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Power supply

  • US 8,558,411 B2
  • Filed: 07/23/2010
  • Issued: 10/15/2013
  • Est. Priority Date: 07/24/2009
  • Status: Active Grant
First Claim
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1. A multi-input wireless power supply comprising:

  • an AC/DC rectifier circuit capable of accepting a first input voltage or a second input voltage, wherein said AC/DC rectifier produces a rectified output;

    a sensor for detecting which of said first input voltage and said second input voltage is connected to said multi-input wireless power supply;

    a plurality of switching circuits each coupled to said rectified output;

    a first tank circuit coupled to one of said plurality of switching circuits, wherein characteristics of said first tank circuit are selected for transferring power to a remote device as a function of said first input voltage;

    a second tank circuit coupled to a different of said plurality of switching circuits, wherein characteristics of said second tank circuit are selected for transferring power to said remote device as a function of said second input voltage, wherein said characteristics of said second tank circuit are different from said characteristics of said first tank circuit;

    a low power DC/DC converter coupled to said AC/DC rectifier for converting said rectified output;

    a microcontroller coupled to said low power DC/DC converter, wherein said microcontroller is programmed to control said plurality of switching circuits based on output from said sensor.

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