SLUUCO9A April   2023  – November 2023 BQ28Z620

1.   1
2.   Read This First
   1.     About This Manual
   2.     Notational Conventions
   3.     Trademarks
   4.     Glossary
3. 1 Introduction
4. 2 BQ28Z620 Change List
   1. 2.1 Auto Ship Time
   2. 2.2 Safety Cell UnderVoltage Permanent Fail
   3. 2.3 OCV Reading Before FETs Enabled
   4. 2.4 SOH Calculation Based on the Battery Specification
   5. 2.5 Sync Filtered and Unfiltered Data when OCV Taken
   6. 2.6 Additional Changes
5. 3 Protections
   1. 3.1  Introduction
   2. 3.2  Cell Undervoltage Protection
   3. 3.3  Cell Overvoltage Protection
   4. 3.4  Overcurrent in Charge Protection
   5. 3.5  Overcurrent in Discharge Protection
   6. 3.6  Hardware-Based Protection
      1. 3.6.1 Overload in Discharge Protection
      2. 3.6.2 Short Circuit in Charge Protection
      3. 3.6.3 Short Circuit in Discharge Protection
   7. 3.7  Temperature Protections
   8. 3.8  Overtemperature in Charge Protection
   9. 3.9  Overtemperature in Discharge Protection
   10. 3.10 Undertemperature in Charge Protection
   11. 3.11 Undertemperature in Discharge Protection
   12. 3.12 Precharge Timeout Protection
   13. 3.13 Fast Charge Timeout Protection
6. 4 Permanent Fail
   1. 4.1 Introduction
   2. 4.2 Safety Cell Undervoltage Permanent Fail
      1. 4.2.1 SUV Check Option
   3. 4.3 Safety Cell Overvoltage Permanent Fail
   4. 4.4 Voltage Imbalance at Rest Permanent Fail
   5. 4.5 Voltage Imbalance Active Permanent Fail
   6. 4.6 Charge FET Permanent Failure
      1. 4.6.1 Description
      2. 4.6.2 Feature Enable/Disable
   7. 4.7 Discharge FET Permanent Failure
      1. 4.7.1 Description
      2. 4.7.2 Feature Enable/Disable
   8. 4.8 Instruction Flash (IF) Checksum Permanent Fail
   9. 4.9 Data Flash (DF) Permanent Fail
7. 5 Advanced Charge Algorithm
   1. 5.1  Introduction
   2. 5.2  Charge Temperature Ranges
   3. 5.3  Voltage Range
   4. 5.4  Charging Current
   5. 5.5  Charging Voltage
   6. 5.6  Valid Charge Termination
   7. 5.7  Charge and Discharge Alarms
   8. 5.8  Terminate Charge and Discharge Alarms
   9. 5.9  Precharge
   10. 5.10 Maintenance Charge
   11. 5.11 BROADCAST Mode
   12. 5.12 Charge Disable and Discharge Disable
   13. 5.13 Charge Inhibit
   14. 5.14 Charge Suspend
8. 6 Power Modes
   1. 6.1 Introduction
   2. 6.2 NORMAL Mode
   3. 6.3 SLEEP Mode
      1. 6.3.1 Device Sleep
      2. 6.3.2 IN SYSTEM SLEEP Mode
      3. 6.3.3 MACSubcmd() MAC Sleep
      4. 6.3.4 Wake Function
   4. 6.4 SHUTDOWN Mode
      1. 6.4.1 Voltage Based Shutdown
      2. 6.4.2 MACSubcmd() MAC Shutdown
      3. 6.4.3 Time Based Shutdown
      4. 6.4.4 Emergency FET Shutdown
         1. 6.4.4.1 Exiting Emergency FET Shutdown
9. 7 Power Modes
   1. 7.1 Introduction
   2. 7.2 NORMAL Mode
   3. 7.3 SLEEP Mode
      1. 7.3.1 Device Sleep
      2. 7.3.2 IN SYSTEM SLEEP Mode
      3. 7.3.3 MACSubcmd() MAC Sleep
      4. 7.3.4 Wake Function
   4. 7.4 SHUTDOWN Mode
      1. 7.4.1 Voltage Based Shutdown
      2. 7.4.2 MACSubcmd() MAC Shutdown
      3. 7.4.3 Time Based Shutdown
      4. 7.4.4 Emergency FET Shutdown
