Abstract: A coil electronic component includes a body including an internal coil including first and second end portions, and an encapsulant surrounding the internal coil and formed of a magnetic material, and first and second external electrodes disposed on external surfaces of the body. The body includes a first surface and a second surface to which the first and second end portions are led, respectively, and which oppose each other, a third surface connecting the first and second surfaces to each other and perpendicular to a center of a core of the internal coil, and a fourth surface opposing the third surface, and a first corner connecting the first surface and the third surface to each other and a second corner connecting the second surface and the third surface to each other include first and second recess portions, respectively.

Abstract: An inductor includes a body including a support member, a coil, and an encapsulant encapsulating the support member and the coil and external electrodes disposed on an external surface of the body and connected to the coil, wherein the support member includes a through-hole and a via hole spaced apart from the through-hole, the coil includes a first coil disposed on one surface of the support member and a second coil disposed on the other surface of the support member opposing the one surface, the first and second coils are connected to each other by a via filling the via hole, and the via continuously covers an end surface of the first coil and an upper surface of the second coil.

Abstract: An inductor component includes a core including a substantially column-shaped shaft and a support formed on an end portion of the shaft, a terminal electrode formed on the support, and a cover member that covers at least an upper face of the shaft. A width dimension of the inductor component including the core and the terminal electrode is greater than a width dimension of the cover member.

Abstract: A voltage converter comprises a second controller as a power switch of the secondary side of the transformer for comparing a detection voltage representing an output voltage and/or load current with a first reference voltage and generating a control signal, and a coupling element for transmitting the control signal generated by the second controller to the first controller on the primary side of the transformer enabling the first controller to generate a first pulse signal driving the power switch to control the on/off state of the primary side winding.

Abstract: A core body includes a central iron core, an outer peripheral iron core surrounding the central iron core, and a single hoop material wound body formed by winding a hoop material. At least three iron portions of an outer circumferential surface of the hoop material wound body are bent radially inward thereof. The central iron core includes at least three iron cores, each of which having a cut tip, is made by cutting at least three projection portions of the hoop material wound body. Each of the at least three projection portions is located between the at least three portions.

Abstract: An electronic component includes a body having an internal electrode disposed therein, and an external electrode disposed on the body and connected to the internal electrode, wherein in a cross section of the body cut in length and thickness directions, the external electrode includes a first electrode layer disposed below the body and a second electrode layer covering at least the first electrode layer and a side portion of the body, and the internal electrode is connected to the second electrode layer through the side portion of the body.

Abstract: A planar transformer for power transmission, having vertical and horizontal extents, includes a circuit board having a sandwich-type structure with at least three layers to form electrical conductors. First and second layers of these layers form outer layers of the circuit board, and each additional one of these layers forms an inner layer of the circuit board. An insulation material with a minimum thickness is arranged between all of these layers, with a number of at least three mutually galvanically isolated circuits. A first circuit forms a primary circuit and each additional circuit forms an equally entitled secondary circuit, having a magnetic core assembled from two interconnected magnetic core parts. A first core part with a central part and two outer legs forms a U shape. The circuit board has two recesses, and the two outer legs of the first core part are inserted into these recesses and connected to the second core part at their ends remote from the central part.

Abstract: A pulse transformer includes a drum core having a winding core, a first flange provided at one end of the winding core in a first direction, and a second flange provided at the other end of the winding core in the first direction. The pulse transformer also includes a plurality of the first electrodes provided in the first flange and arranged in a second direction substantially perpendicular to the first direction, a plurality of second electrodes provided in the second flange and arranged in the second direction, and a plurality of wires wound around the winding core. A length of the pulse transformer in the first and second directions are substantially equal, and a length of the pulse transformer in a third direction substantially perpendicular to the first and second directions is smaller than the length of the pulse transformer in the first and second directions.

Abstract: An electromagnetic coil with improved insulation properties at high temperatures. A bobbin is insulated by a thin ceramic composite layer that is produced by winding a glass or ceramic fiber over the support structure and impregnating it with a pre-ceramic polymer. The pre-ceramic polymer is then modified to form a ceramic SiO2 matrix around the fibrous layer. The ceramic matrix secures the glass or ceramic fibers in place and produces a dense layer. A ceramic coated magnet wire is then wound around the insulated support structure. The magnet wire is a conductor that is spiral-wrapped with a glass fiber impregnated with a pre-ceramic polymer.

