SLUUCD5 January   2023 BQ27427

1.   Read This First
   1. 1.1 Notational conventions used in this document:
   2. 1.2 Trademarks
   3. 1.3 Glossary
2. 1General Description
3. 2Functional Description
   1. 2.1 Fuel Gauging
   2. 2.2 Temperature Measurement
   3. 2.3 Current Measurement
   4. 2.4 Operating Modes
      1. 2.4.1 SHUTDOWN Mode
      2. 2.4.2 POR and INITIALIZATION Modes
      3. 2.4.3 CONFIG UPDATE Mode
      4. 2.4.4 NORMAL Mode
      5. 2.4.5 SLEEP Mode
   5. 2.5 Pin Descriptions
      1. 2.5.1 GPOUT Pin
      2. 2.5.2 Battery Detection (BIN)
4. 3Communications
   1. 3.1 I2C Interface
   2. 3.2 I2C Time Out
   3. 3.3 I2C Command Waiting Time
   4. 3.4 I2C Clock Stretching
5. 4Application Examples
   1. 4.1 Data Memory Parameter Update Example
   2. 4.2 Chemistry Profile Change Example
6. 5Standard Commands
   1. 5.1  Control(): 0x00 and 0x01
      1. 5.1.1  CONTROL_STATUS: 0x0000
      2. 5.1.2  DEVICE_TYPE: 0x0001
      3. 5.1.3  FW_VERSION: 0x0002
      4. 5.1.4  DM_CODE: 0x0004
      5. 5.1.5  PREV_MACWRITE: 0x0007
      6. 5.1.6  CHEM_ID: 0x0008
      7. 5.1.7  BAT_INSERT: 0x000C
      8. 5.1.8  BAT_REMOVE: 0x000D
      9. 5.1.9  SET_CFGUPDATE: 0x0013
      10. 5.1.10 SMOOTH_SYNC: 0x0019
      11. 5.1.11 SHUTDOWN_ENABLE: 0x001B
      12. 5.1.12 SHUTDOWN: 0x001C
      13. 5.1.13 SEALED: 0x0020
      14. 5.1.14 PULSE_SOC_INT: 0x0023
      15. 5.1.15 CHEM_A:/B/C 0x0030/0x0031/0x0032
      16. 5.1.16 RESET: 0x0041
      17. 5.1.17 SOFT_RESET: 0x0042
   2. 5.2  Temperature(): 0x02 and 0x03
   3. 5.3  Voltage(): 0x04 and 0x05
   4. 5.4  Flags(): 0x06 and 0x07
   5. 5.5  NominalAvailableCapacity(): 0x08 and 0x09
   6. 5.6  FullAvailableCapacity(): 0x0A and 0x0B
   7. 5.7  RemainingCapacity(): 0x0C and 0x0D
   8. 5.8  FullChargeCapacity(): 0x0E and 0x0F
   9. 5.9  AverageCurrent(): 0x10 and 0x11
   10. 5.10 AveragePower(): 0x18 and 0x19
   11. 5.11 StateOfCharge(): 0x1C and 0x1D
   12. 5.12 InternalTemperature(): 0x1E and 0x1F
   13. 5.13 RemainingCapacityUnfiltered(): 0x28 and 0x29
   14. 5.14 RemainingCapacityFiltered(): 0x2A and 0x2B
   15. 5.15 FullChargeCapacityUnfiltered(): 0x2C and 0x2D
   16. 5.16 FullChargeCapacityFiltered(): 0x2E and 0x2F
   17. 5.17 StateOfChargeUnfiltered(): 0x30 and 0x31
7. 6Extended Data Commands
   1. 6.1 DataClass(): 0x3E
   2. 6.2 DataBlock(): 0x3F
   3. 6.3 BlockData(): 0x40 Through 0x5F
   4. 6.4 BlockDataChecksum(): 0x60
   5. 6.5 BlockDataControl(): 0x61
   6. 6.6 Reserved—0x62 Through 0x7F
8. 7Data Memory
   1. 7.1 Data Memory Interface
      1. 7.1.1 Accessing the Data Memory
      2. 7.1.2 Access Modes
      3. 7.1.3 SEALING and UNSEALING Data Memory Access
   2. 7.2 Data Types Summary
   3. 7.3 Data Flash Summary
   4. 7.4 Data Memory Parameter Descriptions
      1. 7.4.1 Configuration Class
         1. 7.4.1.1 Safety Subclass
            1. 7.4.1.1.1 Over-Temperature Threshold, Under-Temperature Threshold, Temperature Hysteresis
         2. 7.4.1.2 Charge Termination Subclass
            1. 7.4.1.2.1 Terminate Charge Alarm Set %, Terminate Charge Alarm Clear %
            2. 7.4.1.2.2 Full Charge Set %, Full Charge Clear %
            3. 7.4.1.2.3 DOD at EOC Delta Temperature
         3. 7.4.1.3 Discharge Subclass
            1. 7.4.1.3.1 State-of-Charge 1 Set Threshold, State-of-Charge 1 Clear Threshold
            2. 7.4.1.3.2 State-of-Charge Final Set Threshold, State-of-Charge Final Clear Threshold
         4. 7.4.1.4 Registers
            1. 7.4.1.4.1 Operation Configuration (OpConfig) Register
            2. 7.4.1.4.2 Operation Configuration B (OpConfigB) Register
            3. 7.4.1.4.3 Operation Configuration C (OpConfigC) Register