         1. 7.4.4.1 Exiting Emergency FET Shutdown
10. 8 Gauging
    1. 8.1 Introduction
    2. 8.2 Impedance Track Configuration
    3. 8.3 Gas Gauge Modes
    4. 8.4 QMax and Ra
       1. 8.4.1 QMax Initial Values
       2. 8.4.2 QMax Update Conditions
       3. 8.4.3 Fast QMax Update Conditions
       4. 8.4.4 QMax and Fast QMax Update Boundary Check
       5. 8.4.5 Ra Table Initial Values
       6. 8.4.6 Ra Table Update Conditions
    5. 8.5 FullChargeCapacity (FCC), RemainingCapacity (RemCap), and RelativeStateOfCharge (RSOC)
    6. 8.6 Impedance Track (IT) Configuration Options
    7. 8.7 State-of-Health (SOH)
11. 9 Cell Balancing
    1. 9.1 Introduction
    2. 9.2 Cell Balancing Setup
    3. 9.3 Cell Balancing Operation
12. 10Lifetime Data Collection
    1. 10.1 Description
13. 11Device Security
    1. 11.1 Description
    2. 11.2 SHA-1 Description
    3. 11.3 HMAC Description
    4. 11.4 Authentication
    5. 11.5 Security Modes
       1. 11.5.1 SEALING and UNSEALING Data Flash
       2. 11.5.2 SEALED to UNSEALED
       3. 11.5.3 UNSEALED to FULL ACCESS
14. 12Manufacture Production
    1. 12.1 Manufacture Testing
    2. 12.2 Calibration
15. 13Calibration
    1. 13.1 Cell Voltage Calibration
    2. 13.2 VC2 (BAT) Voltage Calibration
    3. 13.3 PACK Voltage Calibration
    4. 13.4 Current Calibration
       1. 13.4.1 CC Offset Calibration
       2. 13.4.2 Board Offset Calibration
       3. 13.4.3 CC Gain/Capacity Gain Calibration
    5. 13.5 Temperature Calibration
       1. 13.5.1 Internal Temperature Sensor Calibration
       2. 13.5.2 TS1 Calibration
16. 14I2C Commands
    1. 14.1 Standard Data Commands
       1. 14.1.1  0x00/01 ManufacturerAccess() andControlStatus()
       2. 14.1.2  0x02/03 AtRate()
       3. 14.1.3  0x04/05 AtRateTimeToEmpty()
       4. 14.1.4  0x06/07 Temperature()
       5. 14.1.5  0x08/09 Voltage()
       6. 14.1.6  0x0A/0B BatteryStatus()
       7. 14.1.7  0x0C/0D Current()
       8. 14.1.8  0x0E/0F MaxError()
       9. 14.1.9  0x10/11 RemainingCapacity()
       10. 14.1.10 0x12/13 FullChargeCapacity()
       11. 14.1.11 0x14/15 AverageCurrent()
       12. 14.1.12 0x16/17 AverageTimeToEmpty()
       13. 14.1.13 0x18/19 AverageTimeToFull()
       14. 14.1.14 0x1A/1B StandbyCurrent()
       15. 14.1.15 0x1C/1D StandbyTimeToEmpty()
       16. 14.1.16 0x1E/1F MaxLoadCurrent()
       17. 14.1.17 0x20/21 MaxLoadTimeToEmpty()
       18. 14.1.18 0x22/23 AveragePower()
       19. 14.1.19 0x28/29 InternalTemperature()
       20. 14.1.20 0x2A/2B CycleCount()
       21. 14.1.21 0x2C/2D RelativeStateOfCharge()
       22. 14.1.22 0x2E/2F State-of-Health (SOH)
       23. 14.1.23 0x30/31 ChargingVoltage()
       24. 14.1.24 0x32/33 ChargingCurrent()
       25. 14.1.25 0x3C/3D DesignCapacity()
       26. 14.1.26 0x3E/3F MACSubcmd()
       27. 14.1.27 0x40/0x5F MACData()
       28. 14.1.28 0x60 MACDataChecksum()
       29. 14.1.29 0x61 MACDataLength()
    2. 14.2 Manufacturer Access Control (MAC)
       1. 14.2.1  MACSubcmd() 0x0001 Device Type
       2. 14.2.2  MACSubcmd() 0x0002 Firmware Version
