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:
Apr. 10, 2012
Filed:
Jul. 10, 2009
Applicant:
Tsung-hsiu Wu, Hsinchu, TW;
Inventor:
Tsung-Hsiu Wu, Hsinchu, TW;
Assignee:
Leadtrend Technology Corporation, Hsinchu, TW;
Primary Examiner:
Int. Cl.
CPC ...
G05F 5/00 (2006.01); G05F 1/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A control apparatus and a control method for a power factor correction power converter are provided. The control apparatus is configured to reduce the variation rate of a reference signal with a rising portion and a falling portion. When the primary winding almost completely releases the stored energy, and the falling portion of the reference signal reaches a determined condition, the control apparatus turns on a switch for increasing the stored energy of the primary winding.