Paper Info
Title
Design and Implementation of a Single-Stage High-Efficacy LED Driver with Dynamic Voltage Regulation
Abstract
This paper proposes a single-stage high-efficacy fly back power-factor-correction (PFC) converter with optimization efficiency control for driving multi-string light-emitting diodes (LEDs). The LED driver consists of a fly back converter with PFC mechanism and a constant-current drive circuit with functionalities of efficiency optimization and dimming control. The proposed single-stage LED driver topology features benefits of high power factor and low total harmonic distortion (THD) in low-cost outlay. The pulse width modulation (PWM) dimming mechanism cooperating with the constant-current control circuit completes the LED dimming control. In order to reduce the power dissipations of the dimming circuits, a dynamic voltage regulation (DVR) control is presented to regulate the LED supply voltage by means of the sensing of the drain voltage of the MOSFET in the current controller. While maintaining the desired LED brightness, the DVR technique can minimize the voltage drop of the dimming circuit to enhance the LED driver efficiency further. A 30W white LED driver is devised and a corresponding driver prototype is realized. Testing results are shown experimentally to verify the effectiveness and performance improved of the proposed scheme.
Year
DOI
Venue
2013
10.1109/SMC.2013.248
SMC
Keywords
DocType
ISSN
led supply voltage,LED driver efficiency,optimisation,led brightness,proposed single-stage led driver,flyback converter,single-stage high-efficacy LED driver,harmonic distortion,dynamic voltage regulation (DVR),corresponding driver prototype,PFC mechanism,driver circuits,THD,constant-current drive circuit,single-stage LED driver topology,low-cost outlay,PWM dimming mechanism,led driver efficiency,power 30 W,single-stage high-efficacy fly back power-factor-correction converter,white led driver,optimization efficiency control,single-stage high-efficacy led driver,power factor,dynamic voltage regulation,dimming circuits,PFC converter,electric current control,LED dimming control,high power factor,drain voltage,PWM power convertors,power factor correction,power dissipations,LED brightness,white LED driver,led driver,light emitting diode (LED),multistring light-emitting diodes,power factor correction (PFC),light emitting diodes,current controller,MOSFET,voltage drop minimization,constant-current control circuit,pulse width modulation dimming mechanism,LED supply voltage,voltage control,DVR control,driver prototype,total harmonic distortion,DVR technique
Conference
1062-922X
Citations 
PageRank 
References 
2
0.54
3
Authors
6
Name
Order
Citations
PageRank
Shun-Yuan Wang194.86
Chwan-Lu Tseng212124.47
Shou-Chuang Lin320.54
Shun-Chung Wang4264.51
Ching-Lin Chen520.54
Jen-Hsiang Chou664.40