Active LED driver of high PF and low THD compatible with rapid-start ballast

A new active LED driver with high power factor (PF) and low total harmonic distortion (THD) compatible with a conventional rapid-start ballast is proposed. A dedicated LC compensation circuit is attached to the ballast to increase the PF and lower the THD of the source current. A boost converter is...

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Bibliographic Details
Published inProceedings of The 7th International Power Electronics and Motion Control Conference Vol. 1; pp. 203 - 209
Main Authors Inyong Yeo, Bohwan Choi, Rim, Chun-taek, Changbyung Park
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2012
Subjects
active LED driver
Capacitors
high power factor
Light emitting diodes
Logic gates
low total harmonic distortion
rapid-start ballast
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Summary:A new active LED driver with high power factor (PF) and low total harmonic distortion (THD) compatible with a conventional rapid-start ballast is proposed. A dedicated LC compensation circuit is attached to the ballast to increase the PF and lower the THD of the source current. A boost converter is used for regulating the LED current, however its duty cycle is bounded to avoid the unstable operating region, which is analyzed and characterized in this paper. A small DC input capacitor is used to prevent the ballast from an excessive transient voltage and current. The design of the active LED driver for the highly non-linear ballast is verified by extensive experiments.
ISBN:9781457720857
145772085X
DOI:10.1109/IPEMC.2012.6258903