Reverse current protection for power converters having synchronous rectifiers
AssigneeAstec International Limited
InventorsPalanivel Selvaraju, Ronnie A. Bagalay
Life of this patent
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Abstract
A power supply includes an input, an output, a reverse current protection circuit, a synchronous rectifier and an output choke. The reverse current protection circuit is configured for detecting a flyback voltage indicative of reverse current, and for deactivating the synchronous rectifier in response to detecting the flyback voltage. The flyback voltage can be detected a variety of ways, including across the output choke, across a switch in the synchronous rectifier, across the secondary winding of a power transformer, etc.
Claims21
A power supply comprising:
- a plurality of interconnected power supply modules for supplying power to an output load,
- at least one of the power supply modules including a synchronous rectifier, an output choke, and a reverse current protection circuit,
- the reverse current protection circuit configured for detecting a flyback voltage across the output choke, the flyback voltage being indicative of reverse current in the power supply module, and for deactivating the synchronous rectifier in response to detecting the flyback voltage.
The power supply of claim 2 wherein the at least one power supply module further includes an ORing MOSFET.
A power supply comprising:
- a plurality of interconnected power supply modules for supplying power to an output load,
- at least one of the power supply modules including a synchronous rectifier, an output choke, and a reverse current protection circuit,
- the reverse current protection circuit configured for detecting a flyback voltage indicative of reverse current in the power supply module, and for deactivating the synchronous rectifier in response to detecting the flyback voltage.
A power supply comprising:
- at least one power supply module including a synchronous rectifier, an output choke, and a reverse current protection circuit,
- the reverse current protection circuit configured for detecting a flyback voltage indicative of reverse current in the power supply module, and for deactivating the synchronous rectifier in response to detecting the flyback voltage.
Dependencies are inferred from the claim text.