SLUSFA4B June   2023  – February 2024 BQ25628E

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Description (continued)
  6. 5 Device Comparison
  7. 6 Pin Configuration and Functions
  8. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Power-On-Reset (POR)
      2. 8.3.2 Device Power Up from Battery
      3. 8.3.3 Device Power Up from Input Source
        1. 8.3.3.1 REGN LDO Power Up
        2. 8.3.3.2 Poor Source Qualification
        3. 8.3.3.3 ILIM Pin
        4. 8.3.3.4 Input Voltage Limit Threshold Setting (VINDPM Threshold)
        5. 8.3.3.5 Converter Power-Up
      4. 8.3.4 Power Path Management
        1. 8.3.4.1 Narrow VDC Architecture
        2. 8.3.4.2 Dynamic Power Management
        3. 8.3.4.3 High Impedance Mode
      5. 8.3.5 Battery Charging Management
        1. 8.3.5.1 Autonomous Charging Cycle
        2. 8.3.5.2 Battery Charging Profile
        3. 8.3.5.3 Charging Termination
        4. 8.3.5.4 Thermistor Qualification
          1. 8.3.5.4.1 Advanced Temperature Profile in Charge Mode
          2. 8.3.5.4.2 TS Pin Thermistor Configuration
          3. 8.3.5.4.3 JEITA Charge Rate Scaling
          4. 8.3.5.4.4 TS_BIAS Pin
        5. 8.3.5.5 Charging Safety Timers
      6. 8.3.6 Integrated 12-Bit ADC for Monitoring
      7. 8.3.7 Status Outputs ( PG, STAT, INT)
        1. 8.3.7.1 PG Pin Power Good Indicator
        2. 8.3.7.2 Interrupts and Status, Flag and Mask Bits
        3. 8.3.7.3 Charging Status Indicator (STAT)
        4. 8.3.7.4 Interrupt to Host ( INT)
      8. 8.3.8 BATFET Control
        1. 8.3.8.1 Shutdown Mode
        2. 8.3.8.2 Ship Mode
        3. 8.3.8.3 System Power Reset
      9. 8.3.9 Protections
        1. 8.3.9.1 Voltage and Current Monitoring in Battery Only and HIZ Modes
          1. 8.3.9.1.1 Battery Undervoltage Lockout
          2. 8.3.9.1.2 Battery Overcurrent Protection
        2. 8.3.9.2 Voltage and Current Monitoring in Buck Mode
          1. 8.3.9.2.1 Input Overvoltage
          2. 8.3.9.2.2 System Overvoltage Protection (SYSOVP)
          3. 8.3.9.2.3 Forward Converter Cycle-by-Cycle Current Limit
          4. 8.3.9.2.4 System Short
          5. 8.3.9.2.5 Battery Overvoltage Protection (BATOVP)
          6. 8.3.9.2.6 Sleep and Poor Source Comparators
        3. 8.3.9.3 Thermal Regulation and Thermal Shutdown
          1. 8.3.9.3.1 Thermal Protection in Buck Mode
          2. 8.3.9.3.2 Thermal Protection in Battery-Only Mode
    4. 8.4 Device Functional Modes
      1. 8.4.1 Host Mode and Default Mode
      2. 8.4.2 Register Bit Reset
    5. 8.5 Programming
      1. 8.5.1 Serial Interface
        1. 8.5.1.1 Data Validity
        2. 8.5.1.2 START and STOP Conditions
        3. 8.5.1.3 Byte Format
        4. 8.5.1.4 Acknowledge (ACK) and Not Acknowledge (NACK)
        5. 8.5.1.5 Target Address and Data Direction Bit
        6. 8.5.1.6 Single Write and Read
        7. 8.5.1.7 Multi-Write and Multi-Read
    6. 8.6 Register Maps
      1. 8.6.1 Register Programming
      2. 8.6.2 BQ25628E Registers
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Inductor Selection
        2. 9.2.2.2 Input Capacitor
        3. 9.2.2.3 Output Capacitor
      3. 9.2.3 Application Curves
  11. 10Power Supply Recommendations
  12. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  13. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Support Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  14. 13Revision History
  15. 14Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.3.3.4 Input Voltage Limit Threshold Setting (VINDPM Threshold)

The BQ25628E supports a wide range of input voltage limit (3.8 V – 16.8 V). Its POR default VINDPM threshold is set at 4.6 V. The BQ25628E also supports dynamic VINDPM tracking, which tracks the battery voltage to ensure a sufficient margin between input and battery voltages for proper operation of the buck converter. This function is enabled via the VINDPM_BAT_TRACK register bit. When enabled, the actual input voltage limit is the higher of the VINDPM register or VINDPM_BAT_TRACK (VBAT + 400-mV typical offset.)