SLUSCS3K October   2017  – July 2024 BQ2980 , BQ2982

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
      1. 7.1.1 Device Configurability
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Overvoltage (OV) Status
      2. 7.3.2 Undervoltage (UV) Status
      3. 7.3.3 Overcurrent in Charge (OCC) Status
      4. 7.3.4 Overcurrent in Discharge (OCD) and Short Circuit in Discharge (SCD) Status
      5. 7.3.5 Overtemperature (OT) Status
      6. 7.3.6 Charge and Discharge Driver
      7. 7.3.7 CTR for FET Override and Device Shutdown
      8. 7.3.8 CTR for PTC Connection
      9. 7.3.9 ZVCHG (0-V Charging)
    4. 7.4 Device Functional Modes
      1. 7.4.1 Power Modes
        1. 7.4.1.1 Power-On-Reset (POR)
        2. 7.4.1.2 NORMAL Mode
        3. 7.4.1.3 FAULT Mode
        4. 7.4.1.4 SHUTDOWN Mode
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Test Circuits for Device Evaluation
      2. 8.1.2 Test Circuit Diagrams
      3. 8.1.3 Using CTR as FET Driver On/Off Control
    2. 8.2 Typical Applications
      1. 8.2.1 BQ298x Configuration 1: System-Controlled Reset/Shutdown Function
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Selection of Power FET
        4. 8.2.1.4 Application Curves
      2. 8.2.2 BQ298x Configuration 2: CTR Function Disabled
      3. 8.2.3 BQ298x Configuration 3: PTC Thermistor Protection
  10. 9 Power Supply Recommendations
  11. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Third-Party Products Disclaimer
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  13. 12Revision History
  14. 13Mechanical, Packaging, and Orderable Information

Package Options

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

7.3.1 Overvoltage (OV) Status

The device detects an OV fault when VBAT > VOVP (OV threshold) during charging. If this condition exists for longer than the OV delay (tOVP), the CHG output is driven to VFETOFF to turn off the CHG FET.

The OV status is released and the CHG output rises to HIGH, that is, VCHG = VDD × (1 + AFETON), if one of the following conditions occurs:

  • When VBAT is < (VOVP – VOVP_HYS) and the charger is removed or
  • When VBAT is < VOVP and a discharge load is detected.

The device detects the charger is removed if (VPACK – VBAT) < 100-mv typical. To detect if a load is attached, the device checks if (VBAT – VPACK) > 400-mv typical.