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:
Jan. 25, 2005
Filed:
Aug. 07, 2002
Ching-chuan Chen, Taipei, TW;
Ching-Chuan Chen, Taipei, TW;
Skynet Electronic Co., Ltd., Taipei, TW;
Abstract
The invention is to provide an auxiliary circuit for power factor corrector (PFC) having self-power supplying and zero current detection (ZCD) mechanisms, which comprises a filter capacitor electrically coupled to a secondary winding of an inductor of the auxiliary circuit installed in a power supply and two resistors respectively coupled the positive and negative terminals of the filter capacitor in series with a ZCD pin of a PFC. Such that the secondary winding can be shared by the ZCD and the power supply pins of the PFC to eliminate a necessity of providing an additional ZCD winding and reduce the complexity of circuitry, the manufacturing cost, and a size of power supply without sacrificing power.