SLUSF53C August   2024  – June 2025 BQ2969

PRODMIX  

  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
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Pin Details
        1. 7.3.1.1 Input Sense Voltage, Vx
        2. 7.3.1.2 Output Drive, OUT
        3. 7.3.1.3 Supply Input, VDD
        4. 7.3.1.4 Regulated Supply Output, REG
      2. 7.3.2 Overvoltage Sensing for OUT
      3. 7.3.3 Regulator Output Voltage
    4. 7.4 Device Functional Modes
      1. 7.4.1 NORMAL Mode
      2. 7.4.2 OVERVOLTAGE Mode
      3. 7.4.3 UNDERVOLTAGE Mode
      4. 7.4.4 CUSTOMER TEST MODE
  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
      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
    1. 11.1 Tape and Reel Information

8.2 Typical Application

Figure 8-1 shows a simplified application schematic using the BQ2969 together with the associated passive components and external NFET to flow a high-side fuse.

BQ2969 BQ2969 4-Series Cell Typical Implementation (Simplified Schematic) Figure 8-1 BQ2969 4-Series Cell Typical Implementation (Simplified Schematic)

A full schematic of a basic circuit based on the BQ2969 for a 4-series battery pack evaluation module is shown below. Figure 8-8 and Figure 8-9 show the board layout for this design.

BQ2969 BQ2969 4-Series Cell Schematic Diagram - Protector and Fuse Blow Circuitry Figure 8-2 BQ2969 4-Series Cell Schematic Diagram - Protector and Fuse Blow Circuitry
BQ2969 BQ2969 4-Series Cell Schematic Diagram - Cell Simulator Circuitry Figure 8-3 BQ2969 4-Series Cell Schematic Diagram - Cell Simulator Circuitry