INDUCTION HEATING DEVICE

An induction heating device of one embodiment comprises a working coil, an inverter comprising a first switching element and a second switching element and supplying a resonance current to the working coil, a phase sensing circuit outputting a pulse signal that indicates a phase difference between the resonance current and a switching voltage of the second switching element, and a controller calculating a final phase difference between the resonance current and the switching voltage of the second switching element, based on the pulse signal, and adjusting an output power value of the working coil, based on the final phase difference. In one embodiment, the final phase difference may be an average of a plurality of phase differences that is calculated during a predetermined detection duration.