LED Driver With Reduced Redundant Power Processing And Dimming For Street Lighting Applications

This paper presents a light-emitting diode (LED) driver with dimming capability for street lighting application. The power reprocessing is reduced by the use of a partial cascade structure, which requires an isolated converter at the reprocessing stage. A SEPIC converter is used in discontinuous con...

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Bibliographic Details
Main Authors: Bekoski, Kleber Chan, Gobbato, Cassio, Moraes, Cassiano Ferro, Weber Denardin, Gustavo, Pelegrini Lopes, Juliano de
Format: Conference Proceeding
Language:English
Subjects:
Capacitance
Capacitors
Dimming
Flicker-free
Inductance
Light emitting diodes
Light-emitting diode drivers
Lighting
Partial cascade
Power factor correction
Switches
Vehicles
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Summary:This paper presents a light-emitting diode (LED) driver with dimming capability for street lighting application. The power reprocessing is reduced by the use of a partial cascade structure, which requires an isolated converter at the reprocessing stage. A SEPIC converter is used in discontinuous conduction mode of current for power factor correction. At the power control stage, a flyback converter is used in discontinuous current mode, reprocessing only 20% of the total output power. A proportional integral (PI) controller maintains the output current regulated. Through the methodology employed it was possible to reduce the capacitances of the circuit and substitutes the electrolytic technology for capacitances with longer lifespan. Experimental results, obtained with a 70 W prototype shows that the circuit complies with the IEEE Std. 1789-2015 over the entire operating range. In addition, due the low total harmonic distortion of the input current, the prototype complies with the IEC 61000-3-2 Class C. The measured results for efficiency and power factor were above 90% and 0.99, respectively.
ISSN:2643-9778
DOI:10.1109/COBEP/SPEC44138.2019.9065609