SLUSE97 November 2023 BQ76905
PRODUCTION DATA
The BQ76905 voltage measurements are taken in a nested measurement loop that consists of multiple measurement slots. All active cell voltages are measured on each ADSCAN loop, then one slot is a "shared slot," which is used for different purposes (additional system and diagnostic measurements) on successive ADSCAN loops, resulting in a total of 3 (if two cells are active) to 6 (if 5 cells are active) slots per ADSCAN loop. The width of the measurement slots is programmable, which allows each ADSCAN to range from approximately 1.1 ms to approximately 18 ms during NORMAL mode, based on setting.
The schedule of measurements is different in SLEEP mode versus NORMAL mode, and there is also a special measurement schedule used after initial power-up or reset to provide a fast power-up for the system. The details of the remaining measurement loops and the differences versus operating mode are described in the BQ76905 Technical Reference Manual.