Patent Number: 7,786,711

Title: Auxiliary turn-on mechanisms for reducing conduction loss in body-diode of low side MOSFET of coupled-inductor DC-DC converter

Abstract: Conduction loss in the body-diode of a low side MOSFET of a power switching stage of one phase of a coupled-inductor, multi-phase DC-DC converter circuit, associated with current flow in the output inductor of that one phase that is induced by current flow in a mutually coupled output inductor of another phase, during normal switching of that other stage, is effectively prevented by applying auxiliary MOSFET turn-on signals, that coincide with the duration of the induced current, to that low side MOSFET, so that the induced current will flow through the turned-on low side MOSFET itself, thereby by-passing its body-diode.

Inventors: Wei; Jia (Cary, NC), Xing; Kun (Cary, NC)

Assignee: Intersil Americas Inc.

International Classification: G05F 1/613 (20060101); G05F 1/00 (20060101)

Expiration Date: 8/31/12018