A method of maintaining high power-conversion efficiency across the entire load range and its circuit implementations are described. The proposed method substantially increases the conversion efficiency at light loads by minimizing switching and driving losses of semiconductor switches, as well as core losses of magnetic components. These losses are minimized by periodically turning off and on the power converter and by controlling the converter so that when the converter is on it operates at the power level that exhibits the maximum efficiency. The performance of the proposed method was evaluated on a 500-W, 400-V/12-V dc/dc converter and a 1kW ac/dc boost PFC front end.
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机译：描述了一种在整个负载范围内保持高功率转换效率及其电路实现的方法。该方法通过最小化半导体开关的开关和驱动损耗以及磁性部件的核心损耗，基本上提高了光负荷的转换效率。这些损耗通过定期关闭和电源转换器并通过控制转换器来最小化，使得当转换器上的转换器上时，它在表现出最大效率的功率水平上操作。在500W，400V / 12-V DC / DC转换器和1KW AC / DC升压PFC前端评估所提出的方法的性能。
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