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

fYear

1991

fDate

23-27 Sep 1991

Lastpage

37347

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;

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC Conference and Exhibit, 1991. Proceedings., Fourth Annual IEEE International

Conference_Location

Rochester, NY

Print_ISBN

0-7803-0101-3

Type

conf

DOI

10.1109/ASIC.1991.242857

Filename

242857