In-vehicle backup control apparatus and in-vehicle backup apparatus

An in-vehicle backup control apparatus to be used in an in-vehicle power supply system including a power supply unit, a power storage unit, and a load, the in-vehicle backup control apparatus being configured to perform a backup operation of supplying electric power from the power storage unit to the load when an electric power path through which electric power from the power supply unit is supplied is in a low-voltage state, the in-vehicle backup control apparatus comprising:

• a switch unit disposed between the power storage unit and the load;
• a control unit that controls the switch unit;
• a low-voltage detection circuit that detects the low-voltage state;
• and
• a latching circuit that is switched to a latched state in which the switch unit is kept in an on state when the low-voltage detection circuit detects the low-voltage state,
• wherein the control unit controls the switch unit to be in the on state when the electric power path is in the low-voltage state.