SLUUCI8 November   2023 BQ76905

1.   1
2.   Read This First
   1.     About This Manual
   2.     Battery Notational Conventions
   3.     Trademarks
   4.     Glossary
3. 1 Introduction
4. 2 Device Description
   1. 2.1 Overview
   2. 2.2 Functional Block Diagram
5. 3 Device Configuration
   1. 3.1 Direct Commands and Subcommands
   2. 3.2 Configuration Using OTP or Registers
   3. 3.3 Data Formats
      1. 3.3.1 Unsigned Integer
      2. 3.3.2 Integer
      3. 3.3.3 Hex
6. 4 Device Security
7. 5 Measurement Subsystem
   1. 5.1 Voltage Measurement
      1. 5.1.1 Voltage Measurement Schedule
      2. 5.1.2 Unused VC Cell Input Pins
      3. 5.1.3 General Purpose ADCIN Functionality
   2. 5.2 Coulomb Counter and Digital Filters
   3. 5.3 Internal Temperature Measurement
   4. 5.4 Thermistor Temperature Measurement
   5. 5.5 Measurement Calibration
8. 6 Protection Subsystem
   1. 6.1  Protections Overview
   2. 6.2  Protection FET Drivers
   3. 6.3  Cell Overvoltage Protection
   4. 6.4  Cell Undervoltage Protection
   5. 6.5  Short Circuit in Discharge Protection
   6. 6.6  Overcurrent in Charge Protection
   7. 6.7  Overcurrent in Discharge 1 and 2 Protections
   8. 6.8  Current Protection Latch
   9. 6.9  CHG Detector
   10. 6.10 Overtemperature in Charge Protection
   11. 6.11 Overtemperature in Discharge Protection
   12. 6.12 Internal Overtemperature Protection
   13. 6.13 Undertemperature in Charge Protection
   14. 6.14 Undertemperature in Discharge Protection
   15. 6.15 Host Watchdog Protection
   16. 6.16 Cell Open Wire Detection
   17. 6.17 Voltage Reference Measurement Diagnostic Protection
   18. 6.18 VSS Measurement Diagnostic Protection
   19. 6.19 REGOUT Diagnostic Protection
   20. 6.20 LFO Oscillator Integrity Diagnostic Protection
   21. 6.21 Internal Factory Trim Diagnostic Protection
9. 7 Device Status and Controls
   1. 7.1 0x00 Control Status() and 0x12 Battery Status() Commands
   2. 7.2 LDOs
   3. 7.3 ALERT Pin Operation
   4. 7.4 TS Pin Operation
   5. 7.5 Programmable Timer
   6. 7.6 Device Event Timing
10. 8 Operational Modes
    1. 8.1 Overview of Operational Modes
    2. 8.2 NORMAL Mode
    3. 8.3 SLEEP Mode
    4. 8.4 DEEPSLEEP Mode
    5. 8.5 SHUTDOWN Mode
    6. 8.6 CONFIG_UPDATE Mode
11. 9 I2C Serial Communications
    1. 9.1 I2C Serial Communications Interface
12. 10Cell Balancing
    1. 10.1 Cell Balancing
13. 11Commands and Subcommands
    1. 11.1 Direct Commands
    2. 11.2 Bit field Definitions for Direct Commands
       1. 11.2.1  Safety Alert A Register
       2. 11.2.2  Safety Status A Register
       3. 11.2.3  Safety Alert B Register
       4. 11.2.4  Safety Status B Register
       5. 11.2.5  Battery Status Register
       6. 11.2.6  Alarm Status Register
       7. 11.2.7  Alarm Raw Status Register
       8. 11.2.8  Alarm Enable Register
       9. 11.2.9  FET CONTROL Register
       10. 11.2.10 REGOUT CONTROL Register
       11. 11.2.11 DSG FET Driver PWM Control Register
       12. 11.2.12 CHG FET Driver PWM Control Register
    3. 11.3 Command-only Subcommands
    4. 11.4 Subcommands with Data
    5. 11.5 Bit field Definitions for Subcommands
