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

  • US 9,431,848 B2
  • Filed: 12/06/2013
  • Issued: 08/30/2016
  • Est. Priority Date: 12/06/2012
  • Status: Active Grant
First Claim
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1. A wireless power receiver for preventing excessive temperature caused by charging, the wireless power receiver comprising:

  • a power receiver configured to receive wireless power in an Alternate Current (AC) form from a wireless power transmitter;

    a regulator configured to regulate the wireless power;

    a power management unit configured to control charging by providing the regulated wireless power to a battery;

    a temperature measurement unit configured to measure a temperature of a point in the wireless power receiver during reception of the wireless power; and

    a controller configured to monitor the temperature of the point in the wireless power receiver by the temperature measurement unit and to provide a control signal for the wireless power receiver to be charged with a regulated charging power if a temperature measured by the temperature measurement unit exceeds a preset temperature,wherein the controller provides the control signal based on a difference between the preset temperature and the measured temperature for regulating charging power if the temperature measured by the temperature measurement unit exceeds the preset temperature,wherein the preset temperature is set below an Over Temperature Protection (OTP) temperature, andwherein the controller provides the control signal according to a sub-range corresponding to the measured temperature among a plurality of sub-ranges between the preset temperature and the OTP temperature.

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