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Tuning in a Wireless Power Transmitter

  • US 20170085097A1
  • Filed: 09/23/2015
  • Published: 03/23/2017
  • Est. Priority Date: 09/23/2015
  • Status: Active Grant
First Claim
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1. An apparatus for tuning in a wireless power transmitter, comprising:

  • a transmitter coil configured to generate a magnetic field for wirelessly charging a battery; and

    a set of capacitors arranged in series with the transmitter coil configured to retune the transmitter coil in response to detuning upon placement of a device over the transmitter coil;

    wherein a capacitance value for each of the capacitors in the set is associated with a reactance shift.

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