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. 31, 2011
Filed:
May. 13, 2008
Hiroshi Usui, Niiza, JP;
Hiroshi Usui, Niiza, JP;
Sanken Electric Co., Ltd., Niiza-shi, JP;
Abstract
A DC-DC converter includes a series circuit of a switch element Qand a switch element Qconnected to a DC power source, a series circuit of a primary winding Pof a transformer and a capacitor connected in parallel with one of the switch elements, a rectifying-smoothing circuit of a voltage generated by a secondary winding (S, S) of the transformer, a controller to alternately turn on/off the switch elements according to an output of the rectifying-smoothing circuit, first and second timing detectors to detect ON/OFF states of the switch elements, and an ON time storing part to operate in response to a detection signal from the second timing detector and store an ON time of the switch element Qbased on an OFF time of the switch element Q. The controller turns on the switch element Qonly during the stored ON time.