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Multimode wireless power receivers and related methods

  • US 10,320,234 B2
  • Filed: 08/02/2013
  • Issued: 06/11/2019
  • Est. Priority Date: 08/02/2013
  • Status: Active Grant
First Claim
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1. A wireless power receiver, comprising:

  • a resonant tank configured to generate an AC power signal responsive to an electromagnetic field transmitted by a wireless power transmitter;

    a rectifier configured to receive the AC power signal and generate a DC output power signal; and

    control logic configured to;

    transmit a first message using a first encoding scheme to the wireless power transmitter;

    in response to the wireless power receiver not receiving a first response to the first message, transmit a second message using a second encoding scheme to the wireless power transmitter;

    receive a second response to the second message from the wireless power transmitter;

    determine a type of the wireless power transmitter based on having received the second response to the second message using the second encoding scheme and using a wireless power transmitter type detector that is configured to determine the type of the wireless power transmitter responsive to an input of the rectifier and the DC output power signal;

    adjust one or more control signals of the rectifier based on the determined type of the wireless power transmitter; and

    cause the resonant tank to reconfigure and adjust a resonant frequency of the resonant tank to match an operating frequency of the wireless power transmitter based on the determined type of the wireless power transmitter.

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