SLUA906A January   2020  – September 2020 BQ77915

 

  1.   Trademarks
  2. 1Configuration
    1. 1.1 General Setup Instructions
  3. 2Functionality
    1. 2.1 Undervoltage (UV)
    2. 2.2 Overvoltage (OV)
  4. 3Troubleshooting FAQ
  5. 4References
  6.   Revision History

Undervoltage (UV)

The UV fault test focuses on the DSG turnoff time as cell 17 is monitored below the desired threshold. In Figure 2-1, it is clear that DSG falls and stays low while any cell has a UV fault detected. When all faults are removed the DSG rises, see Figure 2-2. When examining the delay of the DSG rise and fall by measuring the delta between the UV threshold and DSG rise and fall, both figures display a similar response time of close to 1s due to the large RGS. This is expected for the BQ77915 and needs to be accounted for appropriately in any system.

Figure 2-1 UV Detection
Figure 2-2 UV Recovery