            4. 7.4.1.4.4 Operation Configuration D (OpConfigD) Register
      2. 7.4.2 Gas (Fuel) Gauging Class
         1. 7.4.2.1 IT Cfg Subclass
            1. 7.4.2.1.1  OCV Wait Time
            2. 7.4.2.1.2  Ra Filter
            3. 7.4.2.1.3  Resistance Update Voltage Drop
            4. 7.4.2.1.4  Samples to Wake
            5. 7.4.2.1.5  Qmax Max Time
            6. 7.4.2.1.6  Fast Qmax Start DOD%, Fast Qmax Start Voltage Delta, Fast Qmax Current Threshold
            7. 7.4.2.1.7  Fast Qmax End DOD%, Fast Qmax Minimum Data Points
            8. 7.4.2.1.8  Maximum Qmax Change
            9. 7.4.2.1.9  Qmax Maximum Delta %
            10. 7.4.2.1.10 Maximum % Default Qmax
            11. 7.4.2.1.11 Qmax Filter
            12. 7.4.2.1.12 Simulation ResRelax Time (ResRelax Time)
            13. 7.4.2.1.13 User-Defined Rate-Current
            14. 7.4.2.1.14 User-Defined Rate-Power
            15. 7.4.2.1.15 Maximum Simulation Rate, Minimum Simulation Rate
            16. 7.4.2.1.16 Ra Max Delta
            17. 7.4.2.1.17 Minimum Delta Voltage, Maximum Delta Voltage
            18. 7.4.2.1.18 DeltaV Maximum Delta Voltage
            19. 7.4.2.1.19 Terminate Voltage Valid Time
            20. 7.4.2.1.20 Trace Resistance
            21. 7.4.2.1.21 Downstream Resistance
            22. 7.4.2.1.22 Predict Ambient Time
            23. 7.4.2.1.23 Design Energy Scale
            24. 7.4.2.1.24 Fast Scale Load Select
            25. 7.4.2.1.25 Chg DOD Correction Start SOC
            26. 7.4.2.1.26 Chg DOD Correction Taper Ratio
         2. 7.4.2.2 Current Thresholds Subclass
            1. 7.4.2.2.1 Discharge and Charge Detection Threshold, Quit Current and Relax Time, Discharge and Charge Relax Time
            2. 7.4.2.2.2 Max IR Correct
         3. 7.4.2.3 State Subclass
            1. 7.4.2.3.1  Qmax Cell 0
            2. 7.4.2.3.2  Update Status
            3. 7.4.2.3.3  Reserve Capacity (mAh)
            4. 7.4.2.3.4  Load Select, Load Mode
            5. 7.4.2.3.5  Design Capacity, Design Energy, Default Design Capacity
            6. 7.4.2.3.6  Terminate Voltage
            7. 7.4.2.3.7  Thermal Rise Factor (T Rise)
            8. 7.4.2.3.8  Thermal Time Constant (T Time Constant)
            9. 7.4.2.3.9  SOC Interrupt Delta
            10. 7.4.2.3.10 Taper Rate, Taper Voltage
            11. 7.4.2.3.11 Sleep Current
            12. 7.4.2.3.12 Voltage at Charge Termination
            13. 7.4.2.3.13 Average Current Last Run
            14. 7.4.2.3.14 Average Power Last Run
            15. 7.4.2.3.15 Delta Voltage
      3. 7.4.3 Ra Table Class
         1. 7.4.3.1 R_a RAM Subclass
      4. 7.4.4 Chemistry Class
         1. 7.4.4.1 Chem Data Subclass
            1. 7.4.4.1.1 Q Invalid Max V and Q Invalid Min V
            2. 7.4.4.1.2 V at Chg Term
            3. 7.4.4.1.3 Taper Voltage
      5. 7.4.5 Calibration Class
         1. 7.4.5.1 Data Subclass
            1. 7.4.5.1.1 Board Offset
            2. 7.4.5.1.2 Internal Temperature Offset and External Temperature Offset
            3. 7.4.5.1.3 Pack Voltage Offset
            4. 7.4.5.1.4 Ext a Coef and Ext b Coef
         2. 7.4.5.2 CC Cal Subclass
            1. 7.4.5.2.1 CC Cal Temp
         3. 7.4.5.3 Current Subclass
            1. 7.4.5.3.1 Deadband
      6. 7.4.6 Security Class
         1. 7.4.6.1 Codes Subclass
            1. 7.4.6.1.1 Sealed to Unsealed
9. 8Updating BQ27427 Configuration Parameters
   1. 8.1 Gauge Mode FlashStream (gm.fs) Files
   2. 8.2 Write Command
   3. 8.3 Read and Compare Command
   4. 8.4 Wait Command
   5. 8.5 CONFIG UPDATE Mode
10. 9Revision History