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. 29, 2009
Filed:
Jun. 07, 2006
Yukihiro Nishikawa, Hino, JP;
Yukihiro Nishikawa, Hino, JP;
Fuji Device Technology Co., Ltd., Tokyo, JP;
Abstract
A control circuit for controlling a subsidiary (high-side) switching device in an insulating electric power converter having a half-bridge structure includes a first series circuit of a resistor and a diode, a second series circuit of a resistor and a diode, and a transistor. The control circuit turns the subsidiary switching device ON and OFF using the voltage generated in a transformer winding for a signal voltage. The control circuit also turns the transistor ON and OFF with the voltages generated in the first and second series circuits so as not to make the gate voltage of subsidiary switching device exceed the gate breakdown voltage thereof in all the operation modes.