Title :
A scalable HB-LED driver for multi-color Adaptive lighting systems
Author :
MODEPALLI, KUMAR ; Parsa, Leila
Author_Institution :
Dept. of Electr., Comput., & Syst. Eng., Rensselaer Polytech. Inst., Troy, NY, USA
Abstract :
In this paper a HB- LED driver that can drive multi-color HB-LED strings using Single Inductor Multiple Current Output (SIMCO) buck converter topology is presented. Constant current sources are required to drive LED strings due to their non-linear I-V characteristics. In the proposed topology the average current in multi-color LED strings are controlled independently by using a combination of non-linear charge control and traditional Average Current Mode Control (ACMC) from a single DC voltage source. The SIMCO buck converter is operated in Continuous Conduction Mode (CCM) with ACMC to realize a constant source feeding multi-color LED strings. Simulation and experimental results of a high color rendering index (CRI) multi-color LED lighting system with 48V DC input and 500lm output are presented.
Keywords :
driver circuits; electric current control; light emitting diodes; lighting; nonlinear control systems; power convertors; ACMC; CCM; CRI multicolor LED lighting system; SIMCO buck converter topology; average current mode control; constant current sources; constant source feeding multicolor LED strings; continuous conduction mode; high color rendering index; multicolor adaptive lighting systems; nonlinear I-V characteristics; nonlinear charge control; scalable HB-LED driver; single DC voltage source; single inductor multiple current output buck converter topology; voltage 48 V; Color; Inductors; Light emitting diodes; Lighting; Switches; Voltage control; Average current Mode Control (ACMC); Charge-Control; LED Driver; Single Inductor Multiple Output (SIMO);
Conference_Titel :
Applied Power Electronics Conference and Exposition (APEC), 2015 IEEE
Conference_Location :
Charlotte, NC
DOI :
10.1109/APEC.2015.7104453
