A novel line frequency multistage conduction LED driver with high power factor

Tsorng Juu Liang; Wei Jing Tseng; Jiann Fuh Chen; Jyun Peng Wu

doi:10.1109/TPEL.2014.2363293

A novel line frequency multistage conduction LED driver with high power factor

Tsorng Juu Liang, Wei Jing Tseng, Jiann Fuh Chen, Jyun Peng Wu

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

This paper proposes a novel line frequency multistage conduction LED driver with current-limiting mechanism. By operating the LED driver in multistage conduction, the number of LEDs can be automatically adjusted to be driven with low ac voltage, which increases the LED utilization rate. The current-limiting mechanism offers overcurrent protection to the LEDs. With the aim of shaping the input current into a sinusoidal waveform, the number of LEDs and the current-limit values are determined by the proposed analysis methods; these steps improve the power factor (PF) and the total harmonic distortion of input current (THDi). Finally, two prototype circuits - two-stage conduction and three-stage conduction LED drivers - are built to verify the performances, such as LED utilization rate, THDi, PF, and system efficiency.

Original language	English
Article number	6936356
Pages (from-to)	5103-5115
Number of pages	13
Journal	IEEE Transactions on Power Electronics
Volume	30
Issue number	9
DOIs	https://doi.org/10.1109/TPEL.2014.2363293
Publication status	Published - 2015 Sept 1

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering

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10.1109/TPEL.2014.2363293

Cite this

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title = "A novel line frequency multistage conduction LED driver with high power factor",

abstract = "This paper proposes a novel line frequency multistage conduction LED driver with current-limiting mechanism. By operating the LED driver in multistage conduction, the number of LEDs can be automatically adjusted to be driven with low ac voltage, which increases the LED utilization rate. The current-limiting mechanism offers overcurrent protection to the LEDs. With the aim of shaping the input current into a sinusoidal waveform, the number of LEDs and the current-limit values are determined by the proposed analysis methods; these steps improve the power factor (PF) and the total harmonic distortion of input current (THDi). Finally, two prototype circuits - two-stage conduction and three-stage conduction LED drivers - are built to verify the performances, such as LED utilization rate, THDi, PF, and system efficiency.",

author = "Liang, {Tsorng Juu} and Tseng, {Wei Jing} and Chen, {Jiann Fuh} and Wu, {Jyun Peng}",

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AU - Liang, Tsorng Juu

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AB - This paper proposes a novel line frequency multistage conduction LED driver with current-limiting mechanism. By operating the LED driver in multistage conduction, the number of LEDs can be automatically adjusted to be driven with low ac voltage, which increases the LED utilization rate. The current-limiting mechanism offers overcurrent protection to the LEDs. With the aim of shaping the input current into a sinusoidal waveform, the number of LEDs and the current-limit values are determined by the proposed analysis methods; these steps improve the power factor (PF) and the total harmonic distortion of input current (THDi). Finally, two prototype circuits - two-stage conduction and three-stage conduction LED drivers - are built to verify the performances, such as LED utilization rate, THDi, PF, and system efficiency.

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A novel line frequency multistage conduction LED driver with high power factor

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