       3. 14.2.3  MACSubcmd() 0x0003 Hardware Version
       4. 14.2.4  MACSubcmd() 0x0004 Instruction Flash Signature
       5. 14.2.5  MACSubcmd() 0x0005 Static DF Signature
       6. 14.2.6  MACSubcmd() 0x0006 Chemical ID
       7. 14.2.7  MACSubcmd() 0x0007 Pre_MACWrite
       8. 14.2.8  MACSubcmd() 0x0008 Static Chem DF Signature
       9. 14.2.9  MACSubcmd() 0x0009 All DF Signature
       10. 14.2.10 MACSubcmd() 0x0010 SHUTDOWN Mode
       11. 14.2.11 MACSubcmd() 0x0011 SLEEP Mode
       12. 14.2.12 MACSubcmd() 0x0012 Device Reset
       13. 14.2.13 MACSubcmd() 0x001F CHG FET
       14. 14.2.14 MACSubcmd() 0x0020 DSG FET
       15. 14.2.15 MACSubcmd() 0x0021 Gauging
       16. 14.2.16 MACSubcmd() 0x0022 FET Control
       17. 14.2.17 MACSubcmd() 0x0023 Lifetime Data Collection
       18. 14.2.18 MACSubcmd() 0x0024 Permanent Failure
       19. 14.2.19 MACSubcmd() 0x0028 Lifetime Data Reset
       20. 14.2.20 MACSubcmd() 0x0029 Permanent Fail Data Reset
       21. 14.2.21 MACSubcmd() 0x002D CALIBRATION Mode
       22. 14.2.22 MACSubcmd() 0x0030 Seal Device
       23. 14.2.23 MACSubcmd() 0x0035 Security Keys
       24. 14.2.24 MACSubcmd() 0x0037 Authentication Key
       25. 14.2.25 MACSubcmd() 0x0041 Device Reset
       26. 14.2.26 MACSubcmd() 0x004A Device Name
       27. 14.2.27 MACSubcmd() 0x004B Device Chem
       28. 14.2.28 MACSubcmd() 0x004C Manufacturer Name
       29. 14.2.29 MACSubcmd() 0x004D Manufacture Date
       30. 14.2.30 MACSubcmd() 0x004E Serial Number
       31. 14.2.31 MACSubcmd() 0x0050 SafetyAlert
       32. 14.2.32 MACSubcmd() 0x0051 SafetyStatus
       33. 14.2.33 MACSubcmd() 0x0052 PFAlert
       34. 14.2.34 MACSubcmd() 0x0053 PFStatus
       35. 14.2.35 MACSubcmd() 0x0054 OperationStatus
       36. 14.2.36 MACSubcmd() 0x0055 ChargingStatus
       37. 14.2.37 MACSubcmd() 0x0056 GaugingStatus
       38. 14.2.38 MACSubcmd() 0x0057 ManufacturingStatus
       39. 14.2.39 MACSubcmd() 0x0058 AFE Register
       40. 14.2.40 MACSubcmd() 0x0060 Lifetime Data Block 1
       41. 14.2.41 MACSubcmd() 0x0070 ManufacturerInfo
       42. 14.2.42 MACSubcmd() 0x0071 DAStatus1
       43. 14.2.43 MACSubcmd() 0x0072 DAStatus2
       44. 14.2.44 MACSubcmd() 0x0073 ITStatus1
       45. 14.2.45 MACSubcmd() 0x0074 ITStatus2
       46. 14.2.46 MACSubcmd() 0x0075 ITStatus3
       47. 14.2.47 MACSubcmd() 0x0076 CB Status
       48. 14.2.48 MACSubcmd() 0x0077 State-of-Health
       49. 14.2.49 MACSubcmd() 0x0F00 ROM Mode
       50. 14.2.50 Data Flash Access() 0x4000–0x5FFF
       51. 14.2.51 MACSubcmd() 0xF080 Exit Calibration Output Mode
       52. 14.2.52 MACSubcmd() 0xF081 Output CC and ADC for Calibration
       53. 14.2.53 MACSubcmd() 0xF082 Output Shorted CC and ADC for Calibration
17. 15Data Flash Values
    1. 15.1  Data Formats
       1. 15.1.1 Unsigned Integer
       2. 15.1.2 Integer
       3. 15.1.3 Floating Point
       4. 15.1.4 Hex
       5. 15.1.5 String
    2. 15.2  Calibration
       1. 15.2.1 Voltage
       2. 15.2.2 Current
       3. 15.2.3 Current Offset
       4. 15.2.4 Current Deadband
       5. 15.2.5 Temperature
