SLUSF60 December   2023 BQ77307

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  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 BQ77307
    5. 6.5  Supply Current
    6. 6.6  Digital I/O
    7. 6.7  REGOUT LDO
    8. 6.8  Voltage References
    9. 6.9  Current Detector
    10. 6.10 Thermistor Pullup Resistor
    11. 6.11 Hardware Overtemperature Detector
    12. 6.12 Internal Oscillator
    13. 6.13 Charge and Discharge FET Drivers
    14. 6.14 Protection Subsystem
    15. 6.15 Timing Requirements - I2C Interface, 100kHz Mode
    16. 6.16 Timing Requirements - I2C Interface, 400kHz Mode
    17. 6.17 Timing Diagram
    18. 6.18 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Device Configuration
      1. 7.3.1 Commands and Subcommands
      2. 7.3.2 Configuration Using OTP or Registers
      3. 7.3.3 Device Security
    4. 7.4 Device Hardware Features
      1. 7.4.1  Voltage Protection Subsystem
      2. 7.4.2  Current Protection Subsystem
      3. 7.4.3  Unused VC Pins
      4. 7.4.4  Internal Temperature Protection
      5. 7.4.5  Thermistor Temperature Protections
      6. 7.4.6  Protection FET Drivers
      7. 7.4.7  Voltage References
      8. 7.4.8  Multiplexer
      9. 7.4.9  LDOs
      10. 7.4.10 Standalone Versus Host Interface
      11. 7.4.11 ALERT Pin Operation
      12. 7.4.12 Low Frequency Oscillator
      13. 7.4.13 I2C Serial Communications Interface
    5. 7.5 Protection Subsystem
      1. 7.5.1 Protections Overview
      2. 7.5.2 Primary Protections
      3. 7.5.3 Cell Open Wire Protection
      4. 7.5.4 Diagnostic Checks
    6. 7.6 Device Power Modes
      1. 7.6.1 Overview of Power Modes
      2. 7.6.2 NORMAL Mode
      3. 7.6.3 SHUTDOWN Mode
      4. 7.6.4 CONFIG_UPDATE Mode
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Performance Plot
      4. 8.2.4 Random Cell Connection Support
      5. 8.2.5 Startup Timing
      6. 8.2.6 FET Driver Turn-Off
      7. 8.2.7 Usage of Unused Pins
  10. 9 Power Supply Recommendations
  11. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  13. 12Revision History
  14. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.4.1 Voltage Protection Subsystem

The BQ77307 device integrates a voltage protection subsystem which is multiplexed between differential cell voltages, an internal temperature sensor, the TS pin, and for diagnostic purposes also evaluates the internal 1.8-V LDO voltage and the VSS rail. The BQ77307 device supports cell voltage protections for individual cells arranged in a series configuration, ranging from 2-series cells to 7-series cells. Each differential cell voltage is evaluated between two adjacent cell input pins, such as VC1-VC0, VC2-VC1, and so on. The cell voltage protections support a recommended differential voltage range from -0.2 V to 5.5 V.