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:
Mar. 29, 2016
Filed:
Sep. 23, 2013
Hajime Kosugi, Okazaki, JP;
Hajime Kosugi, Okazaki, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
A switching control circuit includes voltage application means that applies a first voltage to a gate of a power device in a first period and applies a second voltage to the gate of the power device in a second period, wherein the first period starts when the power device is turned on; current detection means that detects whether a current flowing through the power device exceeds a threshold; and voltage decrease means that decreases the voltage with a first speed if the current detection means detects that the current exceeds the threshold in a second detection period, decreases the gate voltage with a second speed, lower than the first speed, if the current detection means detects that the current exceeds the threshold in a third detection period, and does not decrease the gate voltage if the current detection means detects that the current exceeds the threshold in the first period.