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:
Jul. 06, 2021
Filed:
Feb. 21, 2020
Fuji Electric Co., Ltd., Kanagawa, JP;
Kunio Matsubara, Tokyo, JP;
Tsuyoshi Nagano, Tokyo, JP;
FUJI ELECTRIC CO., LTD., Kawasaki, JP;
Abstract
A gate driver for driving a gate of a switching element in accordance with an input signal is provided. The gate driver is configured to change a gate driving condition in accordance with a detected value of power supply voltage. Each time when the switching element is turned off, the gate driver stores a time width from a time when the input signal is switched to an off command to a time when switch-off surge occurs in the switching device. If it is determined that the gate driving condition should be changed during turn-off operation of the switching element, the gate driver switches the gate driving condition when a time corresponding to the time width stored at a previous turn-off is elapsed after a current turn-off of the switching element is started.