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Equipment and methods for emergency lighting that provides brownout detection and protection

  • US 20070086128A1
  • Filed: 12/06/2006
  • Published: 04/19/2007
  • Est. Priority Date: 09/28/2004
  • Status: Active Grant
First Claim
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1. A method of determining a brownout threshold for use in providing emergency lighting comprising:

  • providing a circuit configured to operate over a wide range of input voltages;

    connecting the circuit to an input voltage with an expected voltage level, wherein the expected voltage level is a discrete voltage level within the wide range of voltages;

    sampling an actual voltage level of the input voltage; and

    in response to sampling the actual input voltage level, automatically establishing a brownout threshold based on the sampled input voltage level and not based on the expected voltage level.

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