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DC-DC BUCK-BOOST AND SEPIC CONVERTERS TO DRIVE LED LIGHTS
| Content Provider | CiteSeerX |
|---|---|
| Author | Pathak, Gaurav Saxena, Anmol Ratna |
| Abstract | LEDs are current controlled device and have low dynamic resistance. To regulate current across LEDs, DC-DC Converters are used. These drivers control the power transfer from source to LEDs and hence control the brightness. This paper presents a comparative study between dc-dc buck-boost converter and SEPIC converter to drive an LED array. SEPIC converter which is a fourth-order converter provides non inverting output voltage as compared to Buck-Boost converter. Furthermore, it allows low ripples in the inductor current. Modeling of SEPIC and Buck-Boost converter with Led modeled as resistive load is also presented. A PWM control scheme is implemented to provide proper dimming control as well as to distinguish the behavior of drivers on the basis of its controlling performance. It is observed that to provide better dimming, it is advantageous to use SEPIC converter as compared to Buck-Boost converter. In order to validate the comparative analysis, simulation results are carried out in MATLAB SIMULINK. |
| File Format | |
| Access Restriction | Open |
| Subject Keyword | Sepic Converter Buck-boost Converter Power Transfer Fourth-order Converter Comparative Analysis Matlab Simulink Simulation Result Dc-dc Converter Low Dynamic Resistance Dc-dc Buck-boost Converter Led Array Pwm Control Scheme Output Voltage Current Controlled Device Resistive Load Low Ripple |
| Content Type | Text |
| Resource Type | Article |