Design and Implementation of 150 W AC/DC LED Driver with Unity Power Factor, Low THD, and Dimming Capability

Ngo Thanh Tung,Le Minh Phuong,Nguyen Dinh Tuyen,Ngo Cao Cuong,Nguyen Hoai Phong,Nguyen Minh Huy

doi:10.3390/electronics9010052

Abstract

This paper presents the implementation of a two-stage light-emitting diode (LED) driver based on commercial integrated circuits (IC). The presented LED driver circuit topology, which is designed to drive a 150 W LED module, consists of two stages: AC-DC power factor correction (PFC) stage and DC/DC power converter stage. The implementation of the PFC stage uses IC NCP1608, which uses the critical conduction mode to guarantee a unity input power factor with a wide range of input voltages. The DC/DC power converter with soft-switching characteristics for the entire load range uses IC FLS2100XS. Furthermore, the design of an electromagnetic interference (EMI) filter for the LED driver and the dimming control circuit are discussed in detail. The hardware prototype, an LED lighting system, with a rated power of 150 W/32 V from a nominal 220 V/50 Hz AC voltage supply was tested to show the effectiveness of the design. The presented LED driver was tested for street lighting, and the experimental results show that the power factor (PF) was higher than 0.97, the total harmonics distortion (THD) was lower than 7%, and the efficiency was 91.7% at full load. The results prove that the performance of the presented LED driver complies with the standards: IEC61000-3-2 and CIRSP 15:2009.

Highlights

As compared to conventional lighting solutions, the most important advantage of light-emitting diode (LED) is their long lifespan
220 Vrms, the power factor (PF) is higher than 0.98, the total harmonics distortion (THD) is lower than 7%, and the efficiency is higher than 91.6%
This converter is suitable for a wide range of input voltages, and it achieved a good performance for the THD and PF, as well as efficiency

Summary

Introduction

As compared to conventional lighting solutions, the most important advantage of LEDs is their long lifespan. Medium- and high-power LEDs have been used to replace traditional high-pressure sodium (HPS) lamps for street lighting applications. The use of LEDs for street lighting applications is a good solution to save electric energy, and the LED driver has become an attractive topic for much research [4]. There have been some issues that researchers have concentrated on, to develop LED drivers for street lighting applications to improve input performance [5,6,7], reduce the size [8], and improve the system efficiency [9]

Methods

Results

Conclusion