ZHCSNA1A april   2020  – february 2021 BQ25968

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Revision History
  6. 5 说明（续）
  7. 6 Device Comparison Table
  8. 7 Pin Configuration and Functions
  9. 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
  10. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1  Charging System
      2. 9.3.2  Battery Charging Profile
      3. 9.3.3  Control State Diagram for System Implementation
      4. 9.3.4  Device Power Up
      5. 9.3.5  Switched Cap Function
        1. 9.3.5.1 Theory of Operation
      6. 9.3.6  Charging Start-Up
      7. 9.3.7  Integrated 16-Bit ADC for Monitoring and Smart Adapter Feedback
      8. 9.3.8  Device Internal Thermal Shutdown, TSBUS, and TSBAT Temperature Monitoring
      9. 9.3.9  INT Pin, STAT, FLAG, and MASK Registers
      10. 9.3.10 CDRVH and CDRVL_ADDRMS Functions
      11. 9.3.11 Parallel Operation Using Master and Slave Modes
    4. 9.4 Device Functional Modes
      1. 9.4.1 Device Modes and Protection Status
        1. 9.4.1.1 Input Overvoltage, Overcurrent, Undercurrent and Short-Circuit Protection
        2. 9.4.1.2 Battery Overvoltage and Overcurrent Protection
        3. 9.4.1.3 Cycle-by-Cycle Current Limit
    5. 9.5 Programming
      1. 9.5.1 F/S Mode Protocol
    6. 9.6 Register Maps
      1. 9.6.1 Customer Registers
  11. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Standalone Application Information (for use with switching charger)
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
        3. 10.2.1.3 Application Curves
      2. 10.2.2 Parallel BQ25968 for Higher Power Applications
        1. 10.2.2.1 Design Requirements
        2. 10.2.2.2 Detailed Design Procedure
        3. 10.2.2.3 Application Curve
  12. 11Power Supply Recommendations
  13. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  14. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 第三方产品免责声明
      2. 13.1.2 Device Nomenclature
    2. 13.2 Documentation Support
      1. 13.2.1 Related Documentation
    3. 13.3 接收文档更新通知
    4. 13.4 支持资源
    5. 13.5 Trademarks
    6. 13.6 静电放电警告
    7. 13.7 术语表
  15. 14Mechanical, Packaging, and Orderable Information

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9.4.1 Device Modes and Protection Status

Table 9-3 shows the features and modes of the device depending on the conditions of the device.

Table 9-3 Device Modes and Protection Status
FUNCTIONS AVAILABLESTATE
BATT-ONLY (VAC < VACpres)VAC > VACpresentVAC > VACpresentVAC > VACpresentVAC > VACpresent
(REGARDLESS OF VOUTpres)CHARGE DISABLEDCHARGE DISABLEDDURING CHARGE SOFTSTARTCHARGING
(REGARDLESS OF ADC)(ADC NOT ENABLED)ADC ENABLED(REGARDLESS OF ADC)(REGARDLESS OF ADC)
I2C allowedXXXXX
Allow user ADC requestXXXXX
VAC FET gate driveXXXX
VAC OVP protectionXXXX
TS_BUS ALMXXXX
TS_BAT ALMXXXX
DIE TMP ALMXXXX
VBUS OVP ALMXX
VBAT OVP ALMXX
VBAT OCP ALMXX
VOUT_OVPXXX
VBUS OCP ALMXX
VBUS UCP ALMX
VBUS In-range (slow UVP/OVP)XXX
TS_BUS FLTXXXX
TS_BAT FLTXXXX
DIE TMP FLTXXXX
VBUS OVP FLTXX
VBAT OVP FLTXX
VBAT OCP FLTXX
VBUS OCP FLTXX
VBUS UCP FLTX
Cycle by Cycle Current LimitXX

Tripping any of these protection faults will cause QB to be off. Masking the fault or alarm does NOT disable the protection, but only keeps an INT from being triggered by the event. Disabling the fault or alarm will hold that stat and flag bits in reset, and also prevent an interrupt from occurring.