SLUSF65A October   2023  – January 2026 BQ25185

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Description (continued)
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Thermal Information
    4. 6.4 Recommended Operating Conditions
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
      1. 7.1.1 Battery Charging Process
        1. 7.1.1.1 Trickle Charge
        2. 7.1.1.2 Precharge
        3. 7.1.1.3 Fast Charge
        4. 7.1.1.4 ISET Pin Detection
        5. 7.1.1.5 Termination
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Input Voltage Based Dynamic Power Management (VINDPM)
      2. 7.3.2  Dynamic Power Path Management Mode (DPPM)
      3. 7.3.3  Battery Supplement Mode
      4. 7.3.4  Sleep Mode
      5. 7.3.5  SYS Regulation
      6. 7.3.6  ILIM/VSET Control
      7. 7.3.7  Protection Mechanisms
        1. 7.3.7.1 Input Overvoltage Protection
        2. 7.3.7.2 Battery Undervoltage Lockout
        3. 7.3.7.3 Battery Overcurrent Protection
        4. 7.3.7.4 System Overvoltage Protection
        5. 7.3.7.5 System Short Protection
        6. 7.3.7.6 Thermal Protection and Thermal Regulation
        7. 7.3.7.7 Safety Timer
      8. 7.3.8  Pushbutton Long Press Function
      9. 7.3.9  External NTC Monitoring (TS)
        1. 7.3.9.1 TS Biasing and Function
      10. 7.3.10 Status Pins
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Input Current and Battery Regulation Voltage - ILIM/VSET
        2. 8.2.2.2 Fast Charge Current- ISET
        3. 8.2.2.3 Recommended Passive Components
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

7.1.1.5 Termination

As the CV loop becomes dominant over the CC loop during fast charge, the charge current begins to taper and approaches the ITERM threshold. The device terminates at 10% of ICHG.

When ITERM is reached during the CV phase, the charger automatically terminates charging by disabling the BATFET (disconnecting the battery from SYS) to enter high impedance mode. If a regulation loop such as VINDPM, DPPM, or thermal regulation is active during the CV taper, termination does not occur. Charge current continues to taper due to the active regulation loop and CV, but the device does not terminate charging.

Termination only occurs when the CV loop is dominant and no other regulation loop is actively reducing the charge current. After termination, the battery FET is disabled and the device monitors the BAT pin voltage. If the BAT pin voltage drops below the battery regulation voltage (VBATREG) by the recharge threshold (VRCH), a new charge cycle is started and the safety timers are reset.

During charging, or after charging is complete, a higher SYS load is supported through supplement mode.

BQ25185 Typical Charging Profile of a BatteryFigure 7-2 Typical Charging Profile of a Battery