Buck–Boost–Buck-Type Single-Switch Multistring Resonant LED Driver With High Power Factor and Passive Current Balancing

Xueshan Liu; Yuyang Wan; Zheng Dong; Mingzhi He; Qun Zhou; Chi K. Tse

doi:10.1109/TPEL.2019.2942488

Buck–Boost–Buck-Type Single-Switch Multistring Resonant LED Driver With High Power Factor and Passive Current Balancing

Xueshan Liu
, Yuyang Wan
, Zheng Dong
, Mingzhi He^*
, Qun Zhou
, Chi K. Tse

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

34 Citations (Scopus)

Abstract

An integrated buck-boost-buck-type single-switch multistring resonant light-emitting diode (LED) driver is proposed and analyzed. It combines buck-boost and buck converters to achieve passive current balancing and power factor correction. With this circuit configuration, the proposed LED driver employs only one low-side connection active switch, resulting in a very simple control requirement involving one closed-loop controller for regulating one output current. Other output currents can be balanced automatically by resonant capacitor and storage capacitors, making the control strategy economical. In addition, high efficiency is achieved due to single-stage power conversion. Taking three-string LED driver as an example, the proposed buck-boost-buck-type single-switch LED driver is studied in terms of operating principle, current balancing principle, power factor (PF) analysis, voltage gain, and key circuit parameter design. Finally, an 84-W high-PF three-string LED driver prototype with 94.3% peak efficiency is built to verify the analytical results.

Original language	English
Article number	8845669
Pages (from-to)	5132-5143
Journal	IEEE Transactions on Power Electronics
Volume	35
Issue number	5
Online published	19 Sept 2019
DOIs	https://doi.org/10.1109/TPEL.2019.2942488
Publication status	Published - May 2020
Externally published	Yes

Funding

Manuscript received May 8, 2019; revised July 17, 2019; accepted September 3, 2019. Date of publication September 19, 2019; date of current version February 11, 2020. This work was supported by the Fundamental Research Funds for Central Universities under Project YJ201909. Recommended for publication by Associate Editor L. Huber. (Corresponding author: Mingzhi He.) X. Liu, Y. Wan, M. He, and Q. Zhou are with the College of Electrical Engineering, Sichuan University, Chengdu 610065, China (e-mail: xueshan5851 @163.com; [email protected]; [email protected]; zhouqunsc@163 .com).

Research Keywords

Buck-boost-buck
light-emitting diode (LED) driver
multistring
passive current balancing
power factor correction (PFC)
single switch

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@article{103ac528185a48fba6233989ef24a0f5,

title = "Buck–Boost–Buck-Type Single-Switch Multistring Resonant LED Driver With High Power Factor and Passive Current Balancing",

abstract = "An integrated buck-boost-buck-type single-switch multistring resonant light-emitting diode (LED) driver is proposed and analyzed. It combines buck-boost and buck converters to achieve passive current balancing and power factor correction. With this circuit configuration, the proposed LED driver employs only one low-side connection active switch, resulting in a very simple control requirement involving one closed-loop controller for regulating one output current. Other output currents can be balanced automatically by resonant capacitor and storage capacitors, making the control strategy economical. In addition, high efficiency is achieved due to single-stage power conversion. Taking three-string LED driver as an example, the proposed buck-boost-buck-type single-switch LED driver is studied in terms of operating principle, current balancing principle, power factor (PF) analysis, voltage gain, and key circuit parameter design. Finally, an 84-W high-PF three-string LED driver prototype with 94.3\% peak efficiency is built to verify the analytical results.",

keywords = "Buck-boost-buck, light-emitting diode (LED) driver, multistring, passive current balancing, power factor correction (PFC), single switch",

author = "Xueshan Liu and Yuyang Wan and Zheng Dong and Mingzhi He and Qun Zhou and Tse, \{Chi K.\}",

year = "2020",

month = may,

doi = "10.1109/TPEL.2019.2942488",

language = "English",

volume = "35",

pages = "5132--5143",

journal = "IEEE Transactions on Power Electronics",

issn = "0885-8993",

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Buck–Boost–Buck-Type Single-Switch Multistring Resonant LED Driver With High Power Factor and Passive Current Balancing. / Liu, Xueshan; Wan, Yuyang; Dong, Zheng et al.
In: IEEE Transactions on Power Electronics, Vol. 35, No. 5, 8845669, 05.2020, p. 5132-5143.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Buck–Boost–Buck-Type Single-Switch Multistring Resonant LED Driver With High Power Factor and Passive Current Balancing

AU - Liu, Xueshan

AU - Wan, Yuyang

AU - Dong, Zheng

AU - He, Mingzhi

AU - Zhou, Qun

AU - Tse, Chi K.

PY - 2020/5

Y1 - 2020/5

N2 - An integrated buck-boost-buck-type single-switch multistring resonant light-emitting diode (LED) driver is proposed and analyzed. It combines buck-boost and buck converters to achieve passive current balancing and power factor correction. With this circuit configuration, the proposed LED driver employs only one low-side connection active switch, resulting in a very simple control requirement involving one closed-loop controller for regulating one output current. Other output currents can be balanced automatically by resonant capacitor and storage capacitors, making the control strategy economical. In addition, high efficiency is achieved due to single-stage power conversion. Taking three-string LED driver as an example, the proposed buck-boost-buck-type single-switch LED driver is studied in terms of operating principle, current balancing principle, power factor (PF) analysis, voltage gain, and key circuit parameter design. Finally, an 84-W high-PF three-string LED driver prototype with 94.3% peak efficiency is built to verify the analytical results.

AB - An integrated buck-boost-buck-type single-switch multistring resonant light-emitting diode (LED) driver is proposed and analyzed. It combines buck-boost and buck converters to achieve passive current balancing and power factor correction. With this circuit configuration, the proposed LED driver employs only one low-side connection active switch, resulting in a very simple control requirement involving one closed-loop controller for regulating one output current. Other output currents can be balanced automatically by resonant capacitor and storage capacitors, making the control strategy economical. In addition, high efficiency is achieved due to single-stage power conversion. Taking three-string LED driver as an example, the proposed buck-boost-buck-type single-switch LED driver is studied in terms of operating principle, current balancing principle, power factor (PF) analysis, voltage gain, and key circuit parameter design. Finally, an 84-W high-PF three-string LED driver prototype with 94.3% peak efficiency is built to verify the analytical results.

KW - Buck-boost-buck

KW - light-emitting diode (LED) driver

KW - multistring

KW - passive current balancing

KW - power factor correction (PFC)

KW - single switch

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DO - 10.1109/TPEL.2019.2942488

M3 - RGC 21 - Publication in refereed journal

SN - 0885-8993

VL - 35

SP - 5132

EP - 5143

JO - IEEE Transactions on Power Electronics

JF - IEEE Transactions on Power Electronics

IS - 5

M1 - 8845669

ER -

Buck–Boost–Buck-Type Single-Switch Multistring Resonant LED Driver With High Power Factor and Passive Current Balancing

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