Power supply apparatus

摘要

The power supply includes an output unit that converts a DC voltage and outputs the DC voltage; a capacitor that stabilizes the DC voltage output from the output unit, the power supply being able to be operated in a power saving mode in which a power consumption is reduced by stopping a whole or part of an operation of a load operated by the DC voltage output from the output unit; a detection unit that detects that a power is cut off; a discharging load that discharges the capacitor; and a control unit that performs control so as to operate the charging load when the detection unit detects that the power is cut off during the operation in the power saving mode.

主权项

1. A power supply apparatus comprising:
an output unit that converts a first DC voltage input into a second DC voltage lower than the first DC voltage, and outputs the second DC voltage; a capacitor that smoothes the second DC voltage as a smoothed second DC voltage; a detection unit that detects that a power is cut off from a commercial power source; and a control unit that is capable of setting a mode of the power supply apparatus to a non-voltage-applying mode in which the smoothed second DC voltage is not applied to a load to which the smoothed second DC voltage can be applied; and a protection unit that stops the first DC voltage from being input to the output unit in a case where the second DC voltage is higher than the first DC voltage, wherein the control unit, in a case where the detection unit detects that the power is cut off in the non-voltage-applying mode, applies the smoothed second DC voltage into the load to which the smoothed second DC voltage is not applied in the non-voltage-applying mode so as to discharge charges in the capacitor, so that a condition is maintained in which the second DC voltage is lower than the first DC voltage.