SLUSAS3C April 2014  – November 2017

PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Description (Continued)
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Supply Current
    6. 7.6 Power Supply Control
    7. 7.7 Low-Voltage General Purpose I/O, TS1
    8. 7.8 Power-On Reset (POR)
    9. 7.9 Internal 1.8-V LDO
    10. 7.10Current Wake Comparator
    11. 7.11Coulomb Counter
    12. 7.12ADC Digital Filter
    13. 7.13ADC Multiplexer
    14. 7.14Cell Balancing Support
    15. 7.15Internal Temperature Sensor
    16. 7.16NTC Thermistor Measurement Support
    17. 7.17High-Frequency Oscillator
    18. 7.18Low-Frequency Oscillator
    19. 7.19Voltage Reference 1
    20. 7.20Voltage Reference 2
    21. 7.21Instruction Flash
    22. 7.22Data Flash
    23. 7.23Current Protection Thresholds
    24. 7.24Current Protection Timing
    25. 7.25N-CH FET Drive (CHG, DSG)
    26. 7.26I2C Interface I/O
    27. 7.27I2C Interface Timing
    28. 7.28Typical Characteristics
  8. Detailed Description
    1. 8.1Overview
    2. 8.2Functional Block Diagram
    3. 8.3Feature Description
      1. 8.3.1 Battery Parameter Measurements
        1. 8.3.1.1bq28z610 Processor
      2. 8.3.2 Coulomb Counter (CC)
      3. 8.3.3 CC Digital Filter
      4. 8.3.4 ADC Multiplexer
      5. 8.3.5 Analog-to-Digital Converter (ADC)
      6. 8.3.6 ADC Digital Filter
      7. 8.3.7 Internal Temperature Sensor
      8. 8.3.8 External Temperature Sensor Support
      9. 8.3.9 Power Supply Control
      10. 8.3.10Power-On Reset
      11. 8.3.11Bus Communication Interface
      12. 8.3.12Cell Balancing Support
      13. 8.3.13N-Channel Protection FET Drive
      14. 8.3.14Low Frequency Oscillator
      15. 8.3.15High Frequency Oscillator
      16. 8.3.161.8-V Low Dropout Regulator
      17. 8.3.17Internal Voltage References
      18. 8.3.18Overcurrent in Discharge Protection
      19. 8.3.19Short-Circuit Current in Charge Protection
      20. 8.3.20Short-Circuit Current in Discharge 1 and 2 Protection
      21. 8.3.21Primary Protection Features
      22. 8.3.22Gas Gauging
      23. 8.3.23Charge Control Features
      24. 8.3.24Authentication
    4. 8.4Device Functional Modes
      1. 8.4.1Lifetime Logging Features
      2. 8.4.2Configuration
        1. 8.4.2.1Coulomb Counting
        2. 8.4.2.2Cell Voltage Measurements
        3. 8.4.2.3Current Measurements
        4. 8.4.2.4Auto Calibration
        5. 8.4.2.5Temperature Measurements
  9. Applications and Implementation
    1. 9.1Application Information
    2. 9.2Typical Applications
      1. 9.2.1Design Requirements (Default)
      2. 9.2.2Detailed Design Procedure
        1. 9.2.2.1Setting Design Parameters
      3. 9.2.3Calibration Process
      4. 9.2.4Gauging Data Updates
        1. 9.2.4.1Application Curve
  10. 10Power Supply Requirements
  11. 11Layout
    1. 11.1Layout Guidelines
    2. 11.2Layout Example
  12. 12Device and Documentation Support
    1. 12.1Documentation Support
    2. 12.2Receive Documentation Update Notifications
    3. 12.3Community Resources
    4. 12.4Trademarks
    5. 12.5Electrostatic Discharge Caution
    6. 12.6Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Features

  • Autonomous Battery Charging Control Using Dedicated Master Mode I2C Interface
  • Cell Balancing with Internal Bypass To Optimize Battery Health
  • High-Side Protection N-CH FET Drive Allows Serial Bus Communication During Fault Conditions
  • Programmable Protection Levels for Voltage, Current, and Temperature
  • Analog Front End with Two Independent ADCs
    • Support for Simultaneous Current and Voltage Sampling
    • High-Accuracy Coulomb Counter with Input Offset Error < 1 µV (Typical)
  • Supports Down to 1-mΩ Current Sense Resistor While Capable of 1-mA Current Measurement
  • Supports Battery Trip Point (BTP) Function for Windows® Integration
  • SHA-1 Authentication Responder for Increased Battery Pack Security
  • 400-kHz I2C Bus Communications Interface for High-Speed Programming and Data Access
  • Compact 12-Pin VSON Package (DRZ)

Applications

  • Tablet Computing
  • Portable and Wearable Health Devices
  • Portable Audio Devices
    • Wireless (Bluetooth) Speakers

Description

The Texas Instruments bq28z610 device is a highly integrated, accurate, 1-series to 2-series cell gas gauge and protection solution, enabling autonomous charger control and cell balancing.

The bq28z610 device enables autonomous charge control through Master Mode I2C broadcasts of charging current and voltage information, eliminating software overhead that is typically incurred by the system's host controller.

The bq28z610 device provides a fully integrated pack-based solution with a flash programmable custom reduced instruction-set CPU (RISC), safety protection, and authentication for 1- to 2-series cell Li-Ion and Li-Polymer battery packs.

The bq28z610 gas gauge communicates via an I2C compatible interface and combines an ultra-low-power, high-speed TI bqBMP processor, high-accuracy analog measurement capabilities, integrated flash memory, an array of peripheral and communication ports, an N-CH FET drive, and a SHA-1 Authentication transform responder into a complete, high-performance battery management solution.

Device Information(1)

PART NUMBERPACKAGEBODY SIZE (NOM)
bq28z610VSON (12) 4 mm × 2.5 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic

bq28z610 Simplified_schematic_NO_BTP.gif

Wireless (Bluetooth) Speaker Application
Block Diagram

bq28z610 BTSBD.gif