Programmable battery protector which has an under voltage rating of 2.65V and over voltage rating of 3.65V

Hi Danilo,

Thanks.  Most of our protectors are "programmable" at the factory, but may not be available with specific voltages.  BQ77905 can be stacked for 20 cells, but does not have a configuration defined with the voltages you indicate.  BQ77915 adds a few features, again does not have a present configuration with those voltages.  The BQ77216 has OV and UV protection outputs but outputs would need to be combined externally, it is a relatively new device with fewer configurations defined.

For a user programmable device with protection see the BQ76930.  The data sheet section 10.3.1.2.1 Integrated Hardware Protections describes that the thresholds you indicate are within the range of the IC, but since each part has individual calibration a specific code must be calculated per part. BQ76930 needs a MCU to set it up each power cycle. These can be stacked for 20 cells with an external circuit such as TIDA-01093.  The newer BQ76942 family also has programmable thresholds.  They might be stacked similarly to the BQ76930, there is not a TIDA showing an example at this time. The typical FET output is different and a different fault signaling circuit will be needed. Both of these families have other members which allow up to 32 cells.

For higher cell counts consider the automotive type monitor devices which have built in stacking interfaces such as BQ76PL455A.  The various parts will have different features and will need a MCU for setup and may not have protection switching features.  See the monitor selection at https://www.ti.com/power-management/battery-management/monitors-balancers/overview.html