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COMPACT FLUORESCENT LAMP THREE-WAY BALLAST DRIVER

  • US 20150145428A1
  • Filed: 11/25/2013
  • Published: 05/28/2015
  • Est. Priority Date: 11/25/2013
  • Status: Active Grant
First Claim
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1. A compact fluorescent lamp (CFL) ballast driver comprising:

  • a first and a second AC voltage terminal, and a neutral AC voltage terminal;

    a full wave rectifier electrically coupled between the first AC voltage terminal and the neutral AC input terminal;

    the full wave rectifier including a branch electrically coupled between the second AC voltage terminal and the neutral AC input terminal;

    a resonator circuit including at least two inductors, and configured to provide an output voltage to a CFL lamp;

    a first state detector circuit configured to monitor the first AC voltage terminal;

    a second state detector circuit configured to monitor the second AC voltage terminal;

    the first and the second state detector circuits configured to activate respective first and second switches;

    the first switch configured to shunt one inductor of the resonator circuit; and

    the second switch configured to shunt another inductor of the resonator circuit.

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