Charging control device for electric vehicle

A charging control device of an electric vehicle comprising:

• a charge sequence port to which a charging sequence signal is input from a connector of a charging cable;
• a first power supply configured to provide a first driving voltage;
• a first controller driven based on the first driving voltage, configured to periodically repeat a wake-up state and a sleep state, and to generate a wake-up signal when the charging sequence signal is input to the charge sequence port in the wake-up state;
• a second controller configured to operate in a wake-up state when the wake-up signal is generated during maintaining of a sleep state, and to control a charging operation of the electric vehicle in the wake-up state;
• a second power supply disposed between the first controller and the second controller, and configured to provide a second driving voltage to the second controller when the wake-up signal is generated;
• an opto-coupler disposed between the charge sequence port and the first power supply, and driven based on the first driving voltage to receive the charging sequence signal;
• and
• a coupler switch disposed between the opto-coupler and the first power supply and turned on/off according to the control of the first controller,
• wherein the charging sequence signal is selectively received in the wake-up state of the first controller.