SLUSCM7 June 2017

PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  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 Power Supply Control
    7. 6.7 Low-Voltage General Purpose I/O, TS1
    8. 6.8 Power-On Reset (POR)
    9. 6.9  Internal 1.8-V LDO
    10. 6.10Current Wake Comparator
    11. 6.11Coulomb Counter
    12. 6.12ADC Digital Filter
    13. 6.13ADC Multiplexer
    14. 6.14Internal Temperature Sensor
    15. 6.15NTC Thermistor Measurement Support
    16. 6.16High-Frequency Oscillator
    17. 6.17Low-Frequency Oscillator
    18. 6.18Voltage Reference 1
    19. 6.19Voltage Reference 2
    20. 6.20Instruction Flash
    21. 6.21Data Flash
    22. 6.22Current Protection Thresholds
    23. 6.23Current Protection Timing
    24. 6.24N-CH FET Drive (CHG, DSG)
    25. 6.25I2C Interface I/O
    26. 6.26I2C Interface Timing
    27. 6.27Typical Characteristics
  7. Detailed Description
    1. 7.1Overview
    2. 7.2Functional Block Diagram
    3. 7.3Feature Description
      1. 7.3.1 Battery Parameter Measurements
        1. 7.3.1.1bq27750 Processor
      2. 7.3.2 Coulomb Counter (CC)
      3. 7.3.3 CC Digital Filter
      4. 7.3.4 ADC Multiplexer
      5. 7.3.5 Analog-to-Digital Converter (ADC)
      6. 7.3.6 ADC Digital Filter
      7. 7.3.7 Internal Temperature Sensor
      8. 7.3.8 External Temperature Sensor Support
      9. 7.3.9 Power Supply Control
      10. 7.3.10Power-On Reset
      11. 7.3.11Bus Communication Interface
      12. 7.3.12N-Channel Protection FET Drive
      13. 7.3.13Low Frequency Oscillator
      14. 7.3.14High Frequency Oscillator
      15. 7.3.151.8-V Low Dropout Regulator
      16. 7.3.16Internal Voltage References
      17. 7.3.17Overcurrent in Discharge Protection
      18. 7.3.18Short-Circuit Current in Charge Protection
      19. 7.3.19Short-Circuit Current in Discharge 1 and 2 Protection
      20. 7.3.20Primary Protection Features
      21. 7.3.21Gas Gauging
      22. 7.3.22Charge Control Features
      23. 7.3.23Authentication
    4. 7.4Device Functional Modes
      1. 7.4.1Lifetime Logging Features
      2. 7.4.2Configuration
        1. 7.4.2.1Coulomb Counting
        2. 7.4.2.2Cell Voltage Measurements
        3. 7.4.2.3Current Measurements
        4. 7.4.2.4Auto Calibration
        5. 7.4.2.5Temperature Measurements
  8. Application and Implementation
    1. 8.1Application Information
    2. 8.2Typical Applications
      1. 8.2.1Design Requirements (Default)
      2. 8.2.2Detailed Design Procedure
        1. 8.2.2.1Setting Design Parameters
      3. 8.2.3Calibration Process
      4. 8.2.4Gauging Data Updates
        1. 8.2.4.1Application Curve
  9. Power Supply Requirements
  10. 10Layout
    1. 10.1Layout Guidelines
    2. 10.2Layout Example
  11. 11Device and Documentation Support
    1. 11.1Documentation Support
    2. 11.2Trademarks
    3. 11.3Electrostatic Discharge Caution
    4. 11.4Glossary
  12. 12Mechanical, Packaging, and Orderable Information Information

Features

  • 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
  • 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
  • High-Charge Current Applications (> 5 A)

Description

The Texas Instruments bq27750 Impedance Track™ Gas Gauge and Protection Solution is a highly integrated, accurate 1-series cell gas gauge and protection solution.

The bq27750 device provides a fully integrated pack-based solution with a flash programmable custom reduced instruction-set CPU (RISC), safety protection, and authentication for 1-series cell Li-Ion and Li-Polymer battery packs.

The bq27750 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)
bq27750VSON (12) 4 mm × 2.5 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic

bq27750 Simplified_schematic.gif