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. 16, 2026
Filed:
Aug. 31, 2021
Mitsubishi Electric Corporation, Tokyo, JP;
Kohei Onda, Tokyo, JP;
Naohiko Mitomi, Tokyo, JP;
Kazuhiro Otsu, Tokyo, JP;
Junichiro Ishikawa, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
A semiconductor drive device includes a gate drive unit which drives a semiconductor switching element, and an overcurrent protection unit. The overcurrent protection unit includes an overcurrent determination unit which receives a detection signal and determines whether there is overcurrent, and a gate voltage reducing unit which reduces gate-applied voltage when it is determined that there is the overcurrent. The overcurrent determination unit includes a clamp diode for clamping a potential of an input part for the detection signal at a gate potential, a first transistor to which the input part is connected, and a low-pass filter. When the potential of the input part has reached a set value, the first transistor is turned on so that it is determined that there is the overcurrent in the semiconductor switching element.