| 摘要 |
PROBLEM TO BE SOLVED: To radiate heat of the part of a power system circuit, which is heated, at a low cost, regarding an electronic circuit device comprising a small-power system circuit and the power system circuit. SOLUTION: An electronic circuit device 100 comprises the small-power system circuit 124 which, formed on a ceramic board 150, comprises a small- power type 151, and the power system circuit 121 and 122 which are, comprising mainly a large-power type part 170, respectively, formed on a bus bar unit 160 in which a conductor 163 is provided to a support body 161 comprising an insulating material. The small-power system circuit is provided at the bottom surface 112 of a box-like metal case 110. The bus bar unit comprising the power system circuit is provided away from the small-power system circuit. The small- power system circuit is electrically connected to the power system circuit. A part 171 such as a power semiconductor which is heated among the large-power type parts is fixed to the metal case through adhesives 180 and 190 of insulating characteristics and high heat transfer characteristics. |
