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:
Sep. 21, 2010
Filed:
May. 21, 2007
Applicants:
Kazuhiro Komatsu, Kobe, JP;
Yuichiro Shimizu, Kobe, JP;
Daisuke Enomoto, Kobe, JP;
Inventors:
Assignee:
Fujitsu Ten Limited, Kobe, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H 3/08 (2006.01); H02H 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A power supply control circuit is configured including a MOS-FETconnected between a DC power supplyand a load circuitso that a body diode Dformed between the drain and the source is in a forward direction; and a holding circuitfor maintaining the ON state of the MOS-FETfor a predetermined time when the power supply from the DC power supplyis stopped; where heat generation of the switching element by the surge voltage is suppressed when the surge voltage is generated to prevent breakdown of the switching element while preventing breakdown of internal circuits with respect to reverse connection of the power supply.