Patent ID: 8917021

Claim:
A power supply apparatus comprising: a first filter and a second filter configured to attenuate a common mode current to a level lower than a normal mode current; a switching power supply connected between the first filter and the second filter, and configured to supply electric power to an illumination load via the second filter; and a DC power supply circuit configured to supply a DC voltage to the switching power supply via the first filter, the DC power supply circuit including: a third filter and a fourth filter configured to attenuate the common mode current to a level lower than the normal mode current; a rectification circuit configured to rectify an AC voltage to generate a DC voltage and output the generated DC voltage to the third filter; a first circuit connected between the third filter and the fourth filter, and configured to perform conversion or power factor control of the DC voltage supplied through the third filter and output the DC voltage to the switching power supply through the fourth filter.