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

  • US 7,863,832 B2
  • Filed: 01/21/2009
  • Issued: 01/04/2011
  • Est. Priority Date: 09/28/2004
  • Status: Active Grant
First Claim
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1. An emergency lighting unit comprising:

  • a converter capable of receiving a wide range of input voltages, the wide range of input voltages comprising at least three different input voltages; and

    a brownout detection component capable of detecting a brownout condition by comparing an input voltage received by the converter with a brownout threshold value determined using a sample actual voltage level of the input voltage, wherein the brownout threshold value has different values where the sample actual voltage level corresponds to different ones of the at least three different input voltages.

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