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Ground leakage power supply for dimming applications

  • US 9,812,969 B2
  • Filed: 11/26/2014
  • Issued: 11/07/2017
  • Est. Priority Date: 11/26/2014
  • Status: Active Grant
First Claim
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1. A dimmer for controlling power to a load, the dimmer comprising:

  • a phase input terminal configured to couple to an AC power source;

    a ground terminal configured to couple to a ground connection of the AC power source;

    a load output terminal configured to couple to the load;

    a switching circuit electrically coupled between the phase input terminal and the load output terminal;

    a controller configured to control the switching circuit such that power to the load is selectively controlled; and

    a ground leakage power supply, wherein the ground leakage power supply is a switched mode power supply electrically coupled to the phase input and ground terminals, wherein the ground leakage power supply derives power only from the phase input and ground terminals;

    wherein the controller receives power from the ground leakage power supply.

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