TPS3823-33DBVR 芯片由MOS管控制电源,复位脚上拉10K电阻,当芯片不供电时,复位脚1.5V电平。
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问题以解决是因为WDI脚灌电压进去,造成TPS3823工作,当给芯片通电后,由于芯片检测到电压低于3.3V所以发生复位。