Here are two “Pin Equivalent Diagram” in bq30z55 and bq40z50.
– The former : CHG & DSG pumps are powered by PACK pin.
– The latter: CHG & DSG pumps are powered by BAT pin.
However, DSG pump of some gauges powered by PACK pin which can drive D-FET channel wider when low V charging.
May I learn from you why we adopt BAT pin drive pumps to replace PACK pin? Any pros and cons for this?
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