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请用查分探头测一下电容C7上的电压
0.1uf电容两端大概9.8V左右的电压
大神，我用的原理图和你的一样， 就是VIN\UVLO\FB\HB脚的参数都正常，但SS处于低点位，没有输出PWM，怎么破？
