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LMT87: 电动机有大电流时,LMT87输出会降到0V

Part Number: LMT87

当电动机有大电流时, LMT87的Vcc会降到0V , LMT87的输出也降到0V
但当LMT87 Vcc上升到3.3V , LMT87的输出一样是在0V
请问为何会这样