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BQ76952: DSG PIN voltage only 8V

Part Number: BQ76952


The charge and discharge FETs arranged in series, when the charge FET is turn off(the CHG PIN is off ),the DSG PIN voltage is only 8V(P+/P- no load);But when we add a load at P+/P- (Like a 1M resistor),the DSG PIN voltage rise up to 11V.We can not find the reason.