Two-stage power conversion architecture for an LED driver circuit
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Perrault_Two-Stage.pdf
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965.64 KB
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Author(s)
Lim, Seungbum
Ranson, John
Otten, David M.
Perreault, David J.
Date Issued
March 2013
Journal
Proceedings of the 2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Lim, Seungbum, John Ranson, David M. Otten, and David J. Perreault. “Two-Stage Power Conversion Architecture for an LED Driver Circuit.” 2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC) (March 2013).
Version
Author's final manuscript
Abstract
This paper presents a merged-two-stage circuit topology suitable for efficient LED drivers operating from either wide-range dc input voltage or ac line voltage. This two-stage topology is based on a soft-charged switched-capacitor pre-regulator/transformation stage and a high-frequency magnetic regulator stage. Soft charging of the switched capacitor circuit, zero voltage switching of the high-frequency regulator circuit, and time-based indirect scale current control are used to maintain high efficiency, high power density, and high power factor. Two implementations of the proposed architecture are demonstrated: a wide input voltage range dc-dc converter and a line interfaced ac-dc converter. The dc-dc converter shows 85–95% efficiency at 20 W power across 25–200 V input voltage range, and the ac-dc converter achieves 88% efficiency with 0.93 power factor at 8.4 W average power.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Research Laboratory of Electronics
Massachusetts Institute of Technology. School of Engineering
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1109/APEC.2013.6520311
