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DRV8301开发板为什么没有隔离芯片?

Other Parts Discussed in Thread: DRV8301

控制电机的板子上面一般都会有数字隔离芯片,用于隔离PWM等信号。TI提供的DRV8301电机开发板只是将霍尔信号和编码器信号进行隔离,却将PWM信号直接连到DRV8301驱动芯片上,为什么?