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LM5148: LM5148输出2s后掉电压

Part Number: LM5148

LM5148 输入48V输出24V,EN上电2S后电压 跌落到2V,LM5148接电子负载输出3A没有问题,实际工程上的负载三个步进电机驱动,一个MCU,一个i.M6uLL 核心板。用直流电源供电的时候观察到步进电机运行过程中电流在2A以内。但是上电2s的时间刚好是MCU控制步进电机校准的时间。