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LM5018,输入端电流电压异常

Other Parts Discussed in Thread: LM5018

用LM5018,设计降压电路,电路原理图如图所示:设计输出10V

调试的时候发现,在输入电压12V时,此时输入电流46mA,输出10V电压波纹稳定。当电压从12V开始逐渐升高时,输入电流也升高。当输入电压大于25V,输入电流大于100mA,波动较大,同时输出电压波形波动很大。

请问这种问题如何解决?