Part Number: BQ34110
My query is about is about protection of bq34110 during Short-Circuit in Discharge (SCD) event.
In the datasheet, the absolute maximum voltage for the SRP pin is down to -0.3V.
Say there is a short-circuit between PACK+ and PACK- terminals, with a typical current of 60A.
The typical short-circuit response time of most BMS ICs is 300us-600us.
That means that even with the suggested filter on the SRP and SRN pins of 100nF + 100Ohm, and sense resistor of 10 mOhm, the voltage on the SRP pin will reach -0.6V which is in violation of the absolute maximum ratings.
Is there any way to protect the bq34110 during such SCD event?