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:
Sep. 25, 2018
Filed:
Jan. 07, 2015
Fuji Electric Co., Ltd., Kawasaki-shi, JP;
Masaru Saito, Matsumoto, JP;
FUJI ELECTRIC CO., LTD., Kawasaki-Shi, JP;
Abstract
Aspects of the invention can include a semiconductor device, control IC for switching power supply and switching power supply unit, which allow input voltage detecting function to be realized without resistor-voltage dividing circuit. An npn-type element consisting of p-type region, collector region and emitter region is included inside of drain region of starting element. On a first interlayer insulating film, aspects of the invention can provide collector electrode wiring of npn-type element, emitter-drain electrode wiring serving as both emitter electrode wiring of npn-type electrode and drain electrode wiring of starting element, source electrode wiring of starting element, and gate electrode wiring of starting element. A first metal wiring can serve both as input terminal of starting element and input terminal of npn-type element is connected to collector electrode wiring. The npn-type element can function as input voltage detecting means for detecting input voltage drop applied to the first wiring.