This paper introduces a novel boundary conduction mode (BCM) controlled microconverter for photovoltaic (PV) application in order to provide high conversion efficiency over a wide input voltage operating range. Within the wide input range for the PV panel, there is no need to change the operating modes according to the PV panel voltage. The leakage inductance current can work in BCM with fixed switching frequency. The operation mode analysis is given first. Then, the operating principle of the proposed BCM and its implementation are introduced. Loss breakdown of the prototype using GaN devices is analyzed and compared with the same voltage-rating silicon mosfets. A 300-W microconverter was fabricated and experimental results are provided to verify the effectiveness of the proposed BCM control.

中文翻译：

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一种采用固定频率 BCM 控制方法的基于 GaN 的微型转换器用于光伏应用

本文介绍了一种用于光伏 (PV) 应用的新型边界传导模式 (BCM) 控制微转换器，以便在宽输入电压工作范围内提供高转换效率。在光伏板的宽输入范围内，无需根据光伏板电压改变工作模式。漏感电流可以在开关频率固定的 BCM 中工作。首先给出运行模式分析。然后，介绍了所提出的 BCM 的工作原理及其实现。分析了使用 GaN 器件的原型的损耗击穿，并与相同额定电压的硅 mosfet 进行了比较。制造了一个 300-W 微转换器，并提供了实验结果来验证所提出的 BCM 控制的有效性。