Controller for a power factor corrector and method of...

Details Controller for a power factor corrector and method of... Controller for a power factor corrector and method of...

2006-03-14

2006-03-14

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S222000, C323S285000, C323S299000, C363S045000

Reexamination Certificate

active

07012413

ABSTRACT:
A controller for use with a current-controlled frequency-modulated power factor corrector having a power switch therein, and a method of regulating the same. In one embodiment, the controller includes a sensing circuit configured to detect a sense current that is representative of an input current to the power factor corrector. The controller also includes a frequency modulation circuit, coupled to the sensing circuit, configured to provide a signal that causes at least one of: (a) an increase of a switching frequency of the power switch when the input current increases, and (b) a decrease of the switching frequency of the power switch when the input current decreases.

REFERENCES:
patent: 5001620 (1991-03-01), Smith
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patent: 5793623 (1998-08-01), Kawashima et al.
patent: 6034513 (2000-03-01), Farrington et al.
patent: 6091233 (2000-07-01), Hwang et al.
patent: 6344986 (2002-02-01), Jain et al.
UCC2817, UCC2818, UCC3817, UC3838 BiCMOS Power Factor Preregulator; Unitrode Products from Texas Instruments; 2001; 18 pg, (no month).
L4981A, L4981B Power Factor Corrector; ST Microelectronics; Nov. 2001; 16 pg.

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