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:
Oct. 29, 2019
Filed:
Feb. 18, 2019
Denso Corporation, Kariya, Aichi-pref., JP;
Yoshitaka Kato, Kariya, JP;
Kenji Komiya, Kariya, JP;
Yusuke Shindo, Kariya, JP;
Yoshinori Hayashi, Kariya, JP;
Kenichi Wakabayashi, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A semiconductor device turns on and off a power switching device having a gate terminal and output terminals between which an output current is produced by a gate voltage applied to the gate terminal. The semiconductor device includes: an output current detector detecting a current value correlated with the output current; a voltage detector detecting a voltage across the output terminals of the power switching device; a clamp circuit clamping the gate voltage at a predetermined value; and a controller controlling the clamp circuit to adjust the gate voltage based on the voltage detected by the voltage detector. The controller controls the clamp circuit to set the gate voltage to be at a minimum voltage according to the detected voltage to cause the output current to be larger than a threshold current required for detecting the short circuit in the power switching device.