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. 25, 2016
Filed:
Nov. 27, 2013
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventors:
Masashi Okamatsu, Osaka, JP;
Hideki Tanaka, Shiga, JP;
Katsuya Hagiwara, Osaka, JP;
Masahiro Tochigi, Osaka, JP;
Takashi Ueda, Osaka, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M 3/158 (2006.01); H03K 17/687 (2006.01);
U.S. Cl.
CPC ...
H02M 3/158 (2013.01); H02M 3/1582 (2013.01); H03K 17/6871 (2013.01); H03K 2217/0045 (2013.01); H03K 2217/0081 (2013.01);
Abstract
A DC-DC converter includes a switching device, a drive circuit for turning on and off the switching device, a bootstrap capacitor electrically connected to the drive circuit, and a control circuit electrically connected to the drive circuit. The control circuit is operable to charge the bootstrap capacitor for a charging duration periodically at a charging period longer than an on-off period at which the switching device is turned on and off periodically. This DC-DC converter performs efficient boost and step-down operations.