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首页> 外文期刊>Electric Power Components and Systems >High Power Factor Light-emitting Diode Driver on Digital Signal Processor Without Electrolytic Capacitor for High-power Lighting
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High Power Factor Light-emitting Diode Driver on Digital Signal Processor Without Electrolytic Capacitor for High-power Lighting

机译：无电解电容的数字信号处理器上的高功率因数发光二极管驱动器，用于大功率照明

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摘要

Electrolytic capacitor is a key factor that limits the lifetime of the driver in a high-power light-emitting diode (LED) lighting. This article presents a high-power LED lighting driver on a digital signal processor without an electrolytic capacitor. The driver is composed of three stage circuits. The first stage is the boost power factor correction converter to achieve a high power factor. As it does not use an electrolytic capacitor, the output voltage ripple is larger, which directly affects the overall performance of the LED driver. Consequently, it must be optimized through the second and third stages. The second stage is the two-output LLC (Double inductance and capacitance) resonant converter, which is driven by a digital signal processor. This stage provides galvanic isolation and reduces voltage. The third stage is the two-input buck converter based on digital signal processor control that reduces the low-frequency ripple generated from the first two stages. Moreover, the regulation of each LED string current is achieved at this stage. The simulation and experimental results show that this LED lighting driver can achieve a high power factor and good constant current characteristics.
机译：电解电容器是限制驱动器在大功率发光二极管（LED）照明中的寿命的关键因素。本文提出了一种在数字信号处理器上不带电解电容器的大功率LED照明驱动器。驱动器由三级电路组成。第一级是升压功率因数校正转换器，以实现高功率因数。由于它不使用电解电容器，因此输出电压纹波较大，这直接影响了LED驱动器的整体性能。因此，必须在第二和第三阶段对其进行优化。第二阶段是由数字信号处理器驱动的双输出LLC（双电感和电容）谐振转换器。该级提供电流隔离并降低电压。第三级是基于数字信号处理器控制的双输入降压转换器，可减少前两级产生的低频纹波。而且，在此阶段实现每个LED串电流的调节。仿真和实验结果表明，该LED照明驱动器可实现高功率因数和良好的恒定电流特性。

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