LED Driver Achieves Electrolytic Capacitor-Less and Flicker-Free Operation with an Energy Buffer Unit

Peng Fang; Bo Sheng; Yan Fei Liu; Yan Zhang

doi:10.1109/ECCE.2018.8558053

LED Driver Achieves Electrolytic Capacitor-Less and Flicker-Free Operation with an Energy Buffer Unit

Peng Fang, Bo Sheng, Yan Fei Liu, Yan Zhang

Electrical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Scopus citations

Abstract

In this paper, a cycle-by-cycle energy buffering LED driver has been proposed to achieve electrolytic capacitor-less flicker-free operation. An energy buffering unit (EBU), with high voltage film capacitors being the energy storage device, is introduced in the design to buffer imbalanced energy in every switching cycle. The switching current can be controlled to meet high power factor correction and deliver DC LED output current at the same time. Compared to previous electrolytic capacitor-less designs, it can reduce circulating power and, therefore, also reduce power conversion loss. A 15W experimental prototype had been built and tested to verify the proposed LED driving method.

Original language	English (US)
Title of host publication	2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	5109-5116
Number of pages	8
ISBN (Electronic)	9781479973118
DOIs	https://doi.org/10.1109/ECCE.2018.8558053
State	Published - Dec 3 2018
Event	10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018 - Portland, United States Duration: Sep 23 2018 → Sep 27 2018

Publication series

Name	2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018

Other

Other	10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018
Country/Territory	United States
City	Portland
Period	9/23/18 → 9/27/18

Bibliographical note

Publisher Copyright:
© 2018 IEEE.

Publisher link

10.1109/ECCE.2018.8558053

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Fang, P., Sheng, B., Liu, Y. F., & Zhang, Y. (2018). LED Driver Achieves Electrolytic Capacitor-Less and Flicker-Free Operation with an Energy Buffer Unit. In 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018 (pp. 5109-5116). Article 8558053 (2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2018.8558053

LED Driver Achieves Electrolytic Capacitor-Less and Flicker-Free Operation with an Energy Buffer Unit. / Fang, Peng; Sheng, Bo; Liu, Yan Fei et al.
2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018. Institute of Electrical and Electronics Engineers Inc., 2018. p. 5109-5116 8558053 (2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Fang, P, Sheng, B, Liu, YF & Zhang, Y 2018, LED Driver Achieves Electrolytic Capacitor-Less and Flicker-Free Operation with an Energy Buffer Unit. in 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018., 8558053, 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018, Institute of Electrical and Electronics Engineers Inc., pp. 5109-5116, 10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018, Portland, United States, 9/23/18. https://doi.org/10.1109/ECCE.2018.8558053

Fang P, Sheng B, Liu YF, Zhang Y. LED Driver Achieves Electrolytic Capacitor-Less and Flicker-Free Operation with an Energy Buffer Unit. In 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018. Institute of Electrical and Electronics Engineers Inc. 2018. p. 5109-5116. 8558053. (2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018). doi: 10.1109/ECCE.2018.8558053

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abstract = "In this paper, a cycle-by-cycle energy buffering LED driver has been proposed to achieve electrolytic capacitor-less flicker-free operation. An energy buffering unit (EBU), with high voltage film capacitors being the energy storage device, is introduced in the design to buffer imbalanced energy in every switching cycle. The switching current can be controlled to meet high power factor correction and deliver DC LED output current at the same time. Compared to previous electrolytic capacitor-less designs, it can reduce circulating power and, therefore, also reduce power conversion loss. A 15W experimental prototype had been built and tested to verify the proposed LED driving method.",

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AB - In this paper, a cycle-by-cycle energy buffering LED driver has been proposed to achieve electrolytic capacitor-less flicker-free operation. An energy buffering unit (EBU), with high voltage film capacitors being the energy storage device, is introduced in the design to buffer imbalanced energy in every switching cycle. The switching current can be controlled to meet high power factor correction and deliver DC LED output current at the same time. Compared to previous electrolytic capacitor-less designs, it can reduce circulating power and, therefore, also reduce power conversion loss. A 15W experimental prototype had been built and tested to verify the proposed LED driving method.

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LED Driver Achieves Electrolytic Capacitor-Less and Flicker-Free Operation with an Energy Buffer Unit

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