ZHCS292H september   2009  – february 2021 BQ24040 , BQ24041 , BQ24045

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Revision History
  6. 5 Device Comparison
  7. 6 Pin Configuration and Functions
  8. 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 Timing Requirements
    7. 7.7 Typical Operational Characteristics (Protection Circuits Waveforms)
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Power-Down or Undervoltage Lockout (UVLO)
      2. 8.3.2 Power-up
      3. 8.3.3 Sleep Mode
      4. 8.3.4 New Charge Cycle
      5. 8.3.5 Overvoltage-Protection (OVP) – Continuously Monitored
      6. 8.3.6 Power Good Indication ( PG)
      7. 8.3.7 CHG Terminal Indication
    4. 8.4 Device Functional Modes
      1. 8.4.1  CHG and PG LED Pull-up Source
      2. 8.4.2  Auto Start-up (BQ24041)
      3. 8.4.3  IN-DPM (VIN-DPM or IN-DPM)
      4. 8.4.4  OUT
      5. 8.4.5  ISET
      6. 8.4.6  PRE_TERM – Pre-Charge and Termination Programmable Threshold, BQ24040/5
      7. 8.4.7  ISET2
      8. 8.4.8  TS (BQ24040/5)
      9. 8.4.9  Termination and Timer Disable Mode (TTDM) - TS Terminal High
      10. 8.4.10 Timers, BQ24040 and BQ24045 only
      11. 8.4.11 Termination
      12. 8.4.12 Battery Detect Routine
      13. 8.4.13 Refresh Threshold
      14. 8.4.14 Starting a Charge on a Full Battery
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Typical Application: BQ24040 and BQ24045
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Calculations
            1. 9.2.1.2.1.1 Program the Fast Charge Current, ISET:
            2. 9.2.1.2.1.2 Program the Termination Current Threshold, ITERM:
            3. 9.2.1.2.1.3 TS Function (BQ24040)
            4. 9.2.1.2.1.4 CHG and PG
          2. 9.2.1.2.2 Selecting In and Out Terminal Capacitors
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Typical Application Circuit: BQ24041, with ASI and ASO
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
        3. 9.2.2.3 Application Curves
  11. 10Power Supply Recommendations
  12. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Considerations
      1. 11.3.1 Leakage Current Effects on Battery Capacity
  13. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 第三方产品免责声明
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 接收文档更新通知
    4. 12.4 支持资源
    5. 12.5 Trademarks
    6. 12.6 静电放电警告
    7. 12.7 术语表
  14. 13Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

3 说明

BQ2404x 系列器件是高度集成的锂离子和锂聚合物线性充电器器件，面向空间受限的便携式应用。该器件由 USB 端口或交流适配器供电。高输入电压范围和输入过压保护功能支持低成本、未稳压的适配器。

BQ2404x 具有为电池充电的单电源输出。如果在 10 小时的安全定时器期间内平均系统负载无法让电池充满电，则可以使系统负载与电池并联。

电池充电经历以下三个阶段：调节，恒定电流和恒定电压。在所有充电阶段，内部控制环路都会监控 IC 结温，当其超过内部温度阈值时，它会减少充电电流。

充电器功率级和充电电流检测功能均完全集成。该充电器具高精度电流和电压调节环路、充电状态显示和充电终止功能。预充电电流和终止电流阈值通过 BQ24040 和 BQ24045 上的外部电阻进行编程。快速充电电流值也可通过一个外部电阻进行编程。

器件信息
器件型号(1)封装封装尺寸（标称值）
BQ24040WSON (10)2.00mm x 2.00mm
BQ24041
BQ24045
(1) 如需了解所有可用封装，请参阅数据表末尾的可订购产品附录。
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