A coupled inductor has two pillars that are aligned in a vertical direction, wherein a first coil and a second coil are respectively wound around one of the two pillars, respectively, wherein the bottom surface of winding turns of the first coil and the bottom surface of winding turns of the second coil are separated by a gap, wherein a magnetic material is disposed in the gap and a straight line that is enclosed by each of the first coil and the second coil passes through the two pillars.

A reactor including: a coil having a winding portion; a magnetic core that is disposed extending inside and outside the winding portion, and is configured to form a closed magnetic circuit; and a resin mold that includes an inner resin disposed between the winding portion and the magnetic core, and does not cover an outer peripheral face of the winding portion.

An inductor includes a first wire and a second wire, a first magnetic layer containing magnetic particles having an approximately spherical shape, a second magnetic layer containing magnetic particles having an approximately flat shape, and a third magnetic layer containing magnetic particles having an approximately flat shape. The relative permeability of each of the second magnetic layer and the third magnetic layer is higher than the relative permeability of the first magnetic layer. A fourth surface of the first magnetic layer has a second concave portion. A sixth surface of the third magnetic layer has a fourth concave portion.

An inductor includes a first wire adjacent to a second wire and separated by an interval; a first magnetic layer having first and second surfaces separated from each other by an interval, and an inner peripheral surface in contact with an outer peripheral surface of the first and second wires between the first and second surfaces; a second magnetic layer disposed on the first surface; and a third magnetic layer disposed on the second surface. The second magnetic layer has a third surface facing and separated from the first surface by an interval in the thickness direction. The relative permeability of each of the second and third magnetic layers is higher than that of the first magnetic layer. The inductor includes a suppression portion located between the first and second wires which suppresses the magnetic coupling between the first and second wires.

A magnetic device is provided, including an upper magnetic core, a lower magnetic core, a coil, and a permeability member, wherein the permeability member is disposed between the upper magnetic core and the lower magnetic core. The coil is enclosed by the permeability member, and the permeability member is in contact with the upper magnetic core and the lower magnetic core.

An inductor component comprising an element body having laminated insulating layers; a coil in the element body and wound into a helical shape advancing in a lamination direction of the insulating layers; and a substrate on an upper surface of the element body. The coil includes coil wirings along the lamination direction and wound along a plane orthogonal to the lamination direction, and a connection wiring connecting end portions of the coil wirings. The coil wirings include a winding part wound on the plane and a lead-out part from an end portion of the winding part to the connection wiring which is one of connection wirings arranged in the lamination direction. In the lamination direction, a lowest position of an upper surface of the connection wiring of the uppermost layer is lower than a bottom surface of the winding part in the coil wiring of the uppermost layer.

A sandwich structure power supply module, having: an inductor pack having a first inductor and a second inductor; a top PCB (Printed Circuit Board) on top of the inductor pack; and a first power device chip and a second power device chip on top of the top PCB, wherein the first power device chip has at least one pin electrically connected to the first inductor via the top PCB, and the second power device chip has at least one pin electrically connected to the second inductor via the top PCB; wherein each inductor comprises one winding having a first end and a second end, and wherein at least one of the first end and the second end of each winding is bent to and extended at a plane perpendicular to an axis along a length of the winding.

A magnetic device includes two common magnetic legs, a plurality of coupled magnetic legs, and two windings. The first winding includes a first input part, a first intermediate part and a first output part. The second winding includes a second input part, a second intermediate part and a second output part. The first input part is disposed between the first common magnetic leg and the first coupled magnetic leg. The second input part is disposed between the second common magnetic leg and the first coupled magnetic leg. The first intermediate part and the second intermediate part are disposed between every two adjacent coupled magnetic legs. The first output part is disposed between the first common magnetic leg and the last coupled magnetic leg. The second output part is disposed between the second common magnetic leg and the last coupled magnetic leg.

A multi-winding inductor includes a magnetic core including four magnetic columns and a winding assembly including two windings. Each winding includes three portions. The first and third portions of the first winding are respectively between the first and the second magnetic columns, and the third and the fourth magnetic columns; and the first and third portions of the second winding are respectively between the fourth and the first magnetic columns, and the second and the third magnetic columns. Both the first portions of two windings extend to a surface of the magnetic core and respectively form a first and a third pins. The winding is a flat wire with the thickness less than the width, and the width direction is parallel to an extension direction of the first magnetic column.

A multi-winding inductor includes a magnetic core including three magnetic columns and two windings. Each winding includes a first, a second and a third portions. The first magnetic column is arranged between the first portion of the first winding and the first portion of the second winding; the second magnetic column is arranged on one side of the first portion of the first winding and the third portion of the second winding; and the third magnetic column is arranged between the third portion of the first winding and the third portion of the second winding. The first and the second portions of two windings respectively form pins on opposite sides of the magnetic core.