SLUS810M September   2008  – August 2019 BQ24072 , BQ24073 , BQ24074 , BQ24075 , BQ24079

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
    1.     Typical Application Circuit
  4. Revision History
  5. Description (continued)
  6. Device Comparison Table
  7. Pin Configuration and Functions
    1.     Pin Functions
    2. 7.1 EN1/EN2 Settings
  8. Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Typical Characteristics
  9. Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Undervoltage Lockout (UVLO)
      2. 9.3.2 Power On
      3. 9.3.3 Overvoltage Protection (OVP)
      4. 9.3.4 Dynamic Power-Path Management
        1. 9.3.4.1 Input Source Connected (ADAPTER or USB)
          1. 9.3.4.1.1 Input DPM Mode (VIN-DPM)
          2. 9.3.4.1.2 DPPM Mode
          3. 9.3.4.1.3 Battery Supplement Mode
        2. 9.3.4.2 Input Source Not Connected
      5. 9.3.5 Battery Charging
        1. 9.3.5.1 Charge Current Translator
        2. 9.3.5.2 Adjustable Termination Threshold (ITERM Input, BQ24074)
        3. 9.3.5.3 Termination Disable (TD Input, BQ24072, BQ24073)
        4. 9.3.5.4 Battery Detection and Recharge
        5. 9.3.5.5 Battery Disconnect (SYSOFF Input, BQ24075, BQ24079)
        6. 9.3.5.6 Dynamic Charge Timers (TMR Input)
        7. 9.3.5.7 Status Indicators (PGOOD, CHG)
        8. 9.3.5.8 Thermal Regulation and Thermal Shutdown
      6. 9.3.6 Battery Pack Temperature Monitoring
    4. 9.4 Device Functional Modes
      1. 9.4.1 Sleep Mode
      2. 9.4.2 Explanation of Deglitch Times and Comparator Hysteresis
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 BQ2407x Charger Design Example
          1. 10.2.2.1.1 Termination Disable (TD) (BQ24072, BQ24073 only)
          2. 10.2.2.1.2 System ON/OFF (SYSOFF) (BQ24075 or BQ24079 only)
        2. 10.2.2.2 Calculations
          1. 10.2.2.2.1 Program the Fast Charge Current (ISET):
          2. 10.2.2.2.2 Program the Input Current Limit (ILIM)
          3. 10.2.2.2.3 Program the Termination Current Threshold (ITERM) (BQ24074 only)
          4. 10.2.2.2.4 Program 6.25-hour Fast-Charge Safety Timer (TMR)
        3. 10.2.2.3 TS Function
        4. 10.2.2.4 CHG and PGOOD
        5. 10.2.2.5 Selecting IN, OUT, and BAT Pin Capacitors
      3. 10.2.3 Application Curves
    3. 10.3 System Examples
      1. 10.3.1 Standalone Charger
      2. 10.3.2 Disconnecting the Battery From the System
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
    3. 12.3 Thermal Considerations
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Third-Party Products Disclaimer
    2. 13.2 Related Links
    3. 13.3 Receiving Notification of Documentation Updates
    4. 13.4 Community Resources
    5. 13.5 Trademarks
    6. 13.6 Electrostatic Discharge Caution
    7. 13.7 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

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

Features

  • Fully compliant USB charger
    • Selectable 100-mA and 500-mA maximum input current
    • 100-mA Maximum current limit ensures compliance to USB-IF standard
    • Input-based dynamic power management (VIN-DPM) for protection against poor USB sources
  • 28-V Input Rating with Overvoltage Protection
  • Integrated dynamic power path management (DPPM) function simultaneously and independently powers the system and charges the battery
  • Supports up to 1.5-A charge current with current monitoring output (ISET)
  • Programmable input current limit up to 1.5 A for wall adapters
  • System output tracks battery voltage (bq24072)
  • Programmable termination current (bq24074)
  • Battery disconnect function with SYSOFF input (bq24075, bq24079)
  • Programmable Pre-charge and Fast-charge safety timers
  • Reverse current, short-circuit and thermal protection
  • NTC thermistor input
  • Proprietary start-up sequence limits inrush current
  • Status indication – Charging/done, power good