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Filament miswire protection in an electronic dimming ballast

  • US 9,414,472 B2
  • Filed: 09/28/2012
  • Issued: 08/09/2016
  • Est. Priority Date: 09/28/2012
  • Status: Active Grant
First Claim
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1. An electronic ballast for driving a plurality of gas discharge lamps, each gas discharge lamp having a respective filament, the electronic ballast comprising:

  • a filament winding magnetically coupled to an inductor and operable to supply an AC filament voltage to each of the filaments;

    a filament miswire protection element coupled to the filament winding and connectable to the filaments such that the same AC filament voltage is established across a first of the filaments regardless of whether the filaments are wired in series or in parallel.

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