Cost-Effective Single Switch Multi-Channel LED Driver

Sang-Soo Hwang; Won-Sun Hwang; Sang-Kyoo Han

Cost-Effective Single Switch Multi-Channel LED Driver

Sang-Soo Hwang

Won-Sun Hwang

Sang-Kyoo Han

Vol. 15, No. 2, pp. 319-326, Mar. 2015

10.6113/JPE.2015.15.2.319

Current balancing

Multi-channel LED driver

PDF

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.

Statistics

Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.

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.