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. 27, 2017
Filed:
Aug. 31, 2015
Fuji Electric Co., Ltd., Kawasaki-shi, JP;
Hidetomo Ohashi, Matsumoto, JP;
FUJI ELECTRIC CO., LTD., Kawasaki-Shi, JP;
Abstract
A power device drive circuit reduces the short-circuit resistance of a power device that switches an input voltage. The power device drive circuit includes an output amplifier that applies a control voltage to a control terminal of the power device so as to be turned on and off, and an internal power supply circuit that generates a drive voltage of the output amplifier in accordance with a change in the input voltage, thereby causing the control voltage to change. In particular, the internal power supply circuit reduces the drive voltage of the output amplifier when the input voltage rises, thereby reducing the short-circuit current of the power device.