| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply device that outputs a stable DC current. SOLUTION: The power supply device 1 includes a phase control circuit 110 including a triac T and an AC/DC converter 20. The AC/DC converter 20 includes a noise filter 121, a DC/DC converter 123, a rectifying circuit 122 connected to the other end of the triac T, a diode D provided between the rectifying circuit 122 and the noise filter 121, and a constant-current circuit 24 provided at a poststage of the rectifying circuit 122. COPYRIGHT: (C)2011,JPO&INPIT
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