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:
May. 14, 2002
Filed:
Mar. 09, 2000
Applicant:
Inventor:
Hengchun Mao, Plano, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/10 ; H02M 3/24 ;
U.S. Cl.
CPC ...
G05F 1/10 ; H02M 3/24 ;
Abstract
A controller for a power factor corrector (PFC), having a controllable switch and operable in a discontinuous conduction mode (DCM), and a method of controlling the controllable switch. In one embodiment, the controller includes: (1) a drive circuit adapted to drive the controllable switch and (2) a current mode control circuit adapted to sense a current of the PFC and develop a current control signal based thereon. The drive circuit reduces a duty cycle of the controllable switch based on the current control signal to reduce input current distortion in the PFC.