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POWER MANAGEMENT CIRCUITRY FOR ELECTRONIC DOOR LOCKS

  • US 20120025948A1
  • Filed: 04/06/2009
  • Published: 02/02/2012
  • Est. Priority Date: 04/06/2009
  • Status: Abandoned Application
First Claim
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1. A power management circuit for an electronic door lock, the circuit comprising:

  • a ON/OFF circuit operably connected to generate an initial enable signal in response to a detected keycard;

    a load switch circuit having an operating state determined by the initial enable signal, wherein in response to the initial enable signal representing a detected keycard the load switch circuit is enabled to provide a dc output voltage, wherein if no initial enable signal is present the load switch circuit is disabled such that no dc output voltage is provided; and

    an electronic door lock circuit operably connected to receive dc power when the load switch circuit is enabled, wherein the electronic door lock circuit receives identification input from a keycard reader and generates in response an output that is provided to a locking mechanism, wherein in response to completing a keycard detection operation the electronic door lock circuit generates a turn-off signal that is provided in feedback to the ON/OFF circuit to disable the load switch circuit.

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