Power supply circuit of electrified vehicle

A power supply circuit for mounting on an electrified vehicle including:

• a battery configured to receive an electric power from an external DC power supply;
• an accessory configured to operate at a system voltage of the battery;
• a DC inlet to which a voltage higher than the system voltage is applied from the external DC power supply;
• an electric motor configured to drive the electrified vehicle;
• and a power control unit configured to drive the electric motor, the power supply circuit comprising:
• a first power line configured to connect the DC inlet and the battery;
• a step-up/down converter disposed on the first power line and configured to:
• lower a voltage supplied to the battery from the DC inlet;
• and
• boost a voltage supplied from the battery;
• a second power line having one end connected to the first power line between the step-up/down converter and the battery, and another end connected to the accessory;
• and
• a third power line configured to connect the battery and the power control unit, the third power line being branched from the first power line between the DC inlet and the step-up/down converter.