| Title |
Design of LED Driving Circuit using Voltage Controlled Ring Oscillator and Lighting Controller |
| Authors |
Ki-Soo Kwon ; Young-Suk Suh |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2010.24.4.001 |
| Keywords |
LED ; LED Lighting ; Dimming Controller ; Lighting Controller |
| Abstract |
An LED driving and control circuit has been developed. The LED driver has a new PWM circuit for current control of LED columns with dimming, current and thermal control, and communication functions. The PWM circuit is composed of two ring oscillator and one counter which can be constructed using basic digital logic components. In addition, it has the functions of remote control mode such as ON, OFF, emergency and power saving modes by the serial communication. The PWM generator and control circuit have been designed and fabricated 0.35[㎛] Magnachip/Hynix digital IC fabrication process. The LED driving and control board using the developed chip is fabricated and tested successfully. |