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首页> 外文期刊>IEEE Transactions on Power Electronics >A Single-Switch AC–DC LED Driver Based on a Boost-Flyback PFC Converter With Lossless Snubber
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A Single-Switch AC–DC LED Driver Based on a Boost-Flyback PFC Converter With Lossless Snubber

机译：基于升压反激PFC转换器且无损耗缓冲器的单开关AC-DC LED驱动器

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摘要

A single-switch ac–dc light-emitting-diode (LED) driver based on boost-flyback power factor correction (PFC) converter with a lossless snubber is proposed. In the proposed LED driver, the boost PFC module is designed to be operated in the discontinuous-conduction mode to achieve a high power factor. The dc–dc flyback module is designed to provide input–output electrical isolation to improve safety. The lossless snubber circuit clamps the peak voltage spike of switch to a low voltage and the leakage inductor energy is recycled via the dc–dc flyback module. Additionally, a low-voltage-rating capacitor can be used as the dc-bus capacitor because some of the input power is directly conducted to the output; the remaining power is stored in the dc-bus capacitor. Therefore, the proposed LED driver can provide a high power factor and a high power conversion efficiency. These results are verified for an output of 48 V and 2 A for the experimental prototype.
机译：提出了一种基于具有无损耗缓冲器的升压-反激功率因数校正（PFC）转换器的单开关交流-直流发光二极管（LED）驱动器。在提出的LED驱动器中，升压PFC模块被设计为以非连续导通模式工作，以实现高功率因数。 dc-dc反激模块旨在提供输入-输出电气隔离，以提高安全性。无损缓冲电路将开关的峰值电压尖峰钳位到低电压，泄漏电感器的能量通过dc-dc反激模块回收。另外，由于某些输入功率直接传导至输出，因此可以将低压额定电容用作直流总线电容器。剩余功率存储在直流总线电容器中。因此，提出的LED驱动器可以提供高功率因数和高功率转换效率。对于实验原型，对于48 V和2 A的输出，这些结果得到了验证。

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