ZHCSNF1 February   2021 BQ25960

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Description (continued)
  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  Charging System
      2. 9.3.2  Battery Charging Profile
      3. 9.3.3  Device Power Up
      4. 9.3.4  Device HIZ State
      5. 9.3.5  Dual Input Bi-Directional Power Path Management
        1. 9.3.5.1 ACDRV Turn-On Condition
        2. 9.3.5.2 Single Input from VAC to VBUS without ACFET-RBFET
        3. 9.3.5.3 Single Input with ACFET1
        4. 9.3.5.4 Dual Input with ACFET1-RBFET1
        5. 9.3.5.5 Dual Input with ACFET1-RBFET1 and ACFET2-RBFET2
        6. 9.3.5.6 OTG and Reverse TX Mode Operation
      6. 9.3.6  Bypass Mode Operation
      7. 9.3.7  Charging Start-Up
      8. 9.3.8  Adapter Removal
      9. 9.3.9  Integrated 16-Bit ADC for Monitoring and Smart Adapter Feedback
      10. 9.3.10 Device Modes and Protection Status
        1. 9.3.10.1 Input Overvoltage, Overcurrent, Undercurrent, Reverse-Current and Short-Circuit Protection
        2. 9.3.10.2 Battery Overvoltage and Overcurrent Protection
        3. 9.3.10.3 IC Internal Thermal Shutdown, TSBUS, and TSBAT Temperature Monitoring
      11. 9.3.11 INT Pin, STAT, FLAG, and MASK Registers
      12. 9.3.12 Dual Charger Operation Using Primary and Secondary Modes
      13. 9.3.13 CDRVH and CDRVL_ADDRMS Functions
    4. 9.4 Programming
      1. 9.4.1 F/S Mode Protocol
    5. 9.5 Register Maps
      1. 9.5.1 I2C Registers
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Standalone Application Information (for use with main charger)
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
        3. 10.2.1.3 Application 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 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
  14. 14Mechanical, Packaging, and Orderable Information

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9.3.10 Device Modes and Protection Status

Table 9-5 shows the features and modes of the device depending on the conditions of the device.

Table 9-5 Device Modes and Protection Status
FUNCTIONS AVAILABLESTATE
BATTERY ONLY VAC1/VAC2/ VBUS NOT PRESENTINPUT PRESENTINPUT PRESENTINPUT PRESENT
CHARGE DISABLEDDURING SOFTSTART TIMERAFTER SOFTSTART TIMER
I2C allowedXXXX
ADCXXXX
ACDRV gate driveXXX
VACOVPXXX
TDIE_ALMXXX
TDIE_TFLXXX
BUSOVP_ALMXX
BUSOCP_ALMXX
BATOVP_ALMXX
BATOCP_ALMXX
BATUCP_ALMXX
VOUTOVPXXX
TSBUS_FLTXXX
TSBAT_ FLTXXX
BUSOVPXXX
BATOVPXXX
BATOCPXX
BUSOCPXX
BUSUCPX
BUSRCPXX

Tripping any of these protections causes QB to be off and converter stops switching. 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 protection other than BUSUCP holds that STAT and FLAG bits in reset, and also prevents an interrupt from occurring. Disable BUSUCP protection still sets STAT and FLAT bits and sends interrupt to alert host but keeps converter running when triggered.

When any OVP, OCP, RCP or overtemperature fault event is triggered, the CHG_EN bit is set to ‘0’ to disable charging, and the charging start-up sequence must be followed to begin charging again.