An electronic device comprising: a display including at least a portion viewable through a first surface of the electronic device; a conductive coil disposed between the display and a second surface opposite the first surface in the electronic device; a wireless charging circuit electrically connected to the conductive coil; a power management circuit connected to the wireless charging circuit; a battery connected to the power management circuit; and a processor operatively connected to the display and the power management circuit, wherein the processor is configured to control the electronic device to: measure a current, lout, flowing from the power management circuit to the wireless charging circuit while power is transferred to an external device through the conductive coil, determine whether the measured current, lout, exceeds a first threshold value and a second threshold value, the second threshold value being greater than the first threshold value, determine whether a power request signal requesting addition of power being transferred is received from the external device, and increase, in response to the determination that a value of the measured current, lout, is between the first threshold value and the second threshold value and the determination that the power request signal is received, a part of an amount of power set in the received power request signal, wherein the second threshold value is equal to a maximum allowable current value, lout_max, of the current flowing from the power management circuit to the wireless charging circuit. a display including at least a portion viewable through a first surface of the electronic device; a conductive coil disposed between the display and a second surface opposite the first surface in the electronic device; a wireless charging circuit electrically connected to the conductive coil; a power management circuit connected to the wireless charging circuit; a battery connected to the power management circuit; and a processor operatively connected to the display and the power management circuit, wherein the processor is configured to control the electronic device to: measure a current, lout, flowing from the power management circuit to the wireless charging circuit while power is transferred to an external device through the conductive coil, determine whether the measured current, lout, exceeds a first threshold value and a second threshold value, the second threshold value being greater than the first threshold value, determine whether a power request signal requesting addition of power being transferred is received from the external device, and increase, in response to the determination that a value of the measured current, lout, is between the first threshold value and the second threshold value and the determination that the power request signal is received, a part of an amount of power set in the received power request signal, wherein the second threshold value is equal to a maximum allowable current value, lout_max, of the current flowing from the power management circuit to the wireless charging circuit. measure a current, lout, flowing from the power management circuit to the wireless charging circuit while power is transferred to an external device through the conductive coil, determine whether the measured current, lout, exceeds a first threshold value and a second threshold value, the second threshold value being greater than the first threshold value, determine whether a power request signal requesting addition of power being transferred is received from the external device, and increase, in response to the determination that a value of the measured current, lout, is between the first threshold value and the second threshold value and the determination that the power request signal is received, a part of an amount of power set in the received power request signal, wherein the second threshold value is equal to a maximum allowable current value, lout_max, of the current flowing from the power management circuit to the wireless charging circuit.