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METHOD FOR PERFORMING WIRELESS CHARGING CONTROL WITH AID OF ADMITTANCE DETECTION, AND ASSOCIATED APPARATUS

  • US 20150198640A1
  • Filed: 12/03/2014
  • Published: 07/16/2015
  • Est. Priority Date: 01/16/2014
  • Status: Active Grant
First Claim
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1. A method for performing wireless charging control, the method being applied to a wireless charging transmitter, the method comprising the steps of:

  • performing current detection and voltage detection to monitor a driving current and a driving voltage within the wireless charging transmitter, respectively, wherein the driving current and the driving voltage are utilized for driving a power output coil of the wireless charging transmitter;

    generating a set of indexes at least according to the driving current and the driving voltage, wherein the set of indexes comprises a power loss index indicating power loss of a wireless charging operation performed by the wireless charging transmitter, and further comprises an admittance-related index corresponding to any of a ratio of the driving current to the driving voltage or a reciprocal of the ratio of the driving current to the driving voltage; and

    performing wireless charging foreign object detection (FOD) according to the set of indexes.

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