SLUSAS0F December   2011  – July 2025 BQ2946

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Options
  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 Sense Positive Input for V1
      2. 7.3.2 Output Drive, OUT
      3. 7.3.3 Supply Input, VDD
      4. 7.3.4 Thermal Pad, PWRPAD
    4. 7.4 Device Functional Modes
      1. 7.4.1 NORMAL Mode
      2. 7.4.2 OVERVOLTAGE Mode
      3. 7.4.3 Customer Test Mode
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Application Configuration
      2. 8.1.2 29
    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 System Example
  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

7.3 Feature Description

The method of overvoltage detection is comparing the cell voltage to an OVP threshold voltage VOV. Once the cell voltage exceeds the programmed fixed value VOV, the delay timer circuit is activated. This delay (tDELAY) is fixed for 4 seconds for the BQ294602 device. When these conditions are satisfied, the OUT terminal is transitioned to a high level. This output (OUT) is released to a low condition if the cell input (V1) is below the OVP threshold minus the VHYS.

BQ2946 Timing for Overvoltage SensingFigure 7-1 Timing for Overvoltage Sensing