Power source apparatus and a system

A power source apparatus comprising:

• a first power source connected to a load, which is configured to operate at a voltage equal to or more than a first voltage, configured to output a second voltage higher than the first voltage to the load;
• a second power source configured to output the second voltage, the second power source being configured to supply power to the load in a case where the first power source is unable to output a predetermined voltage;
• a diode connected to the first power source and the second power source, with an anode of the diode being connected to the output of the first power source, and with a cathode of the diode being connected to the output of the second power source;
• and
• a voltage drop element through which a voltage drop is connected in series between the second power source and the diode,
• wherein a voltage output through the diode and the voltage drop element from the second power source is lower than the second voltage, thereby, when the voltage output from the first power source becomes lower than the voltage output through the diode from the second power source, the diode conducts and power is supplied from the second power source to the load.

A system having a power source apparatus and electric equipment, which includes a plurality of loads, wherein the loads operate by power supplied from the power source apparatus, wherein the power source apparatus comprises:

• a plurality of first power sources connected to the plurality of loads of the electric equipment through respective power supply lines;
• and
• at least one second power source as a sub power source, which is used in a case where at least one first power source of the plurality of first power sources is unable to output a predetermined voltage,
• wherein the second power source, which is provided on an anode side of a diode, is connected in parallel to the power supply line of at least one of the first power source through a diode,
• wherein at least one load of the plurality of loads is configured to operate at a voltage equal to or more than a first voltage,
• wherein the at least one first power source outputs a second voltage that is higher than the first voltage,
• wherein the second power source outputs a third voltage, which is higher than the first voltage, with a voltage output through the diode from the second power source being lower than the second voltage, thereby, in a case where the voltage output from the at least one first power source becomes lower than the voltage output through the diode from the second power source, the diode conducts and power is supplied from the second power source to the at least one load, and
• wherein the electric equipment comprises a controller and a detector configured to detect a voltage supplied to the at least one load, the controller is configured to determine whether the at least one first power source has failed or not based on a detection result of the voltage detected by the detector, and configured to notify, in a case where it is determined that the first power source has failed, information representing that the at least one first power source has failed.