SLUSFF9 November   2023 BQ27Z558

PRODUCTION DATA  

1.   1
2. 1 Features
3. 2 Applications
4. 3 Description
5. 4 Description (continued)
6. 5 Pin Configuration and Functions
7. 6 Specifications
   1. 6.1  Absolute Maximum Ratings
   2. 6.2  ESD Ratings
   3. 6.3  Recommended Operating Conditions
   4. 6.4  Thermal Information
   5. 6.5  Supply Current
   6. 6.6  Internal 1.8-V LDO (REG18)
   7. 6.7  I/O (PULS, INT)
   8. 6.8  Chip Enable (CE)
   9. 6.9  Internal Temperature Sensor
   10. 6.10 NTC Thermistor Measurement Support
   11. 6.11 Coulomb Counter (CC)
   12. 6.12 Analog Digital Converter (ADC)
   13. 6.13 Internal Oscillator Specifications
   14. 6.14 Voltage Reference1 (REF1)
   15. 6.15 Voltage Reference2 (REF2)
   16. 6.16 Flash Memory
   17. 6.17 I2C I/O
   18. 6.18 I2C Timing — 100 kHz
   19. 6.19 I2C Timing — 400 kHz
   20. 6.20 HDQ Timing
   21. 6.21 Typical Characteristics
8. 7 Detailed Description
   1. 7.1 Overview
   2. 7.2 Functional Block Diagram
   3. 7.3 Feature Description
      1. 7.3.1  BQ27Z558 Processor
      2. 7.3.2  Battery Parameter Measurements
         1. 7.3.2.1 Coulomb Counter (CC)
         2. 7.3.2.2 CC Digital Filter
         3. 7.3.2.3 ADC Multiplexer
         4. 7.3.2.4 Analog-to-Digital Converter (ADC)
         5. 7.3.2.5 Internal Temperature Sensor
         6. 7.3.2.6 External Temperature Sensor Support
      3. 7.3.3  Power Supply Control
      4. 7.3.4  Bus Communication Interface
      5. 7.3.5  Low Frequency Oscillator
      6. 7.3.6  High Frequency Oscillator
      7. 7.3.7  1.8-V Low Dropout Regulator
      8. 7.3.8  Internal Voltage References
      9. 7.3.9  Gas Gauging
      10. 7.3.10 Charge Control Features
      11. 7.3.11 Authentication
   4. 7.4 Device Functional Modes
      1. 7.4.1 Lifetime Logging Features
      2. 7.4.2 Configuration
         1. 7.4.2.1 Coulomb Counting
         2. 7.4.2.2 Cell Voltage Measurements
         3. 7.4.2.3 Auto Calibration
         4. 7.4.2.4 Temperature Measurements
9. 8 Applications and Implementation
   1. 8.1 Application Information
   2. 8.2 Typical Applications
      1. 8.2.1 Design Requirements (Default)
      2. 8.2.2 Detailed Design Procedure
         1. 8.2.2.1 Changing Design Parameters
      3. 8.2.3 Calibration Process
      4. 8.2.4 Gauging Data Updates
         1. 8.2.4.1 Application Curve
   3. 8.3 Power Supply Recommendations
   4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
10. 9 Device and Documentation Support
    1. 9.1 Device Support
       1. 9.1.1 Third-Party Products Disclaimer
    2. 9.2 Documentation Support
       1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
11. 10Revision History
12. 11Mechanical, Packaging, and Orderable Information

BQ27Z558 Impedance Track? Battery Gas Gauge Solution
for 1-Series Cell Li-Ion Battery Packs, with 1.2-V IO Support