Title :
A multi-channel LED driver with accurate current control and adjustable LED numbers
Author :
Chia, Chu-Hsiang ; Lei, Pui-Sun ; Chang, Robert Chen-Hao ; Ko, Pei-Wei
Author_Institution :
Dept. of Electr. Eng., Nat. Chung Hsing Univ., Taichung, Taiwan
Abstract :
This paper presents a multi-channel LED driver with PFM control which channels are independent of the LED numbers. Every channel can have almost the same driving current under different LED numbers. The current error is only 0.054% that is better than the previous design. It is designed by using TSMC 0.35μm 3.3V/5V CMOS technology. The proposed driver with the novel current balance circuit can have 15.6V output voltage and the maximum loading is 150mA.
Keywords :
CMOS integrated circuits; DC-DC power convertors; driver circuits; light emitting diodes; PFM DC-DC converter; PFM control; TSMC CMOS technology; current 150 mA; current balance circuit; current control; multichannel LED driver; size 0.35 mum; voltage 15.6 V; voltage 3.3 V; voltage 5 V; Accuracy; Conferences; Light emitting diodes; Lighting; Resistors; Simulation; Voltage control;
Conference_Titel :
Devices, Circuits and Systems (ICCDCS), 2012 8th International Caribbean Conference on
Conference_Location :
Playa del Carmen
Print_ISBN :
978-1-4577-1116-9
Electronic_ISBN :
978-1-4577-1115-2
DOI :
10.1109/ICCDCS.2012.6188918
