INTEGRATED CHARGER

An integrated charger includes a first isolated charger configured to convert AC voltage input from the outside into first DC voltage for charging a first battery and to provide the converted voltage to the first battery and a second isolated charger including a transformer having a first winding wire connected to a switching circuit of the first isolated charger connected to the first battery and a second winding wire electromagnetically coupled to the first winding wire to convert the magnitude of voltage of the first winding wire and to output the voltage having the converted magnitude and a rectification circuit configured to rectify the voltage of the second winding wire into second DC voltage having a smaller magnitude than the first DC voltage and to provide the rectified voltage to a second battery.