POWER SUPPLY UNIT AND LIGHTING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a power supply unit capable of suppressing generation of an electromagnetic interference wave.SOLUTION: The power supply unit includes a first filter, a second filter, and a switching power supply. The first filter and the second filter attenuate a common mode current more than a normal mode current. The switching power supply is connected between the first filter and the second filter and supplies electric power to a lighting load through the second filter.