3843 升压电源,从轻载 到重载的 VGS,VDS波形,请老鸟点评!

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上面亮幅图是轻载,但输入电压不同,一个是最低电压输入,另外一个正常电压输入.

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重载的情况,分别是正常电压输入,和最低电压输入

3843 反激拓扑结果,效率比较低,不知是什么原因?

图中 VDS 在 栅极导通时的 小电压尖峰 是如何产生的,想不明白!