Title :
A high-performance LED array driver ASIC with programmable thermal coefficients
Author :
Chung, Jeremy K. ; Kieffer, Kenneth D. ; Pham, Hieu
Author_Institution :
Eastman Kodak Co., Rochester, NY, USA
Abstract :
The authors describe the design of an LED driver ASIC for use in a high-performance printing system using advanced CMOS technology. This ASIC provides digitally controllable constant-current sources capable of delivering up to 6 mA to each channel of an array of 96 LEDs with an effective 16-bit resolution. It features automatic in-situ temperatures compensation with field programmable temperature coefficients that can be digitally varied from 0.3% to 2% per degree Kelvin. These current sources possess excellent current regulation in response to wide LED loading conditions, and are insensitive to power supply fluctuations. Fabricated using an advanced 1.5 μm CMOS n-well, double-metal, single-poly process, it measures approximately 7.6 mm by 3.8 mm
Keywords :
CMOS integrated circuits; application specific integrated circuits; constant current sources; driver circuits; electroluminescent displays; light emitting diodes; 1.5 micron; 6 mA; ASIC; CMOS technology; LED array driver; automatic in-situ temperatures compensation; constant-current sources; current regulation; double-metal; field programmable temperature coefficients; high-performance printing system; programmable thermal coefficients; single-poly process; Application specific integrated circuits; Automatic control; CMOS technology; Current control; Digital control; Kelvin; Light emitting diodes; Power supplies; Printing; Temperature;
Conference_Titel :
ASIC Conference and Exhibit, 1991. Proceedings., Fourth Annual IEEE International
Conference_Location :
Rochester, NY
Print_ISBN :
0-7803-0101-3
DOI :
10.1109/ASIC.1991.242857
