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BQ76200: application report SLUA794 bq76200 Beyond the simple application schematic

Part Number: BQ76200


in Page13 

Discharge current is stopped but may resume if PACK pin capacitance does not discharge, i do not understand this of expression.

  • Hi User,

    See figure 16 as an example of a turn off, the FET goes off  because the gate has been pulled just below VGSTH, but there is still some minimal current as the PACK+, PACK pin, DSG pin and FET gate all fall to 0 V.    Compare that to figure 17 where the FET initially turns off, but since PACK pin is held up by a large capacitance the current resumes as the PACK pin capacitance (Cf in the figure) discharges allowing the signals to go to 0 V.