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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.:

US 9401705 B1

PDFFull Text
Date of Patent:
Jul. 26, 2016

Filed:

Jul. 05, 2012

Gate driving device

Applicants:

Takanori Kohama, Matsumoto, JP;

Kazutaka Masuzaw, Ueda, JP;

Inventors:

Takanori Kohama, Matsumoto, JP;

Kazutaka Masuzaw, Ueda, JP;

Assignee:

FUJI ELECTRIC CO., LTD., Kawasaki-Shi, JP;

Attorney:

Rabin & Berdo, P.C.

Primary Examiner:

Diana J Cheng

Int. Cl.
CPC ...
H03B 1/00 (2006.01); H03K 3/00 (2006.01); H03K 17/0812 (2006.01); H03K 17/06 (2006.01); H03K 17/567 (2006.01); H02M 3/155 (2006.01);
U.S. Cl.
CPC ...
H03K 17/0812 (2013.01); H03K 17/06 (2013.01); H03K 17/567 (2013.01); H02M 3/155 (2013.01); H03K 2217/0081 (2013.01);
Abstract

The present invention copes with fluctuations in a power supply voltage when a capacitor for coping with fluctuations in the power supply voltage has been omitted and also cases in which the power supply voltage is constantly low, thereby ensuring driving of an active element. A gate driving device of an IGBT includes: a first switch portion which turns on the IGBT; a second switch portion which turns off the IGBT; a current control portion which controls the outflow of charge on the gate to a ground line such that current is constant; a first protection circuit which suppresses outflow of gate current to the power supply line; and a second protection circuit which detects a prescribed fluctuation in an internal power supply voltage Vdc, and interrupts the connection between the current control portion and the ground line.

Find Patent Forward Citations

Kohama, Takanori. (2016). Gate driving device (U.S. Patent No. 9401705). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9401705

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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