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TRIAC OR BYPASS CIRCUIT AND MOSFET POWER STEAL COMBINATION

  • US 20140312131A1
  • Filed: 04/23/2013
  • Published: 10/23/2014
  • Est. Priority Date: 04/23/2013
  • Status: Active Grant
First Claim
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1. A power supply unit for a heat, ventilation and air conditioning thermostat, comprising:

  • a triac having an input, a gate and an output;

    a bypass circuit having an input connected to the input of the triac;

    a stealing circuit having an input connected to an output of the bypass circuit; and

    a MOSFET power steal module having an input connected to the output of the triac; and

    wherein the input of the triac and an output of the MOSFET power steal module are primary terminals for connection in a power circuit.

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