Other Parts Discussed in Thread: BQ76942, BQ76930, BQ77915
We have been using the BQ77PL900 BMS in some of our Battery Systems for several years and have a recent request from one customer to be able to "over-ride" the function of the BMS turning OFF the discharge FET in the event of Over-Current, Short-Circuit, etc. (for a mission critical application) and continue to connect the Battery Cells to the Load. While this could be implemented with a parallel discharge path (another set of FETs), we would like to scope a couple of additional options;
1. Can the BMS (via an MCU) be commanded to NOT respond to the "DSG OFF" command due to the above mentioned faults...OR
2. Can a path on the DSG pin be connected to ground through a resistor and/or diode coupled (cathode connected to DSG pin and anode pulled up to the rail) to pull the DSG pin low to keep the discharge FET ON regardless of BMS control of this pin (regardless of the above mentioned faults)?
Thank you!
