Apparatus and method for a power converter with feed-forward...

Details Apparatus and method for a power converter with feed-forward... Apparatus and method for a power converter with feed-forward...

2006-04-10

2009-02-10

Ullah, Akm E (Department: 2838)

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

C323S207000, C323S222000, C323S284000, C323S285000, C323S288000, C363S081000, C363S021010, C363S037000, C363S080000

Reexamination Certificate

active

07489532

ABSTRACT:
Apparatus and method for a power converter with feed-forward voltage compensation to enable a PFC circuit are proposed. A voltage divider and a feedback unit output a compensation voltage and a feedback voltage in response to an input voltage and an output voltage, respectively. The feedback voltage is compensated by the compensation voltage through an operation unit. A comparator activates the PFC circuit within a predetermined input power range based on the already compensated feedback voltage. The proposed power converter can always activate the PFC circuit before the input power reaches 75 W regardless of any variation of the input voltage.

REFERENCES:
patent: 5619405 (1997-04-01), Kammiller et al.
Lai et al., Time Quantity One-Cycle Control for Power-Factor Correctors, Mar. 1997, IEEE, Trans. on Power Electronics vol. 12 No. 2, p. 369-375.

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