| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a compact inductance unit using a dust core as an annular magnetic core, having excellent heat radiation with a reduced occupied area to a printed board and capable of reducing man-hour to assemble a switching power supply circuit.SOLUTION: The inductance unit includes a plurality of inductance components and a heat radiation member with a coil laid on a part of the annular magnetic core. The annular magnetic core is constituted by the combination of a plurality of dust cores. In a part having no coil on the annular magnetic core, the outer peripheral surface thereof is disposed opposite to one surface side of the heat radiation member, so that the plurality of inductance components and the heat radiation member are overlaid and secured.</p> |
