Title :
A stability issue with current mode control flyback converter driving LEDs
Author :
Pang, H.M. ; Bryan, P.M.H.
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Hong Kong, Hong Kong, China
Abstract :
Use of LED lamp for lighting becomes common and power converter for LEDs is critical. This paper is about the design of stable power converter for LED lamp. In the construction of the converter, flyback topology is used together with current-controlled current mode control. LED is a current driven device with low dynamic resistance. This introduces instability to output feedback. Current mode control model with more accurate LED equivalent circuit is built on MATLAB Simulink to analysis the control aspect. A solution is figured out by adding additional resistor to output feedback loop. The proposed method is verified by experimental results.
Keywords :
LED lamps; driver circuits; electric current control; equivalent circuits; feedback; lighting control; power convertors; LED equivalent circuit; LED lamp; MATLAB Simulink; current driven device; current-controlled current mode contro; dynamic resistance; flyback converter topology; lighting; output feedback loop; stable power converter design; Feedback loop; LED lamps; Light emitting diodes; Lighting control; Mathematical model; Matrix converters; Output feedback; Power system modeling; Stability; Voltage; Current Mode Control Model; Current Program Mode Control; Flyback Converter; Light Emitted Diode; PI controller;
Conference_Titel :
Power Electronics and Motion Control Conference, 2009. IPEMC '09. IEEE 6th International
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-3556-2
Electronic_ISBN :
978-1-4244-3557-9
DOI :
10.1109/IPEMC.2009.5157604
