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:
Nov. 28, 2017
Filed:
May. 27, 2016
Applicant:
Renesas Electronics Corporation, Tokyo, JP;
Inventor:
Yutaka Hayashi, Kodaira, JP;
Assignee:
RENESAS ELECTRONICS CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60R 21/017 (2006.01); H02M 3/07 (2006.01); H02M 3/156 (2006.01); H02J 7/34 (2006.01);
U.S. Cl.
CPC ...
B60R 21/017 (2013.01); H02J 7/34 (2013.01); H02M 3/07 (2013.01); H02M 3/156 (2013.01);
Abstract
An ECU includes a boosting circuit that boosts an input power supply voltage, a backup capacitor that charges a backup power supply in accordance with a boosted voltage boosted by the boosting circuit, an airbag ignition circuit that drives an airbag with the backup power supply charged by the backup capacitor as a driving power supply, and a bidirectional current limiting unit that limits a charging current flowing from the boosting circuit to the backup capacitor and limits a backflow current flowing from the backup capacitor to the boosting circuit.