Auxiliary circuit for power factor corrector having...

Details Auxiliary circuit for power factor corrector having... Auxiliary circuit for power factor corrector having...

2005-01-25

2005-01-25

Laxton, Gary L. (Department: 2838)

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

C323S282000, C323S285000

Reexamination Certificate

active

06847195

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.

REFERENCES:
patent: 5359281 (1994-10-01), Barrow et al.
patent: 5818707 (1998-10-01), Seong et al.

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