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不知道为什么drv8302经常烧

Other Parts Discussed in Thread: DRV8302

DRV8302的VDS过流检测设置小了。很容易就报过流,设置大了,很容易烧DRV8302,目前采用的三电阻采样,想把无刷电机响应调快点,响应快就很容易烧芯片,测过了电源和地之间没有短路,GS之间没有短路,mos管完好,找不出是哪里烧了,请大神赐教。

现在发现BST_A引脚对地电阻20多欧姆