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重新确认一下RC的电阻电容，建议按照datasheet推荐来做： For most applications, a capacitor in the range of 68 pF to 120 pF gives the best results. Resistor values should be limited to between 100 kΩ and 1 MΩ as well.
FB和COMP没有建立连接，还有
ENn我是直接拉低的。