电容钳位型LED均流电路

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (977 KB) HTML (0 KB)
Export: BibTeX | EndNote (RIS)

Abstract This paper proposes a simple capacitor clamped current sharing circuit for multi-string LEDs to solve the current imbalance problem caused by voltage drop tolerance and the negative temperature coefficient of LED, which employs staggered turn-on switchs and multi-capacitor charge conservation. The operating principle and parameter design of the topology are analyzed in detail. On this basis, three-string current sharing topology validated by experiments and relative experimental waveforms are presented, which show that the proposed circuit has good effect on current sharing while the effect isn’t affected by the output voltage of each branch, but also has the advantages of low voltage stress, non-magnetic components, ease of integration and simple control.

Key words： High brightness light-emitting diode(LED) current sharing capacitor clamped charging and discharging lighting

Received: 05 May 2011 Published: 28 November 2013

PACS:

TN27

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Yu Yijie
	Zhang Fanghua
	Ni Jianjun

Cite this article:

Yu Yijie,Zhang Fanghua,Ni Jianjun. Capacitor Clamped Current Sharing Circuit for Multi-String LEDs[J]. Transactions of China Electrotechnical Society, 2013, 28(2): 178-184.

URL:

http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I2/178

[1] Ann anbor’s LED street light program_ICLEI climate innovation invitation[R]. [2008-06-15].http://www.ledcity.org/lib/resources/Ann%20Arbor%20LED%20 Summary.
[2] Robert L, Henderson. LED streetlight Test project in Raleigh[R]. [2009-04-13]. http: //progress-energy. com/ustservice/shared /LED Street Light Test Project Report. pdf.
[3] LEDs: coming soon to a street light near you[EB/OL]. [2008-09-08]. http://www.philipslumileds.com/support/ documentation/white-papers.
[4] Cree Corporation. Datasheets of cree’s LED chips [EB/OL]. [2010-03-05]. http://www.cree.com/products/ led_docs.asp.
[5] Osram Corporation. Datasheets of osram’s LED semiconductors[EB/OL]. [2010-03-05]. http://www.osram.com/osram_com/Professionals/Opto_Semicon-ductors_ %26_LED/Everything_about_LED85033/index.html.
[6] Aoyama Y, Yachi T. A LED module array system esigned for streetlight use[C]. Energy 2030 Conference, Atlanta, Georgia, USA, 2008.
[7] 葛良安, 华桂潮, 姚晓莉, 等. 一种适用于LED驱动器的多路恒流控制电路: 中国, 200920198105.7[P]. 2010-08-11.
[8] Hu Y, Jovanovic M M. LED driver with self-adaptive drive voltage[J]. IEEE Transactions on Power Electronics, 2008, 23(6): 3116-31258.
[9] Chiu H J, Lo Y K, Chen J T, et al. A high-efficiency dimmable LED driver for low-power lighting applications[J]. IEEE Transactions on Industrial Electronics, 2010, 57(2): 735-743.
[10] Doshi M, Zane R. Control of solid-state lamps using a multiphase pulsewidth modulation technique[J]. IEEE Transactions on Power Electronics, 2010, 25(7): 1894-1904.
[11] 葛良安, 华桂潮, 姚晓莉. 一种适用于LED驱动器的多路PWM斩波均流电路: 中国,200920269246. 3[P]. 2010-08-18.
[12] Chen C C, Wu C Y, Wu T F. Fast transition current-type burstmode dimming control for the LED backlight driving system of LCD TV[C]. Power Electronics Specialists Conference, Jeju, South Korea, 2006.
[13] Jacobs J, Shen J, Hente D. A simple digital current controller for solid-state lighting[C]. Power Electronics Specialists Conference, Rodes, Greece, 2008.
[14] Hu Q, Zane R. LED driver circuit with series-input connected converter cells operating in continuous conduction mode[J]. IEEE Transactions on Power Electronics, 2010, 25(3): 574-582.
[15] Hwu K I, Yau Y T. Applying one-comparator counter-based sampling to current sharing control of multi-channel LED strings[C]. Applied Power Electronics Conference and Exposition, Palm Springs, California, 2010.
[16] Shu Ji, Haoran Wu, Xiaoyong Ren et al. Multi- channel constant current (MC3) LED driver[C]. Applied Power Electronics Conference and Exposition, Fort Worth, Texas, 2011.
[17] 葛良安, 姚晓莉, 华桂潮, 等. 一种适用于多路LED恒流驱动的电路: 中国,2009202733 52. 9[P]. 2010-09-15.
[18] 范剑平. 高效率LED驱动控制方法: 中国, 200810042555. 7[P]. 2010-3-10.
[19] 张军明, 汪剑峰, 吴新科, 等. 电流自平衡的多路输出谐振变流器: 中国, 201010287918.0[P]. 2011-01-19.
[20] Yuequan Hu, Milan M Jovanović. A new current- balancing method for paralleled LED strings[C]. Applied Power Electronics Conference and Exposition, Fort Worth, Texas, 2011.
[21] Choi S, Agarwal P, Kim T, et al. Symmetric current balancing circuit for multiple DC loads[C]. Applied Power Electronics Conference and Exposition, Palm Springs, California 2010.
[22] 杨恒. LED照明驱动器设计步骤详解[M]. 北京: 中国电力出版社, 2009.