Power conversion module device and power unit using the same
First Claim
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1. A power conversion module device comprising:
- a printed wiring board;
a transformer mounted on said printed wiring board in surface-to-surface contact therewith;
at least one of a primary power element and a secondary power element mounted on said printed wiring board in surface-to-surface contact therewith; and
an external connection terminal provided on said printed wiring board, said external connection terminal being operable to connect components mounted on said printed wiring board to a control circuit part provided on a separate substrate from said printed wiring board, wherein;
said printed wiring board has a structure of a highly heat radiating board having an insulator and a wiring board unitary with a lead frame bonded to each other; and
a metal plate is bonded to a backside of a surface of said insulator having the lead frame.
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Abstract
In a power conversion module device of the present invention, a transformer, a primary power element and a secondary power element are mounted on a printed wiring board in surface-to-surface contact therewith, and no control circuit is mounted thereon. In addition to reducing impedance and loss in the wiring, this constitution improves the voltage waveform of the primary power element. Thus, noise reduction can be achieved. Further, because heat can be transferred to the printed wiring board, heat generated from the transformer, the primary power element and the secondary power element can be reduced. The size of the transformer can also be reduced.
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Citations
26 Claims
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1. A power conversion module device comprising:
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a printed wiring board; a transformer mounted on said printed wiring board in surface-to-surface contact therewith; at least one of a primary power element and a secondary power element mounted on said printed wiring board in surface-to-surface contact therewith; and an external connection terminal provided on said printed wiring board, said external connection terminal being operable to connect components mounted on said printed wiring board to a control circuit part provided on a separate substrate from said printed wiring board, wherein; said printed wiring board has a structure of a highly heat radiating board having an insulator and a wiring board unitary with a lead frame bonded to each other; and a metal plate is bonded to a backside of a surface of said insulator having the lead frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification