POWER SUPPLY DEVICE, COMPOSITE ELECTRONIC COMPONENT AND BOARD FOR MOUNTING THE SAME

摘要

The present invention relates to a power supply device which includes a constant power supply unit which supplies constant power by rectifying and smoothing input power, a transformer which is connected to an output side of the constant power supply unit, and a control unit which is connected to a primary wire of the transformer and controls a current flowing in the primary wire of the transformer. The power supply device includes a first terminal which is connected to one end of the primary wire of the transformer, a snubber composite body which includes a first cross section in contact with the first terminal and reduces a surge voltage generated in the primary wire of the transformer, and a second terminal which is in contact with a second cross section of the snubber composite body and is connected to the other end of the primary wire of the transformer.