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关于BOOST电路传函的疑问



TI工程师你好!

我在TI出的“Practical Feedback Loop Analysis for Voltage-Mode Boost Converter”PDF里看到关于BOOST传递函数的说明,如下图所示:

上图中的传递函数中的Vg是什么变量。D'是代表占空比还是求导?le是什么变量?麻烦解答一下。谢谢!

参考的是 Lee, S. W. "Practical Feedback Loop Analysis for Voltage-Mode Boost Converter." Application Report No. SLVA057. Texas Instruments. January 2014.