ZHCSKO3B January   2020  – September 2020 BQ25611D

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
    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  Power-On-Reset (POR)
      2. 9.3.2  Device Power Up from Battery without Input Source
      3. 9.3.3  Power Up from Input Source
        1. 9.3.3.1 Power Up REGN LDO
        2. 9.3.3.2 Poor Source Qualification
        3. 9.3.3.3 Input Source Type Detection (IINDPM Threshold)
          1. 9.3.3.3.1 D+/D– Detection Sets Input Current Limit
        4. 9.3.3.4 Input Voltage Limit Threshold Setting (VINDPM Threshold)
        5. 9.3.3.5 Power Up Converter in Buck Mode
        6. 9.3.3.6 HIZ Mode with Adapter Present
      4. 9.3.4  Boost Mode Operation From Battery
      5. 9.3.5  Power Path Management
        1. 9.3.5.1 Narrow VDC Architecture
        2. 9.3.5.2 Dynamic Power Management
        3. 9.3.5.3 Supplement Mode
      6. 9.3.6  Battery Charging Management
        1. 9.3.6.1 Autonomous Charging Cycle
        2. 9.3.6.2 Battery Charging Profile
        3. 9.3.6.3 Charging Termination
        4. 9.3.6.4 Thermistor Qualification
          1. 9.3.6.4.1 JEITA Guideline Compliance During Charging Mode
          2. 9.3.6.4.2 Boost Mode Thermistor Monitor During Battery Discharge Mode
        5. 9.3.6.5 Charging Safety Timer
      7. 9.3.7  Ship Mode and QON Pin
        1. 9.3.7.1 BATFET Disable (Enter Ship Mode)
        2. 9.3.7.2 BATFET Enable (Exit Ship Mode)
        3. 9.3.7.3 BATFET Full System Reset
      8. 9.3.8  Status Outputs ( STAT, INT )
        1. 9.3.8.1 Charging Status Indicator (STAT)
        2. 9.3.8.2 Interrupt to Host ( INT)
      9. 9.3.9  Protections
        1. 9.3.9.1 Voltage and Current Monitoring in Buck Mode
          1. 9.3.9.1.1 Input Over-Voltage Protection (ACOV)
          2. 9.3.9.1.2 System Over-Voltage Protection (SYSOVP)
        2. 9.3.9.2 Voltage and Current Monitoring in Boost Mode
          1. 9.3.9.2.1 Boost Mode Over-Voltage Protection
        3. 9.3.9.3 Thermal Regulation and Thermal Shutdown
          1. 9.3.9.3.1 Thermal Protection in Buck Mode
          2. 9.3.9.3.2 Thermal Protection in Boost Mode
        4. 9.3.9.4 Battery Protection
          1. 9.3.9.4.1 Battery Over-Voltage Protection (BATOVP)
          2. 9.3.9.4.2 Battery Over-Discharge Protection
          3. 9.3.9.4.3 System Over-Current Protection
      10. 9.3.10 Serial Interface
        1. 9.3.10.1 Data Validity
        2. 9.3.10.2 START and STOP Conditions
        3. 9.3.10.3 Byte Format
        4. 9.3.10.4 Acknowledge (ACK) and Not Acknowledge (NACK)
        5. 9.3.10.5 Slave Address and Data Direction Bit
        6. 9.3.10.6 Single Read and Write
        7. 9.3.10.7 Multi-Read and Multi-Write
    4. 9.4 Device Functional Modes
      1. 9.4.1 Host Mode and Default Mode
    5. 9.5 Register Maps
  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 Inductor Selection
        2. 10.2.2.2 Input Capacitor and Resistor
        3. 10.2.2.3 Output Capacitor
    3. 10.3 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
    2. 13.2 Documentation Support
      1. 13.2.1 Related Documentation
    3. 13.3 Receiving Notification of Documentation Updates
    4. 13.4 Support Resources
    5. 13.5 Trademarks
    6. 13.6 Electrostatic Discharge Caution
    7. 13.7 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

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9.3.7.3 BATFET Full System Reset

The BATFET functions as a load switch between battery and system when input source is not plugged–in. When BATFET_RST_EN=1 and BATFET_DIS=0, BATFET full system reset function is enabled. By changing the state of BATFET from on to off, systems connected to SYS can be effectively forced to have a power-on-reset. The QON pin supports push-button interface to reset system power without host by changing the state of BATFET. Internally, it is pulled up to the VQON voltage through a 200-kΩ resistor.

When the QON pin is driven to logic low for tQON_RST, BATFET reset process starts. The BATFET is turned off for tBATFET_RST and then it is re-enabled to reset system power. This function can be disabled by setting BATFET_RST_EN bit to 0.

BATFET full system reset functions either with or without adapter present. If BATFET_RST_WVBUS=1, the system reset function starts after tQON_RST when QON pin is pushed to LOW. Once the reset process starts, the device first goes into HIZ mode to turn off the converter, and then power cycles BATFET. If BATFET_RST_WVBUS=0, the system reset function doesn't start till tQON_RST after QON pin is pushed to LOW and adapter is removed.

After BATFET full system reset is complete, the device will power up again if EN_HIZ is not set to 1 before the system reset.

GUID-443556C8-DC87-4979-9314-0BBE5CBC4F33-low.gif Figure 9-7 QON Timing