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When VCCA is powered normally, the power output is controlled by nPWRON/ENABLE signal.About dozens of times, all power supplies fail to output, except VOUT_LDOVRTC(Pin3).
请问:
故障现象:
正常时,enable 约20ms脉冲,LDOVINT一直输出1.8V;故障时enable约20ms低脉冲抬高后LDOVINT拉低会,一直不输出;另出现过enable拉高时,LDOVINT输出出现毛刺,后正常输出1.8V~~
HI
几十或上百次测试, 是做芯片的启动,关闭测试吗? 上百次后芯片还能够正常启动,还是芯片已经损坏?