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BQ76952: BREG上电电压输出异常问题

Part Number: BQ76952

BQ76952的第37PIN-BREG上电时正常情况应该输出6V左右电压,此时第36PIN-REGIN5V电压,本次贴片回来的板子中,第37PIN-BREG管脚上电时只能输出2.5V左右的电压,所以第36PIN REGIN没有电压,想了解下是什么原因导致PIN-BREG输出电压异常