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

Inyong Yeo Inyong Yeo,Bohwan Choi Bohwan Choi,Chun-Taek Rim,Changbyung Park Changbyung Park

doi:10.1109/ipemc.2012.6258903

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

Inyong Yeo Inyong Yeo, Bohwan Choi Bohwan Choi + Show 2 more

https://doi.org/10.1109/ipemc.2012.6258903

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Publication Date: Jun 1, 2012

Affiliation: Korea Advanced Institute of Science and Technology

#Total Harmonic Distortion #High Total Harmonic Distortion + Show 8 more

Abstract
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Abstract

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.

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