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:
Mar. 03, 2009
Filed:
Mar. 07, 2006
Shigeru Hirata, Kyoto, JP;
Masanori Tsuchihashi, Kyoto, JP;
Kazuhiro Murakami, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A temperature protective circuit of the semiconductor integrated circuit unit of the present invention is configured such that the circuit includes a heat generation detecting section for detecting a monitored temperature and a limiting signal producing section for limiting continuously or stepwise the drive of a load (for example, the upper limit of drive current) according to the above-mentioned monitored temperature, after the above-mentioned monitored temperature exceeds a first threshold temperature, based on the detection results of the above-mentioned heat generation detecting section. With such a configuration, an abnormal heat generation of a subject of overheat monitoring can be previously limited to perform a more safely temperature protective operation.