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应用于1-MHzBoostPFC变换器的自适应连续电流源驱动

, PP. 111-118

Keywords: 电流源驱动,功率因数校正,功率MOSFET,MHz开关频率,Boost变换器

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Abstract:

针对高频功率因数校正(powerfactorcorrection,PFC)变换器,提出自适应电流源驱动电路(currentsourcedriver,CSD)。由于PFC变换器的占空比在一个输入工频周期内不断变化,半桥结构CSD驱动电路很难应用于PFC场合中。为了解决上述问题,提出全桥结构CSD电路。该CSD电路具有连续电感电流,且驱动电流会随着主功率MOSFET开关电流的自适应调整,以实现最优设计。详细给出工作原理、损耗分析和设计优化方法,并进行实验验证。

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