TPS61194PWPR,LCD驱动芯片在低温-30度下8小时候背光没有输出,使能输入,PWM均输入正常
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Hi
常温下再启动是否正常?
在-40℃下,测量其信号,例如第二脚LDO输出是否稳定?输入输出是否稳定?
(一般这类异常是要测试确认的,因为通常情况下电路都是没有大的问题的,可能问题出在layout,或者电容上, 因为低温下电容容值会跌落,可能导致一些电压不稳定致使芯片工作异常)