芯片是否存在两种丝印，新款与老款之分，还是版本的问题，用在相同的PCB上
本次采购的无法正常驱动24V直流电机了，电流达到0.3a就截止输出了，按设计能达到2.5A，之前采购的芯片（老款）是可以达到的
之前的
本次采购丝印如下
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