Cost-Effective Single Switch Multi-Channel LED Driver


Vol. 15, No. 2, pp. 319-326, Mar. 2015
10.6113/JPE.2015.15.2.319


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 Abstract

In this paper, a cost-effective single switch multi-channel LED (light emitting diode) driver is proposed. While conventionalLED drivers require as many non-isolated DC/DC converters as the number of LED channels, the proposed LED driver needsonly one power switch and several balancing capacitors instead of expensive non-isolated DC/DC converters. Therefore, theproposed driver features a simpler structure, with a lower cost and a higher efficiency. Because its power switch can be turned offunder the zero current switching condition, it has very desirable advantages such as improved electromagnetic interferencecharacteristics and high efficiency. Moreover, it uses only a small number of DC blocking capacitors with no additional activedevices for the current balancing of multi-channel LEDs. As a result, the proposed driver exhibits high reliability and is costeffective. To confirm the validity of the proposed driver, a theoretical analysis is performed, and design considerations andexperimental results obtained from a prototype that is applicable to a 46” LED-TV are presented.


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Cite this article

[IEEE Style]

S. Hwang, W. Hwang, S. Han, "Cost-Effective Single Switch Multi-Channel LED Driver," Journal of Power Electronics, vol. 15, no. 2, pp. 319-326, 2015. DOI: 10.6113/JPE.2015.15.2.319.

[ACM Style]

Sang-Soo Hwang, Won-Sun Hwang, and Sang-Kyoo Han. 2015. Cost-Effective Single Switch Multi-Channel LED Driver. Journal of Power Electronics, 15, 2, (2015), 319-326. DOI: 10.6113/JPE.2015.15.2.319.