Power-supply control apparatus and overcurrent detection method

A power-supply control apparatus comprising:

• a current sensor including a magnetic sensor that detects, using a magnetoresistive element, magnetism generated when a current to be measured flows through a bus bar, the current sensor being capable of measuring the current to be measured;
• and
• a determination unit that determines whether an overcurrent has flowed through the bus bar,
• wherein the determination unit measures a current increase time, the current increase time being a time required for an output voltage of the current sensor to rise from 0 to a maximum value, and a current decrease time, the current decrease time being a time required for the output voltage of the current sensor to fall from the maximum value to 0, obtains a current increase/decrease time difference that is a difference between the current increase time and the current decrease time, and determines whether the overcurrent has flowed through the bus bar based on the current increase/decrease time difference.