Title :
A single stage high power factor supply for HB-LEDs
Author_Institution :
EEE Dept., RIT, Kottayam, India
Abstract :
In recent years, high brightness light emitting diodes are widely used in many applications. This paper presents an integrated converter topology for driving HB LEDs. The integrated buck flyback converter is a single stage, low cost, high power factor AC-DC converter with fast output regulation. The converter is used to provide power factor correction in streetlight application. To obtain high power factor, the buck stage and flyback stage are operated in discontinuous mode. Dimming operation of HB LED is also described. A closed loop is used for enabling the PWM dimming. The simulation studies using MATLAB/Simulink is also presented.
Keywords :
AC-DC power convertors; brightness; closed loop systems; integrated optics; light emitting diodes; mathematics computing; physics computing; power factor correction; pulse width modulation; AC-DC converter; LED output regulation; MATLAB-simulink; PWM dimming; closed loop system; dimming operation; discontinuous mode; high brightness light emitting diodes; integrated buck flyback converter; integrated converter topology; single stage high power factor; streetlight application; Indium tin oxide; Light emitting diodes; Magnetic fields; Power generation; Pulse width modulation; Resistance; Switches; DCM; HB LEDs; IBFC topology; ac/dc converter; power factor correction; single-stage;
Conference_Titel :
Signal Processing, Communication, Computing and Networking Technologies (ICSCCN), 2011 International Conference on
Conference_Location :
Thuckafay
Print_ISBN :
978-1-61284-654-5
DOI :
10.1109/ICSCCN.2011.6024646
