Analysis and Design Considerations for a High Power Buck Derived LED Driver with Extended Output Voltage and Low Total Harmonic Distortion

Haijun Lv; Xinke Wu; Junming Zhang

Analysis and Design Considerations for a High Power Buck Derived LED Driver with Extended Output Voltage and Low Total Harmonic Distortion

Haijun Lv

Xinke Wu

Junming Zhang

Vol. 17, No. 5, pp. 1137-1149, Sep. 2017

10.6113/JPE.2019.17.5.1137

PDF

Abstract

In order to reduce the cost, improve the efficiency and simplify the complicated control of existing isolated LED drivers, an improved boundary conduction mode (BCM) Buck ac-dc light emitting diode (LED) driver with extended output voltage and low total harmonic distortion is proposed. With a coupled inductor winding and a stacked output, its output voltage can be elevated to a much higher value when compared to that of the conventional Buck ac-dc converter, without sacrificing the input harmonics and power factor. Therefore, the proposed Buck LED driver can meet the IEC61000-3-2 (Class C) limitation and has a low THD. The operating principle of the topology and the design methodology of the ac-dc LED driver are presented. A 150 W ac-dc prototype was built in the laboratory and it shows that the input current harmonics meet the lighting standard. In addition, the THD is less than 16% at a typical ac input. The peak efficiency is higher than 96.5% at a full load and a normal input.

Statistics

Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.

Cite this article

[IEEE Style]

H. Lv, X. Wu, J. Zhang, "Analysis and Design Considerations for a High Power Buck Derived LED Driver with Extended Output Voltage and Low Total Harmonic Distortion," Journal of Power Electronics, vol. 17, no. 5, pp. 1137-1149, 2017. DOI: 10.6113/JPE.2019.17.5.1137.

[ACM Style]

Haijun Lv, Xinke Wu, and Junming Zhang. 2017. Analysis and Design Considerations for a High Power Buck Derived LED Driver with Extended Output Voltage and Low Total Harmonic Distortion. Journal of Power Electronics, 17, 5, (2017), 1137-1149. DOI: 10.6113/JPE.2019.17.5.1137.