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:
Mar. 30, 2021
Filed:
Mar. 12, 2018
Applicant:
Rohm Co., Ltd., Kyoto, JP;
Inventor:
Shun Fukushima, Kyoto, JP;
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M 3/158 (2006.01); H02M 1/08 (2006.01); H02M 3/155 (2006.01); H02M 1/00 (2006.01);
U.S. Cl.
CPC ...
H02M 1/083 (2013.01); H02M 3/155 (2013.01); H02M 3/1582 (2013.01); H02M 2001/0032 (2013.01); H02M 2001/0058 (2013.01); Y02B 70/10 (2013.01);
Abstract
A switch controller performs first sleep operation, to which a transition from normal operation is made when a light load is detected, and second sleep operation, to which a transition is made after the first sleep operation. In the first sleep operation, a coil current is passed via a body diode of any of a plurality of transistors that is off to an input voltage side or to an output voltage side. In the second sleep operation, a current path from at least one of first and second connection nodes to ground is formed.