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:
Oct. 27, 2009
Filed:
Aug. 03, 2007
Chao-hsuan Chuang, Jhubei, TW;
Cheng-hsuan Fan, Hsinchu, TW;
Hung-che Chou, Jiadung Township, Pingtung County, TW;
Chao-Hsuan Chuang, Jhubei, TW;
Cheng-Hsuan Fan, Hsinchu, TW;
Hung-Che Chou, Jiadung Township, Pingtung County, TW;
Richtek Technology Corp., Hsinchu, TW;
Abstract
A flyback converter has a controller to switch a power switch so as to convert an input voltage to an output voltage for a load by monitoring an output voltage dependent signal and a current sensing signal derived from a current flowing through the power switch, a light-load efficiency improving apparatus monitors the load and a supply voltage provided for the controller to selectively clamp the output voltage dependent signal when the load is lower than a first threshold value and the supply voltage is lower than a second threshold value, so as to increase the supply voltage.