Fluorescent lamp abnormal condition protection and sampling circuit

Fluorescent lamp abnormal condition protection and sampling circuit

  • CN 101,754,551 A
  • Filed: 02/04/2010
  • Published: 06/23/2010
  • Est. Priority Date: 02/04/2010
  • Status: Active Grant
First Claim
Patent Images

1. fluorescent lamp abnormal condition protection and sampling circuit;

  • it is characterized in that;

    a sampling of serial connection choking-winding L0 in the ballast series resonant circuit;

    sampling choking-winding L0 comprises two secondary winding n21 and n22;

    the secondary winding n21 of sampling choking-winding L0 and n22 and rectifier diode D1, D2 connect and compose full-wave rectification;

    voltage constitutes the RC filter circuit through filter capacitor C, filter resistance R after the rectification, and the voltage of full-wave rectification output is through bidirectional trigger diode D output abnormal condition of lamp tube protection operation voltage.

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