LM2841输入电压24V,输出5V,电路:
空载时负载在5mA左右,但是需要周期性(大约2秒左右)点亮LED,LED输出20mA左右,发现只有一点亮LED,
输出电压被拉低100mA,LED关闭,输出电压回升,这是为何?
空载时SW波形:
LED点亮,输出20mA,SW波形:
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