Open AccessDynamic response analysis of buck driver for LED based on second‐order model
Author(s) -
Li Gang,
Yu Shengbao,
Shi Jing
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2016.2572
Subject(s) - nonlinear system , control theory (sociology) , power (physics) , linear model , buck converter , controller (irrigation) , voltage , nonlinear model , diode , computer science , engineering , physics , electrical engineering , control (management) , agronomy , quantum mechanics , artificial intelligence , machine learning , biology
The voltage–current characteristics of high‐power LED are different from the conventional power diodes. Generally, the linear model of LED is used in the controller design for LED drivers. A nonlinear model of LED based on the V – I characteristics of LB‐W5SM from Osram opto semiconductors company is built. The nonlinear model of LED is a second‐order model. The dynamic performance of buck driver with nonlinear model of high‐power LED is analysed. The dynamic equations of the V – I characteristics are deduced with curve‐fitting. The comparison simulations of proportional–integral‐controlled buck drivers with linear model and nonlinear model are conducted. The dynamic response of the second‐order model driver is faster than the linear model.