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MCT8316A: MCT8316AEVM评估板出现控制芯片异常的现象

Part Number: MCT8316A
Other Parts Discussed in Thread: , MCF8316A

使用MCT8316AEVM驱动直流无刷电机,使用可调开关电源供电,供电电压为29V,输出电流约1.3A,在调试无问题之后,进行老化测试,环境稳定约35℃,连续运行约50小时后,芯片工作不正常,电机停止运行。VM和VBAT输入端电压变为4.2V,而可调开关电压电压保持为29V,显示输出电流为0。此评估板原芯片为MCF8316A,因连续烧了两块芯片,后来更换为MCT8316A进行测试。能否帮忙分析一下原因?这两款芯片很容易坏吗?