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UCC21750: UCC21750的DESAT检测断开之后,芯片仍然报FLT故障

Part Number: UCC21750

您好,UCC21750驱动一个SiC功率器件,电流上升之后FLT报故障变为低电平,为了测试,我把芯片的DESAT引脚后的检测电路和SiC器件的D极断开,同时把DESAT引脚和COM引脚短接上,继续加载测试,但是电流上升之后仍然报FLT故障,而且保护的过流点和没有取消DESAT检测之前是一样。