Power factor correction (PFC) circuit that eliminates an inrush current limit circuit
AssigneeInternational Business Machines Corporation
InventorsRandhir S. Malik, William Hemena
Life of this patent
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Abstract
Aspects for a power converter with power factor correction (PFC) circuit are described. The aspects include a buck/boost circuit for achieving a DC voltage from an AC input voltage signal line without developing an inrush current from the AC input voltage line, and a DC/DC converter circuit coupled to the buck/boost circuit for converting the DC voltage to a desired voltage level. The aspects are achieved in a straightforward, cost effective, and adaptable manner.
Claims18
A power converter with power factor correction circuit comprising:
- a buck/boost circuit for achieving a DC voltage from an AC input voltage signal line without developing an inrush current from the AC input voltage line;
- and
- a DC/DC converter circuit coupled to the buck/boost circuit for converting the DC voltage to a desired voltage level.
A method for achieving power factor correction in a power converter, the method comprising:
- providing a buck/boost circuit for achieving a DC voltage from an AC input voltage signal line without developing an inrush current from the AC input voltage line;
- and
- coupling a DC/DC converter circuit to the buck/boost circuit for converting the DC voltage to a desired voltage level.
A buck/boost power factor correction circuit comprising:
- an inverted rectifier bridge coupled to an AC voltage signal line input;
- a first transistor coupled to the inverted rectifier bridge;
- an inductor coupled to the transistor;
- a first diode coupled to the transistor and the inductor;
- a first capacitor coupled to the transistor and the inverted rectifier bridge;
- and
- a buck/boost controller coupled to the capacitor, wherein the circuit converts the AC voltage signal line input to a DC voltage at a desired voltage level, including a voltage level lower than a peak of the AC voltage signal line input without allowing an inrush current to develop.
Dependencies are inferred from the claim text.