An electronic device, comprising: a coil; an inverter including a plurality of gate inputs, the inverter being electrically connected to the coil; and at least one processor configured to: control the plurality of gate inputs of the inverter in an anti-symmetric manner by applying different turned-on time ratios to the plurality of gate inputs to generate an output power, receive an output power reduction request from an external electronic device; based on receiving the output power reduction request, determine whether a ratio of ON-operations to OFF-operations of the plurality of gate inputs of the inverter is less than or equal to a designated ratio; and based on the ratio of ON-operations to OFF-operations of the plurality of gate inputs of the inverter being less than or equal to the designated ratio, modulate a phase of a voltage input into the plurality of gate inputs of the inverter to generate the output power; wherein the electronic device is configured such that the output power generated by controlling the plurality of gate inputs of the inverter in the anti-symmetric manner is higher than the output power generated by modulating the phase of the voltage input into the plurality of gate inputs of the inverter. a coil; an inverter including a plurality of gate inputs, the inverter being electrically connected to the coil; and at least one processor configured to: control the plurality of gate inputs of the inverter in an anti-symmetric manner by applying different turned-on time ratios to the plurality of gate inputs to generate an output power, receive an output power reduction request from an external electronic device; based on receiving the output power reduction request, determine whether a ratio of ON-operations to OFF-operations of the plurality of gate inputs of the inverter is less than or equal to a designated ratio; and based on the ratio of ON-operations to OFF-operations of the plurality of gate inputs of the inverter being less than or equal to the designated ratio, modulate a phase of a voltage input into the plurality of gate inputs of the inverter to generate the output power; wherein the electronic device is configured such that the output power generated by controlling the plurality of gate inputs of the inverter in the anti-symmetric manner is higher than the output power generated by modulating the phase of the voltage input into the plurality of gate inputs of the inverter. control the plurality of gate inputs of the inverter in an anti-symmetric manner by applying different turned-on time ratios to the plurality of gate inputs to generate an output power, receive an output power reduction request from an external electronic device; based on receiving the output power reduction request, determine whether a ratio of ON-operations to OFF-operations of the plurality of gate inputs of the inverter is less than or equal to a designated ratio; and based on the ratio of ON-operations to OFF-operations of the plurality of gate inputs of the inverter being less than or equal to the designated ratio, modulate a phase of a voltage input into the plurality of gate inputs of the inverter to generate the output power; wherein the electronic device is configured such that the output power generated by controlling the plurality of gate inputs of the inverter in the anti-symmetric manner is higher than the output power generated by modulating the phase of the voltage input into the plurality of gate inputs of the inverter.