SLUAB35 September   2025 BQ76905 , BQ76907

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Normal Mode
    1. 2.1 For 7 Cell Battery Pack
    2. 2.2 Less Than 7 Cell Battery Pack
  6. 3Sleep Mode
  7. 4Startup Mode
  8. 5Cell Balance Mode
  9. 6Summary
  10. 7References

3 Sleep Mode

When the device is in Sleep Mode, to save power, BQ76907 does not perform sampling all the time like in Normal Mode, but can perform sampling intermittently. As shown in Figure 3-1, in Sleep Mode, BQ76907 can maintain the IDLE state for a period of time and then enter the Burst sampling stage. The difference between Burst sampling and the ADSCAN LOOP mentioned previously is that Burst sampling can collect all cell voltages and Shared Slots at one time, to reduce the number of Bursts and save power consumption in Sleep Mode.

Voltage Measurement Loop in Sleep Mode (7S version) Figure 3-1 Voltage Measurement Loop in Sleep Mode (7S version)

The IDLE state time can be configured through the register Power:Sleep:Voltage Time. However, if the BQ76907 exits Sleep Mode during the Power:Sleep:Voltage Time, this can immediately perform a round of Burst sampling and then enter the Normal Mode sampling mode described previously.