Microsemi Corporation

Mike Lewis

Hwangsoo Choi

Shiju Wang

A power supply arrangement constituted of: an isolated power supply having a primary side and a secondary side, the secondary side electrically isolated from the primary side; a common mode choke having a first winding and a second winding wound on a common core, the common mode choke coupled between the primary side of the isolated power supply and an AC mains; and a shielding surrounding the common mode choke, the shielding coupled to a common potential of the secondary side of the isolated power supply.

EMI suppression with shielded common mode choke

A power source constituted of: a power factor corrector controller; an electronically controlled switch responsive to the power factor corrector controller; a first inductor serially connected with the electronically controlled switch and arranged to pass a direct current there through when the electronically controlled switch is closed; a second inductor magnetically coupled to the first inductor and coupled to provide power to a load in a flyback arrangement; a third inductor magnetically coupled to the first inductor, a first end of the third inductor arranged to provide a representation of the voltage level of the direct current when the electronically controlled switch is closed, and to provide a representation of the voltage level of the power provided to the load when the electronically controlled switch is open; and an off time control circuit in communication with the power factor corrector controller and responsive to the third inductor representations.

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Orange, CA, United States of America

Mike Lewis