Switching type power converter circuit and method for use therein
AssigneeOltronics, Inc.
InventorGabriel Scarlatescu
Life of this patent
Estimating the term…
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.
Claims46
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 rectified voltage;
- and
- a feedback circuit to generate the feedback signal in response to the output port of the rectifier circuit.
Power converter apparatus comprising:
- step-down converter means for receiving a supply voltage and generating an output voltage at a magnitude that is lower than a magnitude of the supply voltage, the step down converter means including means for regulating the output voltage in response to a feedback signal;
- 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 rectified voltage;
- and
- a feedback circuit to generate the feedback signal in response to a signal provided at the output port of the rectifier circuit.
Power converter apparatus comprising:
- step-down converter means for receiving a supply voltage and generating an output voltage at a magnitude that is lower than a magnitude of the supply voltage, the step down converter means including means for regulating the output voltage in response to a feedback signal;
- DC/AC converter means for receiving the output voltage of the step down converter means and providing an AC output voltage;
- rectifier means for coupling to a secondary side of the DC/AC converter means and supplying a rectified voltage;
- and
- feedback means for receiving the rectified voltage of the rectifier means and generating the feedback signal supplied to the step down converter means.
A method comprising:
- receiving a supply voltage and generating a first output voltage having a magnitude that is lower than a magnitude of the supply voltage, where the act of generating comprises regulating the first output voltage in response to a feedback signal;
- generating an AC voltage from the first output voltage;
- rectifying the AC voltage to provide a rectified voltage;
- and
- generating the feedback signal in response to the rectified voltage.
Dependencies are inferred from the claim text.