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Distortion Due to the Zero Current Detection Circuit in High Power Factor Quasi-Resonant Flybacks

Author

Listed:
  • Claudio Adragna

    (Industrial and Power Conversion Division Application Laboratory, STMicroelectronics S.R.L, 20864 Agrate Brianza, Italy)

  • Giovanni Gritti

    (Industrial and Power Conversion Division Application Laboratory, STMicroelectronics S.R.L, 20864 Agrate Brianza, Italy)

  • Santi Agatino Rizzo

    (Department of Electrical, Electronic and Computer Engineering, University of Catania, 95125 Catania, Italy)

  • Giovanni Susinni

    (Department of Electrical, Electronic and Computer Engineering, University of Catania, 95125 Catania, Italy)

Abstract

In a high-power factor quasi-resonant Flyback, an ideal zero current detection (ZCD) circuit and control circuitry enable the power switch turn-on in the exact instant a zero ringing current is reached after demagnetization. A nonzero current at the turn-on instant affects the input current shape and; consequently, affects its Total Harmonic Distortion (THD). This paper firstly deeply analyzes the effect on the distortion due to a nonideal ZCD circuit. After, some typical implementations of the ZCD circuit and their effect on the THD are analyzed, identifying their pros and cons. Finally, some experimental results are obtained to validate the analytical investigation.

Suggested Citation

  • Claudio Adragna & Giovanni Gritti & Santi Agatino Rizzo & Giovanni Susinni, 2021. "Distortion Due to the Zero Current Detection Circuit in High Power Factor Quasi-Resonant Flybacks," Energies, MDPI, vol. 14(2), pages 1-26, January.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:2:p:395-:d:479180
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    References listed on IDEAS

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    1. Mahmoud Nassary & Mohamed Orabi & Manuel Arias & Emad M. Ahmed & El-Sayed Hasaneen, 2018. "Analysis and Control of Electrolytic Capacitor-Less LED Driver Based on Harmonic Injection Technique," Energies, MDPI, vol. 11(11), pages 1-18, November.
    2. Ming-Chang Tsou & Ming-Tse Kuo, 2020. "Optimal Combination Design of a Light Emitting Diode Matrix Applicable to a Single-Stage Flyback Driver," Energies, MDPI, vol. 13(19), pages 1-16, October.
    3. Yeu-Torng Yau & Kuo-Ing Hwu & Kun-Jie Liu, 2020. "AC–DC Flyback Dimmable LED Driver with Low-Frequency Current Ripple Reduced and Power Dissipation in BJT Linearly Proportional to LED Current," Energies, MDPI, vol. 13(16), pages 1-18, August.
    4. Claudio Adragna & Giovanni Gritti & Angelo Raciti & Santi Agatino Rizzo & Giovanni Susinni, 2020. "Analysis of the Input Current Distortion and Guidelines for Designing High Power Factor Quasi-Resonant Flyback LED Drivers," Energies, MDPI, vol. 13(11), pages 1-24, June.
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