Packaging structure of a magnetic device
AssigneeCyntec Co., Ltd.
InventorsChun-Tiao Liu, Lan-Chin Hsieh, Tsung-Chan Wu, Chi-Hsun Lee, Chih-Siang Chuang
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Abstract
An inductor is disclosed, the inductor comprising: a T-shaped magnetic core, being made of a material comprising an annealed soft magnetic metal material and having a base and a pillar integrally formed with the base, wherein the volume of the base is V1 and the volume of the pillar is V2; a coil wound on the pillar; and a magnetic body encapsulating the pillar, the coil and a portion of the base, wherein the ratio of V1 to V2 (V1/V2) is configured in a pre-determined range so as to reduce the total core loss of the inductor with the equivalent permeability of the inductor being between 28.511 and 52.949.
Claims11
An inductor comprising:
- a T-shaped magnetic core, being made of a material comprising an annealed soft magnetic metal material and having a base and a pillar integrally formed with the base, the base having a top side and a bottom side opposite to the top side, the pillar being located on the top side of the base, wherein a volume of the base is V1 and a volume of the pillar is V2;
- a coil wound on the pillar;
- and
- a unitary magnetic body encapsulating the pillar, the coil and a portion of the base with a bottom surface of the base being not covered by the unitary magnetic body, wherein a contiguous portion of the unitary magnetic body encapsulates a top surface of the pillar and extends into a gap between a side surface of the pillar and an inner surface of the coil, wherein a ratio of V1 to V2 (V1/V2) is configured in a pre-determined range so as to reduce the total core loss of the inductor with an equivalent permeability of the inductor being between 28.511 and 52.949, wherein V1/V2≤2.533, and the total core loss of the inductor is not greater than 695.02 mW.
Dependencies are inferred from the claim text.