       1. 11.5.1 DEVICE NUMBER Register
       2. 11.5.2 FW VERSION Register
       3. 11.5.3 HW VERSION Register
       4. 11.5.4 SECURITY KEYS Register
       5. 11.5.5 CB ACTIVE CELLS Register
       6. 11.5.6 PROG TIMER Register
       7. 11.5.7 PROT RECOVERY Register
14. 12Data Memory
    1. 12.1 Calibration
       1. 12.1.1 Calibration:Voltage
          1. 12.1.1.1 Calibration:Voltage:Cell 1 Gain
          2. 12.1.1.2 Calibration:Voltage:Cell 2 Gain Delta
          3. 12.1.1.3 Calibration:Voltage:Cell 3 Gain Delta
          4. 12.1.1.4 Calibration:Voltage:Cell 4 Gain Delta
          5. 12.1.1.5 Calibration:Voltage:Cell 5 Gain Delta
          6. 12.1.1.6 Calibration:Voltage:Stack Gain
       2. 12.1.2 Calibration:Current
          1. 12.1.2.1 Calibration:Current:Curr Gain
          2. 12.1.2.2 Calibration:Current:Curr Offset
          3. 12.1.2.3 Calibration:Current:CC1 Gain
          4. 12.1.2.4 Calibration:Current:CC1 Offset
       3. 12.1.3 Calibration:Temperature
          1. 12.1.3.1 Calibration:Temperature:TS Offset
          2. 12.1.3.2 Calibration:Temperature:Int Temp Gain
          3. 12.1.3.3 Calibration:Temperature:Int Temp Offset
    2. 12.2 Settings
       1. 12.2.1 Settings:Configuration
          1. 12.2.1.1 Settings:Configuration:Power Config
          2. 12.2.1.2 Settings:Configuration:REGOUT Config
          3. 12.2.1.3 Settings:Configuration:I2C Address
          4. 12.2.1.4 Settings:Configuration:I2C Config
          5. 12.2.1.5 Settings:Configuration:DA Config
          6. 12.2.1.6 Settings:Configuration:Vcell Mode
          7. 12.2.1.7 Settings:Configuration:Default Alarm Mask
          8. 12.2.1.8 Settings:Configuration:FET Options
          9. 12.2.1.9 Settings:Configuration:Charge Detector Time
       2. 12.2.2 Settings:Cell Balancing
          1. 12.2.2.1 Settings:Cell Balancing:Balancing Configuration
          2. 12.2.2.2 Settings:Cell Balancing:Min Temp Threshold
          3. 12.2.2.3 Settings:Cell Balancing:Max Temp Threshold
          4. 12.2.2.4 Settings:Cell Balancing:Max Internal Temp
       3. 12.2.3 Settings:Protection
          1. 12.2.3.1 Settings:Protection:Enabled Protections A
          2. 12.2.3.2 Settings:Protection:Enabled Protections B
          3. 12.2.3.3 Settings:Protection:DSG FET Protections A
          4. 12.2.3.4 Settings:Protection:CHG FET Protections A
          5. 12.2.3.5 Settings:Protection:Both FET Protections B
          6. 12.2.3.6 Settings:Protection:Body Diode Threshold
          7. 12.2.3.7 Settings:Protection:Cell Open Wire NORMAL Check Time
          8. 12.2.3.8 Settings:Protection:Cell Open Wire SLEEP Check Time
          9. 12.2.3.9 Settings:Protection:Host Watchdog Timeout
    3. 12.3 Protections
       1. 12.3.1 Protections:Cell Voltage
          1. 12.3.1.1 Protections:Cell Voltage:Cell Undervoltage Protection Threshold
          2. 12.3.1.2 Protections:Cell Voltage:Cell Undervoltage Protection Delay
          3. 12.3.1.3 Protections:Cell Voltage:Cell Undervoltage Protection Recovery Hysteresis
          4. 12.3.1.4 Protections:Cell Voltage:Cell Overvoltage Protection Threshold
          5. 12.3.1.5 Protections:Cell Voltage:Cell Overvoltage Protection Delay
