Patent ID: 7893806

Claim:
An N-phase coupled inductor, comprising: a magnetic core having a bottom surface and forming N−1 passageways, N being an integer greater than one, the magnetic core including: a first end magnetic element, a second end magnetic element, and N legs, each of the N legs connecting the first and second end magnetic elements, each of the N−1 passageways partially defined by a respective pair of the N legs, each passageway having a respective depth along an axis extending between the first and second end magnetic elements, each passageway having a respective width along an axis extending between a respective pair of the N legs partially defining the passageway, for each passageway, the respective width of the passageway being greater than the respective depth of the passageway; and N windings, each winding wound at least partially around a respective one of the N legs; each winding being wound through at least one of the N−1 passageways.