Non-isolated high step-up/step-down quadratic converter for light-emitting diode driving,International Journal of Circuit Theory and Applications

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Non-isolated high step-up/step-down quadratic converter for light-emitting diode driving
International Journal of Circuit Theory and Applications ( IF 1.8 ) Pub Date : 2021-04-20 , DOI: 10.1002/cta.3035
Douglas Rosa Corrêa ₁ , Aniel Silva Morais ₁ , Fernando Lessa Tofoli ₂

Affiliation

This work presents an alternating current–direct current (AC–DC) single-switch quadratic single-ended primary inductance converter (SEPIC) for applications involving light-emitting diodes (LEDs). The proposed topology is basically composed of two cascaded SEPIC stages, where the first one provides input power factor correction (PFC) and the second one allows obtaining power control (PC) for dimming purposes. It is also capable of providing high step-up or step-down without requiring the use of extreme duty ratios. A detailed qualitative analysis is derived, from which it is possible to obtain a consistent design procedure. Experimental results from a laboratory prototype are thoroughly discussed aiming at validating the theoretical assumptions.

中文翻译：

用于发光二极管驱动的非隔离式高升压/降压二次转换器

这项工作提出了一种交流-直流 (AC-DC) 单开关二次单端初级电感转换器 (SEPIC)，适用于涉及发光二极管 (LED) 的应用。所提出的拓扑基本上由两个级联 SEPIC 级组成，其中第一个提供输入功率因数校正 (PFC)，第二个允许获得用于调光目的的功率控制 (PC)。它还能够提供高升压或降压，而无需使用极端的占空比。衍生出详细的定性分析，从中可以获得一致的设计程序。深入讨论了实验室原型的实验结果，旨在验证理论假设。

更新日期：2021-04-20

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