A Current Balancing Scheme with High Luminous Efficiency for High Power LED Lighting

Xiaohui Qu; Siu-Chung Wong; Chi K. Tse

doi:10.1109/IECON.2013.6699130

A Current Balancing Scheme with High Luminous Efficiency for High Power LED Lighting

Xiaohui Qu^*
, Siu-Chung Wong
, Chi K. Tse

^*Corresponding author for this work

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

5 Citations (Scopus)

Abstract

The current imbalance in driving LED strings will cause fast degradation or even failure in some LEDs that should be avoided in LED applications. This paper presents a current balancing method based on the pulse-width modulation of a common bus voltage to each LED string to achieve the intended averaged current. For the balance of a common averaged current, a small duty cycle will necessitate a large LED turn-on current amplitude, which may cause temporal overheat and low luminous efficacy of LEDs. An optimal feedback control scheme is proposed to maximize the duty cycles and minimize the bus voltage. As a result, at lease one of the LED string is operating at a unity duty cycle. The analysis, implementation and verification are detailed in this paper. © 2013 IEEE.

Original language	English
Title of host publication	Proceedings, IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society
Pages	169-174
DOIs	https://doi.org/10.1109/IECON.2013.6699130
Publication status	Published - Nov 2013
Externally published	Yes
Event	39th Annual Conference of the IEEE Industrial Electronics Society (IECON 2013) - Austria Center Vienna, Vienna, Austria Duration: 10 Nov 2013 → 14 Nov 2013 https://ieeexplore.ieee.org/xpl/conhome/6683943/proceeding

Publication series

Name	IECON Proceedings (Industrial Electronics Conference)
ISSN (Print)	1553-572X

Conference

Conference	39th Annual Conference of the IEEE Industrial Electronics Society (IECON 2013)
Place	Austria
City	Vienna
Period	10/11/13 → 14/11/13
Internet address	https://ieeexplore.ieee.org/xpl/conhome/6683943/proceeding

Research Keywords

current balancing
dimming
high power LEDs
luminous efficacy

Access Output

10.1109/IECON.2013.6699130

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

@inproceedings{a0501110265e47949452b9d6543b2022,

title = "A Current Balancing Scheme with High Luminous Efficiency for High Power LED Lighting",

abstract = "The current imbalance in driving LED strings will cause fast degradation or even failure in some LEDs that should be avoided in LED applications. This paper presents a current balancing method based on the pulse-width modulation of a common bus voltage to each LED string to achieve the intended averaged current. For the balance of a common averaged current, a small duty cycle will necessitate a large LED turn-on current amplitude, which may cause temporal overheat and low luminous efficacy of LEDs. An optimal feedback control scheme is proposed to maximize the duty cycles and minimize the bus voltage. As a result, at lease one of the LED string is operating at a unity duty cycle. The analysis, implementation and verification are detailed in this paper. {\textcopyright} 2013 IEEE.",

keywords = "current balancing, dimming, high power LEDs, luminous efficacy",

author = "Xiaohui Qu and Siu-Chung Wong and Tse, \{Chi K.\}",

year = "2013",

month = nov,

doi = "10.1109/IECON.2013.6699130",

language = "English",

isbn = "9781479902248",

series = "IECON Proceedings (Industrial Electronics Conference)",

pages = "169--174",

booktitle = "Proceedings, IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society",

note = "39th Annual Conference of the IEEE Industrial Electronics Society (IECON 2013) ; Conference date: 10-11-2013 Through 14-11-2013",

url = "https://ieeexplore.ieee.org/xpl/conhome/6683943/proceeding",

}

Qu, X, Wong, S-C & Tse, CK 2013, A Current Balancing Scheme with High Luminous Efficiency for High Power LED Lighting. in Proceedings, IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society., 6699130, IECON Proceedings (Industrial Electronics Conference), pp. 169-174, 39th Annual Conference of the IEEE Industrial Electronics Society (IECON 2013), Vienna, Austria, 10/11/13. https://doi.org/10.1109/IECON.2013.6699130

A Current Balancing Scheme with High Luminous Efficiency for High Power LED Lighting. / Qu, Xiaohui; Wong, Siu-Chung; Tse, Chi K.
Proceedings, IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society. 2013. p. 169-174 6699130 (IECON Proceedings (Industrial Electronics Conference)).

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

TY - GEN

T1 - A Current Balancing Scheme with High Luminous Efficiency for High Power LED Lighting

AU - Qu, Xiaohui

AU - Wong, Siu-Chung

AU - Tse, Chi K.

PY - 2013/11

Y1 - 2013/11

N2 - The current imbalance in driving LED strings will cause fast degradation or even failure in some LEDs that should be avoided in LED applications. This paper presents a current balancing method based on the pulse-width modulation of a common bus voltage to each LED string to achieve the intended averaged current. For the balance of a common averaged current, a small duty cycle will necessitate a large LED turn-on current amplitude, which may cause temporal overheat and low luminous efficacy of LEDs. An optimal feedback control scheme is proposed to maximize the duty cycles and minimize the bus voltage. As a result, at lease one of the LED string is operating at a unity duty cycle. The analysis, implementation and verification are detailed in this paper. © 2013 IEEE.

AB - The current imbalance in driving LED strings will cause fast degradation or even failure in some LEDs that should be avoided in LED applications. This paper presents a current balancing method based on the pulse-width modulation of a common bus voltage to each LED string to achieve the intended averaged current. For the balance of a common averaged current, a small duty cycle will necessitate a large LED turn-on current amplitude, which may cause temporal overheat and low luminous efficacy of LEDs. An optimal feedback control scheme is proposed to maximize the duty cycles and minimize the bus voltage. As a result, at lease one of the LED string is operating at a unity duty cycle. The analysis, implementation and verification are detailed in this paper. © 2013 IEEE.

KW - current balancing

KW - dimming

KW - high power LEDs

KW - luminous efficacy

UR - https://www.scopus.com/pages/publications/84893624330

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84893624330&origin=recordpage

U2 - 10.1109/IECON.2013.6699130

DO - 10.1109/IECON.2013.6699130

M3 - RGC 32 - Refereed conference paper (with host publication)

SN - 9781479902248

T3 - IECON Proceedings (Industrial Electronics Conference)

SP - 169

EP - 174

BT - Proceedings, IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society

T2 - 39th Annual Conference of the IEEE Industrial Electronics Society (IECON 2013)

Y2 - 10 November 2013 through 14 November 2013

ER -

A Current Balancing Scheme with High Luminous Efficiency for High Power LED Lighting

Abstract

Publication series

Conference

Research Keywords

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Cite this