ZHCSE30C August   2015  – September 2016 BQ25120 , BQ25121

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     简化原理图
  4. 4 修订历史记录
  5. 5 说明 （续）
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
    1.     Pin 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
      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  Dynamic Power Path Management Mode
      10. 9.3.10 Battery Supplement Mode
      11. 9.3.11 Default Mode
      12. 9.3.12 Termination and Pre-Charge Current Programming by External Components (IPRETERM)
      13. 9.3.13 Input Current Limit Programming by External Components (ILIM)
      14. 9.3.14 Charge Current Programming by External Components (ISET)
      15. 9.3.15 Safety Timer and Watchdog Timer
      16. 9.3.16 External NTC Monitoring (TS)
      17. 9.3.17 Thermal Protection
      18. 9.3.18 Typical Application Power Dissipation
      19. 9.3.19 Status Indicators (PG and INT)
      20. 9.3.20 Chip Disable (CD)
      21. 9.3.21 Buck (PWM) Output
      22. 9.3.22 Load Switch / LDO Output and Control
      23. 9.3.23 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
        1. Table 12. Status and Ship Mode Control Register
      2. 9.6.2  Faults and Faults Mask Register
        1. Table 13. Faults and Faults Mask Register
      3. 9.6.3  TS Control and Faults Masks Register
        1. Table 14. TS Control and Faults Masks Register, Memory Location 0010
      4. 9.6.4  Fast Charge Control Register
        1. Table 15. Fast Charge Control Register
      5. 9.6.5  Termination/Pre-Charge and I2C Address Register
        1. Table 16. Termination/Pre-Charge and I2C Address Register
      6. 9.6.6  Battery Voltage Control Register
        1. Table 17. Battery Voltage Control Register
      7. 9.6.7  SYS VOUT Control Register
        1. Table 18. SYS VOUT Control Register
      8. 9.6.8  Load Switch and LDO Control Register
        1. Table 20. Load Switch and LDO Control Register
      9. 9.6.9  Push-button Control Register
        1. Table 21. Push-button Control Register
      10. 9.6.10 ILIM and Battery UVLO Control Register
        1. Table 22. ILIM and Battery UVLO Control Register, Memory Location 1001
      11. 9.6.11 Voltage Based Battery Monitor Register
        1. Table 23. Voltage Based Battery Monitor Register, Memory Location 1010
      12. 9.6.12 VIN_DPM and Timers Register
        1. Table 24. 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. 13器件和文档支持
    1. 13.1 器件支持
      1. 13.1.1 第三方产品免责声明
    2. 13.2 相关链接
    3. 13.3 接收文档更新通知
    4. 13.4 社区资源
    5. 13.5 商标
    6. 13.6 静电放电警告
    7. 13.7 Glossary
  14. 14机械、封装和可订购信息

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

9.3.7 Input Overvoltage Protection and Undervoltage Status Indication

The input overvoltage protection protects the device and downstream components connected to PMID, SYS, and BAT against damage from overvoltage on the input supply. When VIN> VOVP an OVP fault is determined to exist. During the OVP fault, the device turns the battery discharge FET on, sends a single 128-µs pulse on INT, and the FAULT bits are updated over I2C. Once the OVP fault is removed, after the deglitch time, tDGL_OVP, STAT and FAULT bits are cleared and the device returns to normal operation. The FAULT bits are not cleared until they are read in from I2C after the OVP condition no longer exists. The OVP threshold for the device is set to operate from standard USB sources.

The input under-voltage status indication is used to notify the host or other device when the input voltage falls below a desired threshold. When VIN< VUVLO, after the deglitch time tDGL_UVLO, a UVLO fault is determined to exist. During the VIN UVLO fault, the device sends a single 128-µs pulse on INT, and the STAT and FAULT bits are updated over I2C. The FAULT bits are not cleared until they are read in from I2C after the UVLO condition no longer exists.