| 摘要 |
PROBLEM TO BE SOLVED: To provide a device capable of suppressing a power loss, even when having a plurality of power supply parts.SOLUTION: A power supply device 70 includes a first power supply part 80, a second power supply part 90, a detection circuit 73 detecting the output of the first power supply part 80 and the second power supply part 90, a bypass circuit 75 connected to a current path between the output end of the second power supply part 90 and the input end of the detection circuit 73 in parallel, a bypass control part 74, and a high-voltage control part 71 controlling the operations of the first power supply part 80 and the second power supply part 90. The second power supply part 90 includes a voltage dividing circuit 95 constituting the current path. The bypass control part 74 operates the bypass circuit 75, to cause the current flowing between a second output end B2 and the input end to flow in the bypass circuit 75 and to bypass the voltage dividing circuit 95, when the second power supply part 90 is not operated, but the first power supply part 80 is operated to output a first power supply voltage. |
