COMMON MODE CHOKE COIL

• Main Author: MATSUURA KOHEI
• Format: Patent
• Language: English; Japanese
• Published: 20.05.2021
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; INDUCTANCES; MAGNETS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS

To provide a common mode choke coil with an excellent noise suppression function.SOLUTION: A common mode choke coil comprises: an element body 10 formed by laminating a plurality of insulation layers in a height direction; a first coil 31 and a second coil 32 which are built in the element body, respectively; a first outer electrode provided on a front surface of the element body and connected to one end of the first coil; a second outer electrode provided at a position opposite to the first outer electrode in a width direction orthogonal to the height direction on the front surface of the element body, and connected to the other end of the first coil; a third outer electrode provided on the front surface of the element body and connected to one end of the second coil; and a fourth outer electrode provided at the position opposite to the third outer electrode in the width direction on the front surface of the element body, and connected to the other end of the second coil. When an inductance of the first coil is set to L1 and an inductance of the second coil is set to L2, the following is satisfied in 1GHz: 100×|L1-L2|/((L1+L2)/2)≤5.SELECTED DRAWING: Figure 2 【課題】ノイズ抑制機能に優れたコモンモードチョークコイルを提供する。【解決手段】コモンモードチョークコイルは、複数の絶縁層が高さ方向に積層されてなる素体１０と、素体に各々内蔵された第１のコイル３１及び第２のコイル３２と、素体の表面上に設けられ、第１のコイルの一端に接続された第１の外部電極と、素体の表面上で上記高さ方向に直交する幅方向において第１の外部電極に対向する位置に設けられ、第１のコイルの他端に接続された第２の外部電極と、素体の表面上に設けられ、第２のコイルの一端に接続された第３の外部電極と、素体の表面上で上記幅方向において第３の外部電極に対向する位置に設けられ、第２のコイルの他端に接続された第４の外部電極と、を備える。第１のコイルのインダクタンスをＬ１、第２のコイルのインダクタンスをＬ２とするとき、１ＧＨｚにおいて、１００×｜Ｌ１−Ｌ２｜／（（Ｌ１＋Ｌ２）／２）≦５、を満たす。【選択図】図２