SLUSEQ7A October   2023  – June 2024 BQ77205

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 DC Characteristics
    6. 6.6 Timing Requirements
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Voltage Fault Detection
      2. 7.3.2 Open Wire Fault Detection
      3. 7.3.3 Oscillator Health Check
      4. 7.3.4 Sense Positive Input for Vx
      5. 7.3.5 Output Drive, OUT
      6. 7.3.6 The LATCH Function
      7. 7.3.7 Supply Input, VDD
    4. 7.4 Device Functional Modes
      1. 7.4.1 NORMAL Mode
      2. 7.4.2 FAULT Mode
      3. 7.4.3 Customer Test Mode
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Design Requirements
      2. 8.1.2 Detailed Design Procedure
        1. 8.1.2.1 Cell Connection Sequence
    2. 8.2 Systems 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 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

Package Options

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

7.1 Overview

The BQ77205 family of devices provides a range of voltage and temperature monitoring including overvoltage (OVP), open-wire (OW) protection for Li-ion battery pack systems. Each cell is monitored independently for overvoltage, and open-wire conditions. An internal delay timer is initiated upon detection of an overvoltage, open-wire, condition. Upon expiration of the delay timer, the respective output is triggered into its active state (either high or low depending on the configuration). The overvoltage triggers the OUT pin if a fault is detected. If an open-wire fault is detected, then the OUT is triggered.

For quicker production-line testing, the BQ77205 device provides a Customer Test Mode (CTM) with greatly reduced delay time.