Electronic device and multi-wireless transmission power control method based on states of plurality of external electronic devices

An electronic device, comprising:

• a plurality of coils;
• a first power generation circuit electrically connected to at least one of the plurality of coils;
• a second power generation circuit electrically connected to at least one of the plurality of coils;
• and
• a control circuit,
• wherein the control circuit is configured to:
• when approach of a second external electronic device is detected by using at least part of the plurality of coils while first power is provided to a first external electronic device by using a first frequency via the first power generation circuit, for providing the second external electronic device with second power, set a frequency of the second power generation circuit to a second frequency different from the first frequency and set a first voltage of the second power generation circuit to a second voltage which corresponds to the second frequency,
• wherein the second voltage is a voltage capable of compensating for a difference between power provided by using the first frequency of the first power generation circuit and power provided by using the second frequency of the second power generation circuit.