Journal of Advanced Information Technology and Convergence (한국정보기술학회 영문논문지)

Korean Institute of Information Technology (한국정보기술학회)
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A Fully Digital Controlled Fly-back Single Stage Power Supply Unit for the Wireless Dimming System of LED Lightings

  • Oh, Yongseung (R&D Center, Willings Co. Ltd.) ;
  • In, Chigak (Dept. of Electrical Engineering, Incheon National University) ;
  • Cho, Kyumin (Dept. of Inf. and Comm. Engineering, Yuhan University)
  • Received : 2019.11.30
  • Accepted : 2019.12.21
  • Published : 2019.12.31
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Abstract

This paper presents a fully digital controlled power supply unit for the wireless controlled dimmable LED lighting system. The proposed power supply designed using a fly-back converter, which is directly controlled by a microprocessor. Although the proposed circuit does not sense the AC input current and has not AC input voltage feed-forward, it can achieve a high power factor. The proposed power supply directly regulates the output power for LED loads using the PWM and PFM control of the fly-back converter without additional regulator. For a wireless remote control function, the Zigbee modem is equipped in the proposed power supply. A prototype set-up has been built and tested. Through the experiment with a prototype set-up, the usefulness of the proposed power supply is verified.

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