The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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4-Channel LED Current Balancing Scheme Using C-Fed Hybrid Quasi-Z-Source Converter

전류형 하이브리드 Quasi-Z-Source 컨버터를 이용한 4-채널 LED 전류 밸런싱 기법

  • Hong, Daheon (School of Energy Engineering, Kyungpook National University) ;
  • Cha, Honnyong (School of Energy Engineering, Kyungpook National University)
  • Received : 2020.11.23
  • Accepted : 2020.12.24
  • Published : 2021.02.20
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Abstract

This study presents a novel four-channel light-emitting diode (LED) current balancing topology using a current-fed hybrid quasi-Z-source converter. With the proposed structure, currents flowing through four LED strings are automatically balanced owing to the charge (amp-sec) balance condition on capacitors. Thus, automatic current balancing of the proposed driver is simple and precise. In addition, the proposed LED driver uses only one active switch and three diodes. The operating principle and characteristics of the proposed four-channel LED driver are analyzed in detail. To verify the operation of the proposed LED driver, a prototype is built and tested with different numbers of LEDs.

Keywords

Acknowledgement

본 연구는 산업통상자원부(MOTIE)와 한국에너지기술평가원(KETEP)의 지원을 받아 수행한 연구과제입니다. (No. 20194030202310)

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