Open AccessModeling and Controller Design of Flyback Converter Operating in DCM for LED Constant Current Drive
Author(s) -
Wenjie Feng,
Yiwen Chen,
Jiahui Jiang,
Wenqiang Jiang
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/512/1/012172
Subject(s) - flyback transformer , control theory (sociology) , small signal model , flyback converter , controller (irrigation) , signal (programming language) , buck converter , constant current , power (physics) , constant (computer programming) , computer science , current (fluid) , buck–boost converter , flyback diode , voltage , engineering , boost converter , electrical engineering , control (management) , physics , agronomy , quantum mechanics , artificial intelligence , biology , programming language , transformer
In power converter, the system model has a significant meaning of the design of the controller and the dynamic characteristics. In this paper, the switching network average method is used to set up the small signal model of flyback circuit, which is operating in discontinuous current mode(DCM). A controller with single zero and single pole is designed based on the small signal model which is set up in this paper. Moreover, the analysis of system stability and dynamic response is proposed. Finally, the system is simulated and verified by a flyback LED constant current drive circuit (220AC input, 0.7A/16W output).