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. 16, 2008
Filed:
Nov. 28, 2005
Ta-yung Yang, Milpitas, CA (US);
Rui-hong LU, Shueishang Township, Chiayi County, TW;
Chuh-ching LI, Jhongli, TW;
Feng-cheng Tsao, Linbian Township, Pingtung County, TW;
Pei-sheng Tsu, Shulin, TW;
Ta-Yung Yang, Milpitas, CA (US);
Rui-Hong Lu, Shueishang Township, Chiayi County, TW;
Chuh-Ching Li, Jhongli, TW;
Feng-Cheng Tsao, Linbian Township, Pingtung County, TW;
Pei-Sheng Tsu, Shulin, TW;
System General Corporation, Taipei Hsien, TW;
Abstract
The present invention provides a switching control circuit having a valley voltage detector to achieve the soft switching and improve the efficiency of a power converter. The switching control circuit includes a control circuit coupled to the feedback signal to generate a switching signal. Through an output circuit, the switching signal drives a switching device for switching a transformer and regulating the output of the power converter. The valley voltage detector is coupled to an auxiliary winding of the transformer for generating a control signal in response to the voltage of the transformer. The control signal is used for enabling the switching signal. The switching signal further turns on the switching device in response to a valley voltage across the switching device.