KIEE International Transaction on Electrical Machinery and Energy Conversion Systems

The Korean Institute of Electrical Engineers (대한전기학회)
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Circuit Design and Performance Analysis of CCFL Dimming Controller With Frequency Modulation

  • Kim, Cherl-Jin (Department of Electrical Engineering, Halla University) ;
  • Ji, Jae-Geun (Department of Electrical Engineering, Halla University) ;
  • Yoon, Shin-Yong (Department of Electrical Engineering, Dongguk University)
  • Published : 2004.12.01
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Abstract

The CCFL dimming control methods are generally used lamp current regulation or average current adjustment method feeding the CCFL inverter. Inverter operation frequency is higher than resonant frequency for safe operation. In this study, we design the half-bridge type series and parallel resonant converter circuit that switches at variable frequency modulation methods to control the output power. This method has advantages such as low EMI and reduced harmonics, and it is convenient for dimming control using a microprocessor. The validity of this study is confirmed from the simulation and experimental results.

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References

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