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:
Jun. 26, 2018
Filed:
May. 04, 2015
Hkr Seuffer Automotive Gmbh & Co. KG, Kupferzell, DE;
Jochen Fuchs, Waldenburg, DE;
HKR SEUFFER AUTOMOTIVE GMBH & CO. KG, Kupferzell, DE;
Abstract
The present invention concerns a circuit arrangement for thermal protection of a power semiconductor, wherein there is provided a two-stage thermal protection in the control circuit and in the load circuit of the power semiconductor. A first stage () with temperature-dependent resistance device serves for reducing or switching off the control voltage of the power semiconductor () when a first threshold temperature is reached at the temperature-dependent resistance device. In addition, provided in the load circuit of the power semiconductor () is a second stage () with a cutout element thermally coupled to the power semiconductor () for interrupting a load current of the power semiconductor when a second threshold temperature is reached at the cutout element. In that case the first stage forms an active temperature protection for the power semiconductor () to avoid damage and the second stage forms a temperature protection in the case of a malfunction of the power semiconductor ().