Adaptive current-mirror LED driver employing super-diode configuration

Author

Sung-Jin Choi

Author_Institution

Sch. of Electr. Eng., Univ. of Ulsan, Ulsan, South Korea

fYear

2014

fDate

Feb. 26 2014-March 1 2014

Firstpage

365

Lastpage

370

Abstract

An improved current-mirror LED driver is presented in this paper. Incorporating a super-diode configuration, this circuit selects a reference current automatically to prevent transistor saturation even in a wide forward voltage spread in the LED string voltage. Using a statistical cost function evaluation based on a Monte-Carlo analysis through MATLAB/PSIM co-simulation, the performance of the proposed circuit is analyzed and compared with that of the conventional circuit using a self-configurable Darlington-pair.

Keywords

Monte Carlo methods; bipolar transistors; current mirrors; diodes; driver circuits; light emitting diodes; statistical analysis; LED string voltage; MATLAB-PSIM cosimulation; Monte-Carlo analysis through; adaptive current-mirror LED driver; automatic reference current selection; self-configurable Darlington-pair transistor; statistical cost function evaluation; super-diode configuration; transistor saturation prevention; Accuracy; Cost function; Light emitting diodes; MATLAB; Resistors; Transistors; Voltage control; LED driver; current-mirror; super-diode;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Technology (ICIT), 2014 IEEE International Conference on

Conference_Location

Busan

Type

conf

DOI

10.1109/ICIT.2014.6894893

Filename

6894893