SLUS893B March   2010  – June 2015

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Battery Voltage Regulation
      2. 8.3.2  Battery Current Regulation
      3. 8.3.3  Precharge
      4. 8.3.4  Charge Termination, Recharge, and Safety Timer
      5. 8.3.5  Power Up
      6. 8.3.6  Enable and Disable Charging
      7. 8.3.7  Automatic Internal Soft-Start Charger Current
      8. 8.3.8  Converter Operation
      9. 8.3.9  Synchronous and Nonsynchronous Operation
      10. 8.3.10 Cycle-by-Cycle Charge Undercurrent
      11. 8.3.11 Input Overvoltage Protection (ACOV)
      12. 8.3.12 Input Undervoltage Lockout (UVLO)
      13. 8.3.13 Battery Overvoltage Protection
      14. 8.3.14 Cycle-by-Cycle Charge Overcurrent Protection
      15. 8.3.15 Thermal Shutdown Protection
      16. 8.3.16 Temperature Qualification
      17. 8.3.17 Timer Fault Recovery
      18. 8.3.18 PG Output
      19. 8.3.19 CE (Charge Enable)
      20. 8.3.20 Charge Status Outputs
      21. 8.3.21 Battery Detection
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Inductor Selection
        2. 9.2.2.2 Input Capacitor
        3. 9.2.2.3 Output Capacitor
        4. 9.2.2.4 Power MOSFET Selection
        5. 9.2.2.5 Input Filter Design
        6. 9.2.2.6 Inductor, Capacitor, and Sense Resistor Selection Guidelines
        7. 9.2.2.7 Maximum Output Capacitance
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

10 Power Supply Recommendations

For proper operation of bq24620, VCC must be from 5 V to 28 V. To begin charging, VCC must be higher than SRN by at least 500 mV (otherwise, the device will be in sleep mode). TI recommends an input voltage of at least 1.5 V to 2 V higher than the battery voltage, taking into consideration the DC losses in the high-side FET (Rdson), inductor (DCR), the input diode drop, and battery sense resistor (between SRP and SRN). Power limit for the input supply must be greater than the maximum power required for battery charging.