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BQ2970: Vss connect to GND or Cell-

Part Number: BQ2970

Hi Team,

I am confused about the relationship between Vss, cell-, pack- and Gnd.

Vss connect to GND in EVM, but connect to cell- in data sheet typical application. What is the different?

We use coin battery, and the schematic connect Vss to BAT-, is this correct?

Thanks