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功率MOS栅极电压变化过程

麻烦帮我解释一下开关电源中功率MOS栅极电压从低到高具体的变化过程?比如从0伏跳变到5伏的这个上升沿过程,MOS内部是怎么变化的,都有哪些电容参与了这个过程,它们具体是怎么样的过程?谢谢。