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DEVICES, SYSTEMS, AND METHODS FOR ADJUSTING OUTPUT POWER USING SYNCHRONOUS RECTIFIER CONTROL

  • US 20170025897A1
  • Filed: 03/30/2016
  • Published: 01/26/2017
  • Est. Priority Date: 07/24/2015
  • Status: Active Grant
First Claim
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1. An apparatus for wirelessly receiving power, the apparatus comprising:

  • a receive circuit configured to receive wireless power via a magnetic field sufficient to power or charge a load;

    a tuning circuit comprising a variable reactive element, coupled to the receive circuit, and configured to detune the receive circuit away from a resonant frequency to adjust an output power level to a first output power level; and

    a rectifier electrically coupled to the receive circuit and configured to rectify an alternating current (AC) signal, generated in the receive circuit, to a direct current (DC) signal for supplying power to the load, the rectifier comprising a switch; and

    a drive circuit configured to;

    actuate the switch when a current through the switch satisfies a first non-zero current value; and

    adjust the first non-zero current value to a second non-zero value to adjust the first output power level to a second output power level.

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