Title :
Adaptive current-mirror LED driver employing super-diode configuration
Author_Institution :
Sch. of Electr. Eng., Univ. of Ulsan, Ulsan, South Korea
fDate :
Feb. 26 2014-March 1 2014
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;
Conference_Titel :
Industrial Technology (ICIT), 2014 IEEE International Conference on
Conference_Location :
Busan
DOI :
10.1109/ICIT.2014.6894893
