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.

Date of Patent:
Sep. 18, 2018

Filed:

Jun. 06, 2017
Applicant:

Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;

Inventors:

Shogo Hiyama, Shinagawa, JP;

Kentarou Yuasa, Chofu, JP;

Assignee:

FUJITSU LIMITED, Kawasaki, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M 1/08 (2006.01); H02M 3/337 (2006.01); H02M 3/158 (2006.01); H02M 1/00 (2006.01);
U.S. Cl.
CPC ...
H02M 1/08 (2013.01); H02M 3/3378 (2013.01); H02M 3/1584 (2013.01); H02M 2001/007 (2013.01); H02M 2001/0067 (2013.01); H02M 2003/1586 (2013.01);
Abstract

A voltage control apparatus includes a boost converter configured to convert an input voltage to a voltage equal to or higher than a first voltage in an operative state and directly output the input voltage in an inoperative state, a buck-boost converter coupled with the boost converter in parallel and configured to convert the input voltage to a second voltage lower than the first voltage, a memory, and a processor coupled to the memory and configured to keep the buck-boost converter in the operative state, set the boost converter to the inoperative state when the input voltage is equal to or higher than the first voltage, and change the boost converter to the operative state when the input voltage is lower than the first voltage.


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