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. 14, 2025
Filed:
Sep. 16, 2020
Mitsubishi Electric Corporation, Tokyo, JP;
Narumi Matsushita, Tokyo, JP;
Shinji Sakai, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
Provided is a drive device capable of suppressing an overshoot of source potential of a switching element even when a resistance value of a shunt resistance for detecting current of the switching element is large. A drive device driving a lower side switching element of an inverter circuit includes a drive circuit generating a drive signal being input to a gate of the lower side switching element and an overcurrent detection circuit detecting overcurrent flowing in the lower side switching element. The overcurrent detection circuit detects overcurrent based on voltage occurring in a shunt resistance connected to a source of the lower side switching element. The drive circuit applies potential of a connection node of the source of the lower side switching element and the shunt resistance as reference potential, and generates a drive signal of the lower side switching element.