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BQ25750: REGN 引脚电压只有1.46v,

Part Number: BQ25750

之前一直正常的,现在在测试大电流时(大概6-7A) 出现了这个问题,并且不能恢复,可能是什么原因,有什么建议?原理图是根据BQ25750EVM 这个的基础上自己做的原型板,测试的电压一直是12V,