Power supply control device

A power supply control device comprising:

• a plurality of power supply circuits, including a first, second, and third power supply circuits;
• a micro controller unit having a function A, a function B, and a memory;
• a control circuit that is connected to the micro controller unit and that controls the power supply circuits;
• an output current monitor that monitors output currents of the power supply circuits;
• and
• a storage unit in which any one of a plurality of operation modes for controlling the power supply circuits is settable, wherein
• the control circuit controls the power supply circuits based on the operation mode set in the storage unit and the output currents monitored by the output current monitor,
• the plurality of power supply circuits operate in a plurality of operation modes, including a redundancy mode in which in response to a failure of the first power supply circuit, the control circuit combines currents from the second power supply circuit and the third power supply circuit into a second combined current, and supplies the second combined current to the function A of the microcontroller unit;
• and
• a non-redundancy mode in which:
• the first power supply circuit supplies power to the function A of the microcontroller unit,
• the second power supply circuit supplies power to the function B of the microcontroller unit,
• the third power supply circuit supplies power to the function B of the microcontroller unit and to the memory,
• and in which currents from the first power supply circuit, the second power supply circuit, and the third power supply circuit are combined into a first combined current, and the first combined current is supplied to the microcontroller unit.