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BQ40Z50-R1: bq40z50-R1 / VSS pin connection

Part Number: BQ40Z50-R1

Hi,

This may be basic question about battery pack. Basically VSS pin is connected to cell -, but in this case, the supply current of bq40z50-R1 is not flowed sense resistor so supply current can't be measured. I understand that this should be current measurement error but it's very small (tens of uA) so this error is ignored. Is my understanding correct?

Best Regards,

Sonoki / Japan Disty