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Methods and apparatus for power loss calibration in a wireless power system

  • US 10,530,196 B2
  • Filed: 01/19/2017
  • Issued: 01/07/2020
  • Est. Priority Date: 02/05/2016
  • Status: Active Grant
First Claim
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1. An integrated circuit, comprising:

  • a communication and control unit including;

    a control unit for controlling an inverter, the inverter configured to convert an input voltage to an alternating current output signal for application to a transmission coil for reception by a receiver; and

    a communication unit for demodulating transmissions from the receiver;

    the control unit configured to cause the inverter to provide a first transmit power to the transmission coil and the communication unit configured to receive a first power received signal from the receiver in response to the first transmit power, the control unit further configured to cause the inverter to provide a second transmit power to the transmission coil and the communication unit configured to receive a second power received signal from the receiver in response to the second transmit power;

    the communication and control unit using the first transmit power, the first power received signal, the second transmit power and the second power received signal to determine a first gain and a first offset, in which, when a third transmit power greater than the second transmit power is transmitted by the transmission coil and a third power received signal is received by the communication unit from the receiver in response to the third transmit power, the communication and control unit determines a second gain and a second offset using the first transmit power, the first power received signal, the third transmit power and the third power received signal.

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