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:
Feb. 10, 2004
Filed:
Jul. 19, 2002
Pao-Chuan Lin, Jubei, TW;
Chun-Hsien Lee, Changhua, TW;
Chih-Hsin Chen, Hsinchu, TW;
Chung-Shing Tzou, Hsinchu, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A power factor correction (PFC) circuit with a resonant snubber. The power factor correction (PFC) circuit has an input part ( ) for receiving an AC voltage and outputting a first DC voltage; a main part ( ) for converting the first DC voltage to a second DC voltage; and a snubber ( ) for ensuring the main part operates in soft turn-on and soft turn-off. The main part ( ) has a primary inductor and a primary diode connected in series, and a switch ( ) connected to the connection node of the primary inductor and the primary diode. The snubber ( ) has a cascaded device (a first diode and a resonant inductor connected in series) and a second diode connected in series, and a resonant capacitor connected between the connection node of the cascaded device and second diode, and the switch ( ).