SLVAE87B December   2020  – June 2025 BQ79600-Q1 , BQ79612-Q1 , BQ79614-Q1 , BQ79616-Q1 , BQ79652-Q1 , BQ79654-Q1 , BQ79656-Q1

1.   1
2.   Abstract
3.   Trademarks
4. 1 NPN LDO Supply
5. 2 AVDD, CVDD Outputs and DVDD, NEG5, REFHP and REFHM
   1. 2.1 Base Device
   2. 2.2 Design Summary
6. 3 OTP Programming
7. 4 Cell Voltage Sense (VCn) and Cell Balancing (CBn)
   1. 4.1 Cell Voltage Sense (VCn)
   2. 4.2 Cell Balancing (CBn)
      1. 4.2.1 Non-Adjacent Cell Balancing
      2. 4.2.2 Adjacent Cell Balancing
      3. 4.2.3 Cell Balancing With External FET
   3. 4.3 Using Fewer Than 16 Cells
      1. 4.3.1 Design Summary
8. 5 Bus Bar Support
   1. 5.1 Bus Bar on BBP or BBN
   2. 5.2 Typical Connection
      1. 5.2.1 Cell Balancing Handling
   3. 5.3 Bus Bar on Individual VC Channel
   4. 5.4 Multiple Bus Bar Connections
      1. 5.4.1 Two Bus Bar Connections to One Device
      2. 5.4.2 Three Bus Bar Connections to One Device
      3. 5.4.3 Cell Balancing Handling
9. 6 TSREF
10. 7 General Purpose Input-Output (GPIO) Configurations
    1. 7.1 Ratiometric Temperature Measurement
    2. 7.2 SPI Mode
       1. 7.2.1 Support 8 NTC Thermistors With SPI Slave Device
       2. 7.2.2 Design Summary
11. 8 Base and Bridge Device Configuration
    1. 8.1 Power Mode Pings and Tones
       1. 8.1.1 Power Mode Pings
       2. 8.1.2 Power Mode Tones
       3. 8.1.3 Ping and Tone Propagation
    2. 8.2 UART Physical Layer
       1. 8.2.1 Design Considerations
12. 9 Daisy-Chain Stack Configuration
    1. 9.1 Communication Line Isolation
       1. 9.1.1 Capacitor Only Isolation
       2. 9.1.2 Capacitor and Choke Isolation
       3. 9.1.3 Transformer Isolation
       4. 9.1.4 Design Summary
    2. 9.2 Ring Communication
    3. 9.3 Reclocking
       1. 9.3.1 Design Summary
13. 10Multidrop Configuration
14. 11Main ADC Digital LPF
15. 12AUX Anti Aliasing Filter (AAF)
16. 13Layout Guidelines
    1. 13.1 Ground Planes
    2. 13.2 Bypass Capacitors for Power Supplies and References
    3. 13.3 Cell Voltage Sensing
    4. 13.4 Daisy Chain Communication
17. 14BCI Performance
18. 15Common and Differential Mode Noise
    1. 15.1 Design Consideration
19. 16Summary
20. 17References
21. 18Revision History

BQ7961x-Q1 Design Recommendations for High Voltage Automotive BMS