Power supply control device for maintaining power supply to a load

A power supply control device, comprising:

• a capacitor having one end connected to a current input end of a switch;
• a resistance having one end connected to another end of the capacitor;
• a DC voltage source having a negative terminal connected to a connection node between the capacitor and the resistance;
• the switch disposed in a first current path of a current flowing from a direct-current (DC) power source, the switch configured to turn on so as to supply power from the DC power source to a load;
• a comparison unit configured to compare a voltage value of a current input end of the switch to which the current is inputted with a voltage threshold, wherein the voltage threshold is a voltage value of a positive terminal of the DC voltage source;
• and
• a switching unit configured to turn off the switch when the comparison unit indicates that the voltage value of the current input end is less than the voltage threshold so as to interrupt power from the DC power source to the load,
• wherein the DC power source is configured to supply, via a second current path, power to a starter that starts an engine of a vehicle, and
• the voltage threshold is less than the voltage value of the current input end of the switch in a case where the DC power source supplies the power to the starter;
• and
• wherein the switching unit is further configured to turn off the switch when the comparison unit indicates continuously for at least a predetermined period that the voltage value of the current input end is less than the voltage threshold.