Buck-type wide-range dimmable LED driver

Po Yen Lin, Tsorng Juu Liang, Che Wei Chang, Kai Hui Chen, Bin Kun Huang

研究成果: Conference contribution

2 引文 斯高帕斯(Scopus)

摘要

For many LED applications, the dimming control is required in saving the energy consumptions. However, the wide-range dimming cannot be achieved due to the minimum on-time and switching frequency at low dimming level. In this paper, a buck-type wide-range dimmable LED driver is designed and implemented. According to the different percentage of dimming, the buck converter can operate in QR mode, frequency limitation with the valley switching, frequency reduction mode, and burst mode with the primary-side control scheme. By changing the parameters of the PI controller, the LED current can still be estimated precisely in burst mode. Therefore, the ideally linear wide-range dimming can be achieved by the proposed primary-side control scheme. Finally, the buck-type LED driver with the universal input voltages 90-264 Vrms applied to 42 V/ 8 W LED lamps is implemented. The dimming range is from 100 % to 1 %. The line regulations at 100 % and 1 % dimming are both lower than 5 %. The power factor is higher than 0.96 and the total harmonic distortion is lower than 20 % in the universal input voltage range. The highest efficiency is 94.67%.

原文English
主出版物標題2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017
發行者Institute of Electrical and Electronics Engineers Inc.
頁面1563-1569
頁數7
ISBN(電子)9781509053667
DOIs
出版狀態Published - 2017 五月 17
事件32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017 - Tampa, United States
持續時間: 2017 三月 262017 三月 30

出版系列

名字Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

Other

Other32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017
國家/地區United States
城市Tampa
期間17-03-2617-03-30

All Science Journal Classification (ASJC) codes

  • 電氣與電子工程

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