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DRV8412: 手册中提到的current shunt resistance啥意思啊?在典型电路里也没有看到这个电阻

Part Number: DRV8412

您好:

最近选用了这颗物料,准备画PCB了,但是看到手册里提到了current shunt resistance,可是典型电路里面没有这个电阻啊,想问下这是啥意思呢?

另外,图中红圈的电阻又是做什么的呢?

非常感谢!