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LM3478: 反激控制,为什么空载输出正常,带载2W直接拉低输出到0V

Part Number: LM3478
Other Parts Discussed in Thread: LM317,

输入24V,输出13V,空载是稳定的(后端只有LM317,317输出也是空载)。

13V处带电子负载2W以上,输出电压就变成0V,这时输入电压未拉低(输入功率是足够的)