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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9.3.4 Boost Mode Operation From Battery

The device supports boost converter operation to deliver power from the battery to other portable devices through a USB port. The output voltage is regulated at 5-V (programmable 4.6/4.75/5.0/5.15 V) and output current is up to 1.2 A (programmable 0.5 A/1.2 A ) with constant current regulation. The user needs to have at least 350 mV between VBAT and boost mode regulation voltage (VBST) to power up boost mode reliably. For example, BOOSTV[1:0] setting is recommended to be 4.75 V or higher if the battery voltage is 4.4 V.

The boost operation is enabled if the conditions below are valid:

  1. Register setting: BATFET_DIS = 0, CHG_COFNIG = 0 and BST_CONFIG = 1
  2. BAT above VBST_BAT set by MIN_VBAT_SEL bit,
  3. VBUS less than VBAT + VSLEEP (in sleep mode) before converter starts.
  4. Voltage at TS (thermistor) pin, as a percentage of VREGN, is within acceptable range (VBHOT_RISE% < VTS% < VBCOLD_FALL%)
  5. After 30-ms delay from boost mode enable .

During boost mode, the status register VBUS_STAT bits is set to 111 .

The converter supports PFM operation at light load in boost mode. The PFM_DIS bit can be used to disable PFM operation in boost configuration.