ZHCSJX0A June   2019  – January 2021 BQ25125

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 说明（续）
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
  8. 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 Timing Requirements
    7. 8.7 Typical Characteristics
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1  Ship Mode
        1. 9.3.1.1 Ship Mode Entry and Exit
      2. 9.3.2  High Impedance Mode
      3. 9.3.3  Active Battery Only Connected
      4. 9.3.4  Voltage Based Battery Monitor
      5. 9.3.5  Sleep Mode
      6. 9.3.6  Input Voltage Based Dynamic Power Management (VIN(DPM))
      7. 9.3.7  Input Overvoltage Protection and Undervoltage Status Indication
      8. 9.3.8  Battery Charging Process and Charge Profile
      9. 9.3.9  Battery Supplement Mode
      10. 9.3.10 Default Mode
      11. 9.3.11 Termination and Pre-Charge Current Programming by External Components (IPRETERM)
      12. 9.3.12 Input Current Limit Programming by External Components (ILIM)
      13. 9.3.13 Charge Current Programming by External Components (ISET)
      14. 9.3.14 Safety Timer
      15. 9.3.15 External NTC Monitoring (TS)
      16. 9.3.16 Thermal Protection
      17. 9.3.17 Typical Application Power Dissipation
      18. 9.3.18 Status Indicators ( PG and INT)
      19. 9.3.19 Chip Disable ( CD)
      20. 9.3.20 Buck (PWM) Output
      21. 9.3.21 Load Switch / LDO Output and Control
      22. 9.3.22 Manual Reset Timer and Reset Output ( MR and RESET)
    4. 9.4 Device Functional Modes
    5. 9.5 Programming
      1. 9.5.1 Serial Interface Description
      2. 9.5.2 F/S Mode Protocol
    6. 9.6 Register Maps
      1. 9.6.1  Status and Ship Mode Control Register
      2. 9.6.2  Faults and Faults Mask Register
      3. 9.6.3  TS Control and Faults Masks Register
      4. 9.6.4  Fast Charge Control Register
      5. 9.6.5  Termination/Pre-Charge Register
      6. 9.6.6  Battery Voltage Control Register
      7. 9.6.7  SYS VOUT Control Register
      8. 9.6.8  Load Switch and LDO Control Register
      9. 9.6.9  Push-button Control Register
      10. 9.6.10 ILIM and Battery UVLO Control Register
      11. 9.6.11 Voltage Based Battery Monitor Register
      12. 9.6.12 VIN_DPM and Timers Register
  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 Default Settings
        2. 10.2.2.2 Choose the Correct Inductance and Capacitance
        3. 10.2.2.3 Calculations
          1. 10.2.2.3.1 Program the Fast Charge Current (ISET)
          2. 10.2.2.3.2 Program the Input Current Limit (ILIM)
          3. 10.2.2.3.3 Program the Pre-charge/termination Threshold (IPRETERM)
          4. 10.2.2.3.4 TS Resistors (TS)
      3. 10.2.3 Application Performance Curves
        1. 10.2.3.1 Charger Curves
        2. 10.2.3.2 SYS Output Curves
        3. 10.2.3.3 Load Switch and LDO Curves
        4. 10.2.3.4 LS/LDO Output Curves
        5. 10.2.3.5 Timing Waveforms Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 第三方产品免责声明
    2. 13.2 接收文档更新通知
    3. 13.3 支持资源
    4. 13.4 Trademarks
    5. 13.5 Electrostatic Discharge Caution
    6. 13.6 术语表
  14. 14Mechanical, Packaging, and Orderable Information

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订购信息

5 说明（续）

运行和关断期间的低静态电流有助于延长电池寿命。该器件支持 5mA 至 300mA 的充电电流。输入电流限制、充电电流、降压转换器输出电压、LDO 输出电压等参数均可通过 I2C 接口进行编程。

该器件采用标准锂离子充电曲线分三个阶段对电池进行充电：预充电、恒流和恒压该器件包含一个基于电压的 JEITA 兼容电池组热敏电阻监视输入 (TS)，可监视电池温度并自动更改充电参数，从而防止电池在超出其安全温度范围的温度下充电。该充电器针对 5V USB 输入进行了优化，可承受 20V 线路瞬态电压。降压转换器由输入或电池供电。当处于仅电池模式时，器件可由电压最高达 4.65V 的电池供电运行。

利用可配置负载开关，器件可断开与不常用器件的连接，从而优化系统。计时器手动复位功能可实现多种优化唤醒和复位的不同配置选项。基于电压的简单监视器为主机提供电池电量信息，电量范围为已编程 V(BATREG) 的 60% 至 100%（单位增量为 2%）。