Digital controller based power factor correction circuit

Details Digital controller based power factor correction circuit Digital controller based power factor correction circuit

2006-05-05

2008-11-25

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S285000, C363S039000, C363S044000

Reexamination Certificate

active

07456621

ABSTRACT:
A power factor correction circuit utilizes a digital controller string comprised of an analog-to-digital converter, which is input to a digital compensator followed by a pulse width modulation circuit for generating a switching pulse. The loop current in a regulator circuit such as a boost regulator is sensed and input to one side of a differential analog-to-digital converter, the other side thereof providing a digital reference current. This digital reference current is derived from comparing the input AC voltage to the regulator with the DC output voltage and processing these two voltages with a PFC algorithm to provide this reference voltage.

REFERENCES:
patent: 6175272 (2001-01-01), Takita
patent: 6448745 (2002-09-01), Killat
patent: 6791305 (2004-09-01), Imai et al.
patent: 6917185 (2005-07-01), Okamoto

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