          6. 12.3.1.6 Protections:Cell Voltage:Cell Overvoltage Protection Recovery Hysteresis
       2. 12.3.2 Protections:Current
          1. 12.3.2.1  Protections:Current:Overcurrent in Charge Protection Threshold
          2. 12.3.2.2  Protections:Current:Overcurrent in Charge Protection Delay
          3. 12.3.2.3  Protections:Current:Overcurrent in Discharge 1 Protection Threshold
          4. 12.3.2.4  Protections:Current:Overcurrent in Discharge 1 Protection Delay
          5. 12.3.2.5  Protections:Current:Overcurrent in Discharge 2 Protection Threshold
          6. 12.3.2.6  Protections:Current:Overcurrent in Discharge 2 Protection Delay
          7. 12.3.2.7  Protections:Current:Short Circuit in Discharge Protection Threshold
          8. 12.3.2.8  Protections:Current:Short Circuit in Discharge Protection Delay
          9. 12.3.2.9  Protections:Current:Latch Limit
          10. 12.3.2.10 Protections:Current:Recovery Time
       3. 12.3.3 Protections:Temperature
          1. 12.3.3.1  Protections:Temperature:Overtemperature in Charge Protection Threshold
          2. 12.3.3.2  Protections:Temperature:Overtemperature in Charge Protection Delay
          3. 12.3.3.3  Protections:Temperature:Overtemperature in Charge Protection Recovery
          4. 12.3.3.4  Protections:Temperature:Undertemperature in Charge Protection Threshold
          5. 12.3.3.5  Protections:Temperature:Undertemperature in Charge Protection Delay
          6. 12.3.3.6  Protections:Temperature:Undertemperature in Charge Protection Recovery
          7. 12.3.3.7  Protections:Temperature:Overtemperature in Discharge Protection Threshold
          8. 12.3.3.8  Protections:Temperature:Overtemperature in Discharge Protection Delay
          9. 12.3.3.9  Protections:Temperature:Overtemperature in Discharge Protection Recovery
          10. 12.3.3.10 Protections:Temperature:Undertemperature in Discharge Protection Threshold
          11. 12.3.3.11 Protections:Temperature:Undertemperature in Discharge Protection Delay
          12. 12.3.3.12 Protections:Temperature:Undertemperature in Discharge Protection Recovery
          13. 12.3.3.13 Protections:Temperature:Internal Overtemperature Protection Threshold
          14. 12.3.3.14 Protections:Temperature:Internal Overtemperature Protection Delay
          15. 12.3.3.15 Protections:Temperature:Internal Overtemperature Protection Recovery
    4. 12.4 Power
       1. 12.4.1 Power:Sleep
          1. 12.4.1.1 Power:Sleep:Sleep Current
          2. 12.4.1.2 Power:Sleep:Voltage Time
          3. 12.4.1.3 Power:Sleep:Wake Comparator Current
       2. 12.4.2 Power:Shutdown
          1. 12.4.2.1 Power:Shutdown:Shutdown Cell Voltage
          2. 12.4.2.2 Power:Shutdown:Shutdown Stack Voltage
          3. 12.4.2.3 Power:Shutdown:Shutdown Temperature
          4. 12.4.2.4 Power:Shutdown:Auto Shutdown Time
    5. 12.5 Security
       1. 12.5.1 Security:Settings
          1. 12.5.1.1 Security:Settings:Security Settings
          2. 12.5.1.2 Security:Settings:Full Access Key Step 1
          3. 12.5.1.3 Security:Settings:Full Access Key Step 2
    6. 12.6 Data Memory Summary
15. 13Revision History