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:
May. 22, 2007
Filed:
May. 28, 2003
Hiroshi Usui, Niiza, JP;
Yukinari Fukumoto, Niiza, JP;
Yasuhiro Rikiishi, Niiza, JP;
Syouhei Osaka, Niiza, JP;
Hiroshi Usui, Niiza, JP;
Yukinari Fukumoto, Niiza, JP;
Yasuhiro Rikiishi, Niiza, JP;
Syouhei Osaka, Niiza, JP;
Sanken Electric Co., Ltd., , JP;
Abstract
A converter is provided in which the cost and size of which are reduced by a decrease in current consumption with no need of large elements or radiation fins. The converter has a switching element (Q) being connected to a DC power source through a primary winding (P) of a transformer (T), a control circuit () for turning on/off the switching element (Q), a diode (D) and a capacitor (C) for rectifying/smoothing the voltage induced in the secondary winding (S) of the transformer (T) to extract DC output, and a starting circuit () for starting the control circuit (). The starting circuit () operates as a constant current circuit (Q, R, R, ZD, D) while starting the control circuit (), and as a constant voltage circuit (Q, R, R, ZD, D) after starting the control circuits ().