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:
May. 05, 2020
Filed:
Jul. 31, 2017
Applicant:
Denso Corporation, Kariya, Aichi-pref., JP;
Inventors:
Kohei Shinomiya, Kariya, JP;
Takahiro Iwamura, Kariya, JP;
Akimasa Niwa, Kariya, JP;
Masahiro Yamamoto, Kariya, JP;
Seiji Nishimoto, Kariya, JP;
Assignee:
DENSO CORPORATION, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 27/08 (2006.01); H02P 29/60 (2016.01); H03K 17/0812 (2006.01); H03K 17/16 (2006.01); H03K 17/08 (2006.01);
U.S. Cl.
CPC ...
H03K 17/08122 (2013.01); H02P 27/08 (2013.01); H03K 17/08128 (2013.01); H03K 17/162 (2013.01); H03K 17/168 (2013.01); H03K 2017/0806 (2013.01);
Abstract
A transistor drive circuit drives a bipolar-type transistor and a MOSFET that are connected in parallel to each other. A temperature detection element that detects a temperature of a the bipolar-type transistor or the MOSFET. When the temperature is equal to or less than a threshold, the transistor drive circuit turns on both of the MOSFET and the bipolar-type transistor. When the temperature exceeds the threshold, the transistor drive circuit turns on only the bipolar-type transistor.