Reduced power processing is a new trend to improve the conversion efficiency of light-emitting diode (LED) driver systems. Based on the concept, a new LED driver architecture is proposed in this article, which requires fewer power semiconductors compared with prior works, leading to the potential of lower cost and higher efficiency. A new ac/dc LED driver topology is derived accordingly based on the architecture to achieve the constant output current and unity power factor with significant energy storage reduction of the 100-/120-Hz energy buffer. Through a split and shared inductor, the required magnetic energy storage in the derived topology is the same as the conventional single-stage power factor correction converter, indicating high power density. Experimental evaluation verifies the performance in terms of improved power quality and conversion efficiency.

中文翻译：

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具有低功耗处理和电源去耦的单相 LED 驱动器

降低功率处理是提高发光二极管 (LED) 驱动器系统转换效率的新趋势。基于这个概念，本文提出了一种新的 LED 驱动器架构，与之前的工作相比，它需要更少的功率半导体，从而具有更低的成本和更高的效率的潜力。相应地基于该架构衍生出一种新的交流/直流 LED 驱动器拓扑，以实现恒定输出电流和统一功率因数，并显着减少 100-/120-Hz 能量缓冲器的能量存储。通过分离共享电感，衍生拓扑中所需的磁能存储与传统的单级功率因数校正转换器相同，表明功率密度高。