       6. 15.2.6 Internal Temp Model
       7. 15.2.7 Cell Temp Model
    3. 15.3  Settings
       1. 15.3.1 Configuration
       2. 15.3.2 Charger
       3. 15.3.3 Protection
       4. 15.3.4 Permanent Failure
       5. 15.3.5 AFE
       6. 15.3.6 Manufacturing
    4. 15.4  Advanced Charging Algorithms
       1. 15.4.1  Temperature Ranges
       2. 15.4.2  Low Temp Charging
       3. 15.4.3  Standard Temp Charging
       4. 15.4.4  High Temp Charging
       5. 15.4.5  Rec Temp Charging
       6. 15.4.6  Pre-Charging
       7. 15.4.7  Maintenance Charging
       8. 15.4.8  Voltage Range
       9. 15.4.9  Termination Config
       10. 15.4.10 Cell Balancing Config
    5. 15.5  Power
       1. 15.5.1 Power
       2. 15.5.2 Shutdown
       3. 15.5.3 Sleep
       4. 15.5.4 Ship
       5. 15.5.5 PMPDRV
    6. 15.6  Gas Gauging
       1. 15.6.1  Standby
       2. 15.6.2  Max Load
       3. 15.6.3  Current Thresholds
       4. 15.6.4  Design
       5. 15.6.5  Cycle
       6. 15.6.6  FD
       7. 15.6.7  FC
       8. 15.6.8  TDA
       9. 15.6.9  TCA
       10. 15.6.10 State
       11. 15.6.11 IT Config
       12. 15.6.12 Condition Flag
       13. 15.6.13 SOH
       14. 15.6.14 Max Error
    7. 15.7  System Data
       1. 15.7.1 Manufacturer Data
       2. 15.7.2 Integrity
    8. 15.8  Configuration
       1. 15.8.1 Data
    9. 15.9  Lifetimes
       1. 15.9.1 Voltage
       2. 15.9.2 Current
       3. 15.9.3 Temperature
       4. 15.9.4 Safety Events
       5. 15.9.5 Power Events
    10. 15.10 Protections
        1. 15.10.1  CUV—Cell Undervoltage
        2. 15.10.2  COV—Cell Overvoltage
        3. 15.10.3  OCC—Overcurrent In Charge
        4. 15.10.4  OCD—Overcurrent In Discharge
        5. 15.10.5  AOLD—AFE Over Load In Discharge
        6. 15.10.6  ASCC—AFE Short Circuit in Charge
        7. 15.10.7  ASCD—AFE Short Circuit in Discharge
        8. 15.10.8  OTC—Overtemperature in Charge
        9. 15.10.9  OTD—Overtemperature in Discharge
        10. 15.10.10 UTC—Under Temperature in Charge
        11. 15.10.11 UTD—Under Temperature in Discharge
        12. 15.10.12 PTO—PRECHARGE Mode Time Out
        13. 15.10.13 CTO—FAST CHARGE Mode Time Out
    11. 15.11 Permanent Fail
        1. 15.11.1 SUV—Safety Cell Undervoltage
        2. 15.11.2 SOV—Safety Cell Overvoltage
        3. 15.11.3 VIMR—Voltage Imbalance at Rest
        4. 15.11.4 VIMA—Voltage Imbalance Active
    12. 15.12 PF Status
        1. 15.12.1 Device Status Data
        2. 15.12.2 Device Voltage Data
        3. 15.12.3 Device Current Data
        4. 15.12.4 Device Temperature Data
        5. 15.12.5 Device Gauging Data
        6. 15.12.6 AFE Registers
    13. 15.13 RA Table
        1. 15.13.1 R_a0
        2. 15.13.2 R_a1
        3. 15.13.3 R_a0x
        4. 15.13.4 R_a1x
18. 16Data Flash Summary
    1. 16.1 Data Flash Table
19.   A AFE Control Register
20.   B AFE Threshold and Delay Settings
    1.     B.1 Overload in Discharge Protection (AOLD)
    2.     B.2 Short Circuit in Charge (ASCC)
    3.     B.3 Short Circuit in Discharge (ASCD1 and ASCD2)
21.   C Revision History