Charging apparatus capable of reducing low-frequency leakage current

A charging apparatus capable of reducing low-frequency leakage current, the charging apparatus comprising:

• a power factor correction converter including a switch and converting an AC power inputted by an on/off control of the switch into a DC power by correcting a power factor of the AC power;
• a DC-DC converter changing a magnitude of voltage outputted from the power factor correction converter into a magnitude of voltage required by an energy storage device to be charged;
• first and second Y-capacitors connected respectively between a ground and positive (+) and negative (−) terminals of an output terminal of the DC-DC converter;
• a first duty controller determining a first duty value of the switch for outputting a voltage having a predetermined magnitude through the power factor correction converter based on a magnitude of a differential mode component of the AC power;
• and
• a second duty controller determining a second duty value of the switch for a voltage of the first or second Y-capacitor into a DC voltage,
• wherein the on/off control of the switch is performed based on a final duty value obtained by summing the first duty value and the second duty value.