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:
Jul. 04, 2017
Filed:
Jan. 21, 2013
Applicant:
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Inventors:
Assignee:
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60L 11/18 (2006.01); H02M 3/158 (2006.01); H02M 1/44 (2007.01); H02M 3/156 (2006.01); H02M 1/08 (2006.01); H02M 1/14 (2006.01); H02M 1/00 (2006.01);
U.S. Cl.
CPC ...
B60L 11/18 (2013.01); H02M 1/08 (2013.01); H02M 1/14 (2013.01); H02M 1/44 (2013.01); H02M 3/156 (2013.01); H02M 3/158 (2013.01); H02M 2001/0006 (2013.01);
Abstract
Provided is an in-vehicle step-down switching power supply capable of obtaining a stable output while suppressing nose in a harmful frequency band even when an input voltage decreases. The in-vehicle step-down switching power supply includes a switching frequency control unit and the switching frequency control unit includes a switching frequency range setting unit that changes a switching frequency between fa and fb and a switching frequency path setting unit that skips a frequency band from fd to fe between fa and fb, via an intermediate frequency fc between fa and fb.