltage, and a quieting circuit which forcibly turns on the output transistor by ignoring the result of comparison when, after an on-timing of the output transistor, a predetermined threshold time elapses without the next on-timing coming.