Patent ID: 9456530
Filing Date: 2016-09-27
CPC Classification: H02M,H05K

Claim Text:
1. A DC-DC converter, comprising: a transformer having a primary coil and a secondary coil; switching elements connected to the primary coil for switching the flow of electrical current to the primary coil; rectifying elements connected to the secondary coil; a case having (i) a first accommodating portion in which the transformer is accommodated and (ii) a second accommodating portion in which the switching elements and the rectifying elements are accommodated; and a metal heat sink attached to the case, the metal heat sink being thermally connected to the switching elements and the rectifying elements and having a radiator portion exposed on an outer surface of the case; wherein the case includes a lower case opened upward, an inner cover that covers the first accommodating portion formed in the lower case from above, and an upper cover that covers the lower case and the inner cover from above, the lower case is provided with inlet ports, the inlet ports placing the first accommodating portion in fluid communication with an exterior environment of the case, the inner cover is provided with inner cover outlet ports, the inner cover outlet ports being configured to provide fluid communication between: (i) a first space inside the first accommodating portion, and (ii) a second space inside the inner cover that is separate from the first space, and the upper cover is provided with outlet ports, the outlet ports placing the first accommodating portion in fluid communication with the exterior environment of the case.