| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply system 100 saving power when a detection object is monitored by a sensor when a switching power supply is stopped.SOLUTION: A power supply system includes: a switching power supply 20; a small capacity power supply 30 having smaller power capacity than the switching power supply 20; an AD converter 73 which is supplied with power by smoothed voltage Vsm output from the small capacity power supply 30 in a state that the switching power supply 20 is stopped; and a temperature detection section 6 for outputting a detection signal according to an environmental temperature to the AD converter 73. The power supply system further includes a RTC control section 71 for allowing the operation of the AD converter 73 for a period when the detection signal output from the temperature detection section 6 is converted into a digital value every prescribed time in the state that the switching power supply 20 is stopped. |
