Fluorescent lamp abnormal condition protection and sampling circuit

Fluorescent lamp abnormal condition protection and sampling circuit

  • CN 101,754,551 B
  • Filed: 02/04/2010
  • Issued: 12/24/2014
  • Est. Priority Date: 02/04/2010
  • Status: Active Grant
First Claim
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1. a fluorescent lamp abnormal condition protection and sampling circuit, it is characterized in that:

  • in ballast series resonant circuit, be connected in series a sampling choking-winding L0, sampling choking-winding L0 comprises two secondary winding n21 and n22, secondary winding n21 and n22 and rectifier diode D1, D2 of sampling choking-winding L0 connect and compose full-wave rectification, rectified voltage forms RC filter circuit through filter capacitor C, filter resistance R, and the voltage that full-wave rectification exports exports abnormal condition of lamp tube protection act voltage through bidirectional trigger diode D;

    The armature winding n1 of described sampling choking-winding L0 is the part of the resonant inductance in ballast series resonant circuit.

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