| 摘要 |
PROBLEM TO BE SOLVED: To provide a power source unit having structure which can reduce mutual electromagnetic reaction between an inductance element and other circuit components, without a second metal case and without restricting a mounting direction of the inductance element. SOLUTION: This power source unit is equipped with a printed board 1 on which circuit components are mounted, a first and a second FETs 3a and 3b which are mounted on the printed board 1 and have radiation surfaces 2a, 2b almost in parallel with the printed wiring board 1, an inductance element 6 mounted on the same side of the board 1 as the first and second FETs 3a and 3b, and a metal case 5 in which a first and a second protruding parts 5a, 5b having contact surfaces 4a, 4b in close contact with the radiation surfaces 2a, 2b of the first and second FETs 3a and 3b are formed on the internal surface. In the state that the printed 1 is accommodated in the metal case 5, the inductance element 6 is arranged between the first and second FETs 3a and 3b in close contact with the contact surfaces 4a, 4b of the first and the second protruding parts 5a and 5b. |
