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F28335

F28335的控制器,控制直流电机。之前没有接放大器,电机等这些设备时,只是将程序load进芯片,芯片都没有问题,不会发热,而且,版子上提供的主电源是+5v.可是接上放大器,电机之后,芯片就会发热。请高人指教。