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DRV8303作为驱动芯片驱动三相桥,高边MOS无法打开

Other Parts Discussed in Thread: DRV8303

背景描述:MCU通过DRV8303驱动三相桥进而驱动无刷直流电机,本实验未连接无刷直流电机,故电路模型简化为MCU=>DRV8303=>A/B/C三相MOS桥臂,电源电压采用48V。

问题描述:MCU通过设置输出A相高边为PWM波形,其他路均为低电平,通过实验观察发现MCU的输出为波形3,高边MOS的门级为波形1,MOS无法正常打开。