Power supply control circuit and power supply control method

A power supply control circuit configured to output a control value to a power unit of a power supply, the power supply control circuit comprising:

• a voltage control unit configured to operate in a voltage control mode for outputting the control value such that a voltage measurement value of the power supply is a voltage target value;
• a current control unit configured to operate in a current control mode for outputting the control value such that a current measurement value of the power supply is a current target value;
• a selection unit connected to output sides of the voltage control unit and the current control unit and configured to output the control value in either one of the voltage control mode and the current control mode;
• an auxiliary current control unit configured to operate in an auxiliary current control mode for outputting the control value in such a way as to reduce an error between a predetermined current command value and the current measurement value;
• and
• a compound unit connected to output sides of the selection unit and the auxiliary current control unit and configured to output, to the power unit, the control value in a control mode output by the selection unit when the power supply is turned on, and output, to the power unit, the control value in the auxiliary current control mode when the power supply is turned off.