Koninklijke Philips Corporation N.v.

International Rectifier Corporation

Nai-chi Lee

Demetri J Giannopoulos

Wenkai Wu

George J Schuellein

Laurence Bourdillon

A multi-phase converter comprising 2N+1 inductors; and 2N+1 switching converters parallel connected and each including a switched node; wherein N is an even integer, a pair of said inductors are coupled and wound about a common core and each said coupled inductor is connected at one pole thereof to a respective switched node and at another pole thereof to an output node, and at least one of said inductors is uncoupled from the other inductors.

Multi-phase buck converter with a plurality of coupled inductors

A bi-directional flyback circuit includes a primary side switch that regulates the re-circulated energy to achieve substantially zero voltage switching (ZVS) and a secondary-side switch that regulates the output voltage. No feedback circuit between an output side and an input side of the bi-directional flyback circuit is needed for regulating the output voltage. The amount of recirculating energy required to achieve ZVS, and to maintain output regulation is kept substantially at a minimum.

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Exeter, RI, United States of America

Nai-chi Lee