SLUUBT4B June   2018  – June 2025 BQ40Z80

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Ordering Information
    4. 1.4 BQ40Z80 and BQ771807 Circuit Module Performance Specification Summary
  6. 2Hardware
    1. 2.1 BQ40Z80EVM Quick Start Guide
      1. 2.1.1 Items Needed for EVM Setup and Evaluation
      2. 2.1.2 Software Installation
      3. 2.1.3 EVM Connections
      4. 2.1.4 Update Firmware
    2. 2.2 Battery Management Studio
      1. 2.2.1 Registers Screen
      2. 2.2.2 Setting Programmable bq40z80 Options
      3. 2.2.3 Calibration Screen
        1. 2.2.3.1 Voltage Calibration
        2. 2.2.3.2 Temperature Calibration
        3. 2.2.3.3 Current Calibration
      4. 2.2.4 Chemistry Screen
      5. 2.2.5 Firmware Screen
        1. 2.2.5.1 Programming the Flash Memory
        2. 2.2.5.2 Exporting the Flash Memory
      6. 2.2.6 Advanced Comm SMB Screen
  7. 3Hardware Design Files
    1. 3.1 bq40z80EVM Circuit Module Schematic
      1. 3.1.1 Precharge
      2. 3.1.2 Predischarge
      3. 3.1.3 LED Control
      4. 3.1.4 Emergency Shutdown
      5. 3.1.5 Testing Fuse-Blowing Circuit
    2. 3.2 Circuit Module Physical Layouts
      1. 3.2.1 Board Layout
      2. 3.2.2 bq40z80RevA Schematic
    3. 3.3 bq40z80EVM Bill of Materials
  8. 4Additional Information
    1. 4.1 Trademarks
  9. 5Related Documentation from Texas Instruments
  10. 6Revision History

3.1.5 Testing Fuse-Blowing Circuit

To prevent the loss of board functionality during the fuse-blowing test, the actual chemical fuse is not provided on the EVM. FET Q9 drives the FUSE test point low if a fuse-blow condition occurs. FUSE is attached to an open drain FET, so a pull-up resistor is required to check whether the FUSE pulls low. A FUSEPIN test point is attached to the gate of Q9; so, monitoring FUSEPIN can be used to test this condition without adding a pull-up resistor. Fuse placement on the application board is shown in the bq40z80 data sheet. A chemical fuse can also be soldered to the EVM for in-system testing. When using the chemical fuse, remove the shorting resistor R1 from the board.