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US 7,002,815 B2Granted
Switching type power converter circuit and method for use therein
AssigneeOltronics, Inc.
InventorGabriel Scarlatescu
Life of this patent
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Abstract
A switching type power converter circuit includes a step-down converter circuit, a DC/AC converter circuit coupled to the step-down converter circuit, and a rectifier circuit coupled to the DC/AC converter circuit. In one embodiment, the DC/AC converter operates with near 50% duty cycle and with substantially zero-voltage, substantially minimum current switching in a resonant mode. An auxiliary step down converter may be added. An AC/DC converter front end with a full-wave bridge, an RF filter, and a power factor correction circuit may also be added.
Claims1
Power converter apparatus comprising:
- a step-down converter circuit of switching type having an input port to couple to a supply voltage and having an output port to provide an output voltage at a magnitude that is lower than a magnitude of the supply voltage, and having a control circuit to receive a feedback signal and regulate the magnitude of the output voltage in response thereto;
- a DC/AC converter circuit of switching type having a primary side and a secondary side, the primary side having an input port coupled to the output port of the step-down converter circuit, the secondary side having an output port to provide an AC output voltage;
- a rectifier circuit having an input port and an output port, the input port being coupled to the secondary side of the DC/AC converter circuit, the output port supplying a DC voltage;
- and
- a feedback circuit to generate the feedback signal in response to the output port of the rectifier circuit.
2 more elements
Dependencies are inferred from the claim text.