SLUSBU5V November   2013  – September 2025 BQ2961 , BQ2962

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
    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 Regulated 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
  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 Device Support
      1. 11.1.1 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

7.1 Overview

The BQ2961 and BQ2962 devices are second-level overvoltage (OV) protectors with a regulated output. Each cell is monitored independently by comparing the actual cell voltage to an overvoltage threshold VOV. The overvoltage threshold is preprogrammed at the factory with a range between 3.85V to 4.65V.

The regulated output is enabled unless any of the cell voltages fall below the VUVREG threshold. This threshold is preprogrammed at the factory with a range between 2V to 2.8 (3.5V for future BQ2962 options).

Table 7-1 Programmable Parameters
OVERVOLTAGE RANGE (V)OVERVOLTAGE DELAY (s)UNDERVOLTAGE RANGE (V)REGULATOR (V)
3.85 to 4.6 in 50mV steps3, 4, 5.5, 6.52.0 to 2.8 (3.5 for future BQ2962 options) in 50-mV steps1.8, 2.5, 3.3 (BQ2961)
3.0, 3.15, 3.3 (BQ2962)