Method and apparatus for protecting wireless power receiver from excessive charging temperature

A method of a wireless power receiver, the method comprising:

• receiving power from a wireless power transmitter;
• measuring a temperature of a point in the wireless power receiver during reception of the wireless power;
• regulating the received power;
• identifying the temperature at a first time point;
• maintaining an amount of the regulated power to be provided to a battery with a first level if the identified temperature is lower than a first preset temperature;
• decreasing the amount of the regulated power to a second level which is lower than the first level, if the identified temperature is greater than or equal to the first preset temperature;
• in response to decreasing the amount of the regulated power, identifying the temperature at a second time point after the first time point and maintaining the amount of the regulated power at the second level until the temperature measured by temperature measurement circuitry is lower than the first preset temperature;
• increasing the amount of the regulated power at the second level to the first level if the identified temperature at the second time point is lower than the first preset temperature;
• and
• stopping providing the regulated power to the battery, if the identified temperature is greater than or equal to a second preset temperature which is higher than the first preset temperature.

An electronic device including a wireless power receiver, the electronic device comprising:

• a power receiving circuitry configured to wirelessly receive power from a wireless power transmitter;
• a regulating circuitry configured to regulate the received power;
• a power management circuitry configured to provide the regulated power to a battery of the electronic device;
• a temperature measurement circuitry configured to measure a temperature of a point in the electronic device;
• and
• a controller configured to:
• control an amount of the regulated power at a first level to be maintained if the temperature measured by the temperature measurement circuitry is lower than a first preset temperature,
• control the amount of the regulated power to be decreased to a second level, if the amount of the regulated power is at the first level and the temperature measured by the temperature measurement circuitry is higher than or equal to the first preset temperature, and control the amount of the regulated power to be maintained at the second level until the temperature measured by the temperature measurement circuitry is lower than the first preset temperature,
• control the amount of the regulated power to be increased to the first level if the amount of the regulated power is at the second level and the temperature measured by the temperature measurement circuitry is lower than the first preset temperature, and
• control to stop providing the regulated power to the battery, if the temperature measured by the temperature measurement circuitry is greater than or equal to a second preset temperature which is higher than the first preset temperature.