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在用BOOSTXL-3PhGaNInv驱动板中遇到的问题

Other Parts Discussed in Thread: LMG5200, INA240

买来这块板子,发现一个现象不知道怎么去理解。。在用电表测量三相输出VA,VB,VC时,按照我的理解,应该都为0,此时lmg5200芯片并没有收到pwm'波,也没有加控制板,就仅仅是给驱动板供电,为什么会有电压呢,而且这三相输出的电压还不是对称的,具体如图所示。