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. 06, 2017
Filed:
Sep. 25, 2015
Renesas Electronics Corporation, Tokyo, JP;
Akira Uemura, Tokyo, JP;
Akihiro Nakahara, Tokyo, JP;
Renesas Electronics Corporation, Tokyo, JP;
Abstract
A load driving deviceincludes a temperature detector TDthat sets a temperature difference detection signal dt_ot to active when a temperature difference Tdif between a temperature Ttr of an output transistor Tand an ambient temperature becomes more than a reference temperature difference Tdref, and sets an over temperature detection signal at_ot to active when the temperature Ttr of the output transistor Tbecomes higher than a reference temperature Tref, a current limiter ILthat limits a GS current of the output transistor Twhen any one of the detection signals becomes active, and the output transistor Tthat turns off regardless of an external input signal IN when any one of the detection signals becomes active. The temperature detector TDsets the temperature difference detection signal dt_ot to inactive when the temperature difference Tdif between the output transistor temperature Ttr and the ambient temperature becomes equal to or less than a reference temperature difference Tdref, and sets the over temperature detection signal at_ot to inactive when the output transistor temperature Ttr becomes equal to or lower than a reference temperature Tref