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Hi
受制与开关电流,按照39V/0.1A输出,即便效率100%, 输入电流将是39*0.1/3=1.3A,算上电感的纹波电流,开关峰值电流就是1.5A左右。
而芯片的开关峰值电流的规格是1A, 也就是不到39V前早就保护的。