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BOOSTXL-DRV8305EVM: 驱动板是不是有问题

Part Number: BOOSTXL-DRV8305EVM
Other Parts Discussed in Thread: DRV8305, DRV8305-Q1EVM

驱动板是DRV8305,BOOSTXL-DRV8305EVM 3相驱动板,给定24V电压,输入三组PWM包括死区设置,电压幅值为3.3V,第三路PWM测试时没问题,接入到驱动板时,从接线柱引出到示波器时,第三路LOW的PWM电压只有几百毫伏,而且第三相的电压motC一直是高电平24V,是不是板子坏了。第一个图为示波器接线的位置,第三张图为初始时第三路PWM的信号,第二张图为接入驱动板时PWM的信号。第四张图紫线为motC的信号,全为高电平。