Abstract: A coil component including a multilayer body, at least one coil provided inside the multilayer body, and outer electrodes disposed on at least one surface of the multilayer body. The multilayer body includes a first magnetic layer, an insulating layer laminated on the first magnetic layer, and a second magnetic layer laminated on the insulating layer. The coil has, at both ends thereof, lead-out portions, each of which extends up to the surface of the multilayer body and is connected to a respective one of the outer electrodes. The outer electrodes are each present over surfaces of the first magnetic layer, the insulating layer, and the second magnetic layer, and a width of a portion of at least one of the outer electrodes contacting the insulating layer is larger than widths of each of portions of that outer electrode contacting the first and second magnetic layers.

Abstract: A device includes a first inductor and a second inductor reversely coupled with the first inductor, wherein the first and second inductors have overlapping windings. The device also includes a housing for the first and second inductor, wherein the housing is filled with a magnetic molding compound.

Abstract: An inductor includes: a body in which a plurality of insulating layers on which a plurality of coil patterns are arranged are stacked; and first and second external electrodes disposed on an external surface of the body, wherein the plurality of coil patterns are connected to each other through a coil connection portion and form a coil having both ends connected to the first and second external electrodes through a coil withdrawal portion, and wherein the coil connection portion is configured as a material having a higher thermal expansion coefficient than that of the insulating layers.

Abstract: A planar coil element of the present invention includes an insulating base film having a first surface and a second surface opposite to the first surface, a first conductive pattern deposited on the first surface side of the insulating base film, and a first insulating layer covering the first conductive pattern on the first surface side, in which the first conductive pattern includes a core body and a widening layer deposited by plating on the outer surface of the core body, and the ratio of the average thickness of the first conductive pattern to the average circuit pitch of the first conductive pattern is ½ or more and 5 or less.

Abstract: An inductor includes a coil including a winding portion and a lead-out portion, a body constituted by a magnetic member and enclosing the coil, a protection layer disposed on a surface of the body, and an outer electrode. The body has a bottom surface, a top surface, two end surfaces, two side surfaces, and first and second R-chamfered sections. The outer electrode includes first and second electrode regions. The first electrode region is located on the bottom surface and is electrically connected to the lead-out portion. The second electrode region is located on the protection layer on each end surface. The surface roughness of part of the bottom surface where the first electrode region is disposed is greater than that of the protection layer on each of the end surfaces where the second electrode region is disposed.

Abstract: Disclosed herein is a coil component that includes a substrate having a first surface and a first spiral coil spirally wound in a plurality of turns formed on the first surface of the substrate. Each of the turns has a first circumference region in which a radial position is substantially fixed and a first shift region in which a radial position is shifted. Each of inner and outer peripheral ends of the first spiral coil is positioned at the first shift region.

Abstract: A transformer winding structure for enhancing winding stability includes a wire frame having a first winding area and a second winding area, a first wire group wound in the first winding area, a second wire group wound in the second winding area, and a third wire group wound in the second winding area and wound in an overlaying manner on the second wire group. The wire frame forms the first winding area and the second winding area by a first plate, a second plate, and a winding column connected to the first plate and the second plate and having a spacer portion. The second plate comprises at least one protrusion protruding from the second plate toward the first plate. The second wire group and the third wire group approach the spacer portion when passing through the position of the protrusion.

Abstract: A reactor includes a plurality of iron cores and a winding wound on any of the plurality of iron cores; a gap is formed between two iron cores facing against each other; a gap-facing surface of one iron core has an area larger than that of a gap-facing surface of the other iron core.

Abstract: A magnetic film includes a first layer having a real part of complex magnetic permeability of 50 or more and an imaginary part of complex magnetic permeability of below 30 at 10 MHz, and a second layer provided on the first layer and having a real part of complex magnetic permeability of 50 or more and an imaginary part of complex magnetic permeability of 30 or more at 10 MHz.

Abstract: A coil component has a winding core part, and a plurality of wires that are wound on the winding core part to form a plurality of layers. The wires each include a conductor and a covering film that covers the conductor, an outer diameter of the wire of an n-th layer (“n” is an integer that is two or greater) is smaller than an outer diameter of the wire of an (n?1)th layer, an outer diameter of the conductor of the wire of the n-th layer is equal to an outer diameter of the conductor of the wire of the (n?1)th layer, and a thickness of the covering film of the wire of the n-th layer is smaller than a thickness of the covering film of the wire of the (n?1)th layer.

Abstract: A magnetic connector assembly has two independent magnetic components sharing a common core structure. The magnetic assembly includes first and second bobbins, and includes a magnetic core. The magnetic core includes first and second core halves, each half including a main core body, a first outer leg, a second outer leg, and a middle leg. The first outer leg fits within a passageway of the first bobbin. The second outer leg fits within a passageway of the second bobbin. The middle leg fits between the two bobbins.