An object is to reduce the time it takes to switch PWM signals used to perform drive control of a voltage converter. An inverted PWM signal used to perform drive control of a voltage conversion unit (20) is generated based on a result of comparison between a first voltage value and a first target value, and a second PWM signal used to perform drive control of the voltage conversion unit (20) is generated based on a result of comparison between a second voltage value and a second target value. Then, an AND signal or an OR signal is generated, the AND signal being in an ON state when both of the inverted PWM signal and the second PWM signal are in an ON state, the OR signal being in an ON state when at least one of the inverted PWM signal and the second PWM is in an ON state.