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输入电压24V，输出电压19V，输出接5欧姆负载，当输出到达19V以后，马上就会关闭输出。
把输入电压调高或者输出电压稍微调低，可以稳定输出。
能否分析一下会是什么原因导致的？
这是仿真的结果，最上面是SS电容的电压。
