A Novel Light-Emitting Diode Streetlight Driver Circuit Applied to a Direct Current-Input Voltage Source

Chun-An Cheng, Chien-Hsuan Chang, Hung-Liang Cheng, En-Chih Chang (), You-Ruei Lin and Long-Fu Lan
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Chun-An Cheng: Department of Electrical Engineering, I-Shou University, Kaohsiung City 84001, Taiwan
Chien-Hsuan Chang: Department of Electrical Engineering, I-Shou University, Kaohsiung City 84001, Taiwan
Hung-Liang Cheng: Department of Electrical Engineering, I-Shou University, Kaohsiung City 84001, Taiwan
En-Chih Chang: Department of Electrical Engineering, I-Shou University, Kaohsiung City 84001, Taiwan
You-Ruei Lin: Department of Electrical Engineering, I-Shou University, Kaohsiung City 84001, Taiwan
Long-Fu Lan: Department of Electrical Engineering, I-Shou University, Kaohsiung City 84001, Taiwan

Sustainability, 2023, vol. 15, issue 14, 1-15

Abstract: With the global advocacy of green lighting and the urgent need for energy saving and carbon reduction, more and more street lighting applications have entered the era of being replaced by light-emitting diode (LED) lighting sources. This paper presents a new LED streetlight driving circuit applied to a direct current (DC)-input voltage source, which consists of a buck converter combined with a flyback converter to reduce the number of circuit components required and to recover the leakage energy of the transformer to improve energy conversion efficiency. In addition, this study also completed the analysis of the operational principle of the new LED streetlight driving circuit, and developed a prototype LED streetlight driver with DC-input voltage of 48V and output power of 72 W (36 V/2 A). Finally, the measurement results of the prototype circuit show that the output voltage ripple rate was less than 15%, the output current ripple rate was less than 6%, and the circuit efficiency was as high as 91%.

Keywords: converter; direct current (DC)-input voltage source; driver circuit; light-emitting-diode (LED); streetlight (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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