Power converter switch control
AssigneeO2Micro International Limited
InventorsLaszlo Lipcsei, Catalin Popovici
Life of this patent
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Abstract
A power converter includes a transformer having a primary winding and a secondary winding, and a plurality of switches coupled to the primary and secondary winding, the plurality of switches responsive to at least one control signal to short both the primary and secondary winding during a first reset time interval. An electronic device including such a power converter and related methods are also provided. A power converter having a plurality of DC to DC converters coupled in parallel is also provided.
Claims12
A power converter including a full bridge, a transformer, and a rectifier circuit, wherein said power converter is configured to:
- receive a first control signal to control a state of a first high side switch coupled to a first path of said full bridge circuit;
- receive a second control signal to control a state of a second high side switch coupled to a second path of said full bridge circuit, said full bridge circuit coupled across a primary winding of said transformer;
- receive a third control signal to simultaneously control a state of a first low side switch coupled to said first path of said full bridge circuit and a state of a first rectifier switch of said rectifier circuit over an entire operating cycle, said first rectifier switch coupled to one end of a secondary winding of said transformer;
- and
- receive a fourth control signal to simultaneously control a state of a second low side switch coupled to said second path of said full bridge circuit and a state of a second rectifier switch of said rectifier circuit over said entire operating cycle, said second rectifier switch coupled to an opposite end of said secondary winding of said transformer.
A controller for controlling a DC to DC converter including a full bridge, a transformer, and a rectifier circuit, wherein said controller is configured to:
- generate a first control signal to control a state of a first high side switch coupled to a first path of said full bridge circuit;
- generate a second control signal to control a state of a second high side switch coupled to a second path of said full bridge circuit, said full bridge circuit coupled across a primary winding of said transformer;
- generate a third control signal to simultaneously control a state of a first low side switch coupled to said first path of said full bridge circuit and a state of a first rectifier switch of said rectifier circuit over an entire operating cycle, said first rectifier switch coupled to one end of a secondary winding of said transformer;
- and
- generate a fourth control signal to simultaneously control a state of a second low side switch coupled to said second path of said full bridge circuit and a state of a second rectifier switch of said rectifier circuit over said entire operating cycle, said second rectifier switch coupled to an opposite end of said secondary winding of said transformer.
An electronic device, comprising:
- a power converter including a full bridge, a transformer, and a rectifier circuit, wherein said power converter is configured to:
- receive a first control signal to control a state of a first high side switch coupled to a first path of said full bridge circuit;
- receive a second control signal to control a state of a second high side switch coupled to a second path of said full bridge circuit, said full bridge circuit coupled across a primary winding of said transformer;
- receive a third control signal to simultaneously control a state of a first low side switch coupled to said first path of said full bridge circuit and a state of a first rectifier switch of said rectifier circuit over an entire operating cycle, said first rectifier switch coupled to one end of a secondary winding of said transformer;
- and
- receive a fourth control signal to simultaneously control a state of a second low side switch coupled to said second path of said full bridge circuit and a state of a second rectifier switch of said rectifier circuit over said entire operating cycle, said second rectifier switch coupled to an opposite end of said secondary winding of said transformer;
- and
- a controller for controlling said power converter, wherein said controller is for providing said first, second, third, and fourth control signals.
Dependencies are inferred from the claim text.