| Title |
LED Driving Circuit using Charge Pump for Voltage Distribution |
| Authors |
Jang-Hee Yun ; Sungho Yoo ; Jeong-duk Ryeom |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2012.26.8.001 |
| Keywords |
LED ; Driving Circuit ; Voltage Division ; Efficiency ; Dimming |
| Abstract |
In this paper, a new LED driving circuit which is able to control dimming of LED is proposed using charge pump. The proposed LED driving circuit steps down the input voltage to operate LED without DC-DC converter. The operation of this driving circuit is verified by P-Spice simulation, and the characteristics of the driving circuit is measured and evaluated in the experiments. As a result, the driving circuit efficiency of 88.5[%] is obtained when all LEDs are turned on by digital control method at the highest dimming level(255/255). |