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. 12, 2022
Filed:
Nov. 20, 2019
Applicant:
Ablic Inc., Chiba, JP;
Inventor:
Kaoru Sakaguchi, Chiba, JP;
Assignee:
ABLIC INC., Chiba, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 17/082 (2006.01); H03K 17/08 (2006.01); H02H 7/12 (2006.01); H01L 27/02 (2006.01); H02H 5/04 (2006.01); H03K 17/0812 (2006.01);
U.S. Cl.
CPC ...
H03K 17/0822 (2013.01); H01L 27/02 (2013.01); H02H 5/04 (2013.01); H02H 7/12 (2013.01); H03K 17/082 (2013.01); H03K 17/0812 (2013.01); H03K 2017/0806 (2013.01);
Abstract
An overheat protection circuit includes a first constant current source which supplies a first constant current to a temperature sensitive element, a first transistor provided between the temperature sensitive element and the first constant current source, an output current detection circuit which controls a gate voltage of the first transistor by a voltage based on a sense current corresponding to an output current of a semiconductor device, and an output circuit which supplies an overheat detection signal based on a result of comparison between a temperature sensitive current and the first constant current.