Induction heating device performing container sensing function

An induction heating device, comprising:

• an induction heating circuit configured to drive a working coil, the induction heating circuit comprising an inverter unit;
• a sensor configured to measure a current applied to the induction heating circuit;
• and
• a controller configured to control the induction heating circuit based on a current value of the current measured by the sensor,
• wherein the controller comprises:
• a switch driving unit configured to control operation of the inverter unit and to allow a resonance of the current,
• a container sensing unit configured to:
• convert a first current value measured before the resonance into a first voltage value,
• based on conversion of the first current value to the first voltage value, control the switch driving unit to charge the working coil with energy,
• compare the first voltage value with a predetermined resonance reference value,
• convert a second current value measured after the resonance into a second voltage value,
• based on conversion of the second current value into the second voltage value, generate one or more output pulses, and
• compare the second voltage value with a predetermined count reference value, and
• a control unit configured to receive the one or more output pulses from the container sensing unit and to determine whether an object is present on the working coil based on the one or more output pulses.