TIDUF44 January   2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Highlighted Products
      1. 2.2.1 BQ76907
      2. 2.2.2 BQ76905
      3. 2.2.3 BQ77207
      4. 2.2.4 MSPM0L1106
      5. 2.2.5 TCAN1042
      6. 2.2.6 TPSM365R6V5
      7. 2.2.7 TLV704
      8. 2.2.8 TMP61
  9. 3System Design Theory
    1. 3.1 Primary Protection Design
    2. 3.2 Secondary Protection
    3. 3.3 Other Circuit Design
  10. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Requirements
    2. 4.2 Software Requirements
    3. 4.3 Test Setup
    4. 4.4 Test Results
      1. 4.4.1 Cell Voltage Accuracy
      2. 4.4.2 Pack Current Accuracy
      3. 4.4.3 Protection
      4. 4.4.4 Cell Balancing
      5. 4.4.5 Working Modes Transition
      6. 4.4.6 Thermal Performance
  11. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
    2. 5.2 Tools and Software
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  12. 6About the Author

BQ76907

The BQ76907 product is a highly-integrated, accurate battery monitor and protector for 2-series to 7-series Li-Ion, Li-Polymer, and LiFePO4 battery packs. A high-accuracy voltage, current, and temperature measurement provides data for host-based algorithms and control. A feature-rich and highly configurable protection subsystem provides a wide set of protections which can be triggered and recovered completely autonomously by the device or under full control of a host processor. Integrated FET drivers drive low-side charge and discharge protection NFETs. A programmable LDO is included for external system use, with voltage programmable to 1.8 V, 2.5 V, 3.0 V, 3.3 V, or 5.0 V, capable of providing up to 20 mA. The BQ76907 device includes one-time-programmable (OTP) memory which TI programs to configure default device operation settings, for systems where a host processor is not available to configure the device. A 400-kHz I2C communication interface and ALERT interrupt output enable communication with a host processor. The device includes support for one external thermistor as well as an internal die temperature measurement.