Multi-Output LED Driver Integrated with 3-Switch Converter and Passive Current Balance for Portable Applications

Sen Song; Kai Ni; Guipeng Chen; Yihua Hu; Dongsheng Yu

Multi-Output LED Driver Integrated with 3-Switch Converter and Passive Current Balance for Portable Applications

Vol. 19, No. 1, pp. 58-67, Jan. 2019

10.6113/JPE.2019.19.1.58

Multiple outputs

Passive current balance

Reduced switches

Zero-voltage-switching (ZVS)

PDF Full-Text

Abstract

This study presents a new portable eight-output light emitting diode (LED) driver. The eight output-channels are divided into two equal groups, and their output powers can be controlled individually by three active switches. In addition, a simple capacitor-based passive current balancing circuit (CBC) is employed in each port to guarantee that the currents of the four LEDs are the same. When compared with the conventionally used separate two-output isolated converters, the proposed one uses one less active switch. Moreover, zero-voltage-switching (ZVS) is achieved, which improves the power efficiency of the driver. Finally, a highly compact prototype is built, which can reach an efficiency of 94.6%.

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. Song, K. Ni, G. Chen, Y. Hu, D. Yu, "Multi-Output LED Driver Integrated with 3-Switch Converter and Passive Current Balance for Portable Applications," Journal of Power Electronics, vol. 19, no. 1, pp. 58-67, 2019. DOI: 10.6113/JPE.2019.19.1.58.

[ACM Style]

Sen Song, Kai Ni, Guipeng Chen, Yihua Hu, and Dongsheng Yu. 2019. Multi-Output LED Driver Integrated with 3-Switch Converter and Passive Current Balance for Portable Applications. Journal of Power Electronics, 19, 1, (2019), 58-67. DOI: 10.6113/JPE.2019.19.1.58.