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

8.2.1 Design Requirements

Table 8-1 BQ77307 Design Requirements
DESIGN PARAMETEREXAMPLE VALUE
Minimum system operating voltage17.5 V
Cell minimum operating voltage2.5 V
Series cell count7
Sense resistor1 mΩ
Thermistor in useyes
Charge voltage29.75 V
Maximum charge current6.0 A
Peak discharge current40.0 A
Configuration settingsprogrammed by TI
Protection subsystem configurationSeries FET configuration, device monitors, disables FETs upon fault, recovers autonomously
OV protection threshold4.30 V
OV protection delay375 ms
OV protection recovery hysteresis100 mV
UV protection threshold2.5 V
UV protection delay141 ms
UV protection recovery hysteresis100 mV
SCD protection threshold80 mV (corresponding to a nominal 80 A, based on a 1-mΩ sense resistor)
SCD protection delay45 to 60 µs
OCD1 protection threshold68 mV (corresponding to a nominal 68 A, based on a 1-mΩ sense resistor)
OCD1 protection delay10 ms
OCD2 protection threshold56 mV (corresponding to a nominal 56 A, based on a 1-mΩ sense resistor)
OCD2 protection delay81 ms
OCC protection threshold8 mV (corresponding to a nominal 8 A, based on a 1-mΩ sense resistor)
OCC protection delay159.2 ms
OTD protection thresholdSetting = 48 (corresponding to approximately 60°C)
OTD protection delay2 seconds
OTD protection recovery Setting = 55 (corresponding to approximately 55°C) for 2 seconds
OTC protection thresholdSetting = 72 (corresponding to approximately 45°C)
OTC protection delay2 seconds
OTC protection recovery Setting = 82 (corresponding to approximately 40°C) for 2 seconds
UTD protection thresholdSetting = 197 (corresponding to approximately –20°C)
UTD protection delay8 seconds
UTD protection recovery Setting = 174 (corresponding to approximately –10°C) for 2 seconds
UTC protection thresholdSetting = 147 (corresponding to approximately 0°C)
UTC protection delay5 seconds
UTC protection recovery Setting = 134 (corresponding to approximately 5°C) for 2 seconds
Host watchdog timeout protection delay5 seconds
ALERT pin functionalityUsed for alarm interrupt function
REGOUT LDO UsageEnabled with 3.3-V output