SLUUCY9 November   2023 BQ76905

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Before You Begin
    2. 2.2 Required Equipment
    3. 2.3 BQ76905 Circuit Module Use
      1. 2.3.1 Cell Simulator
      2. 2.3.2 Evaluating with Load Current
      3. 2.3.3 Evaluating Charge and Discharge Currents
      4. 2.3.4 Evaluating with Simulated Current
      5. 2.3.5 Reducing the Cell Count
      6. 2.3.6 Connecting Cells
      7. 2.3.7 Connecting to a Host
      8. 2.3.8 Hardware Configuration
        1. 2.3.8.1 Configuration Jumpers
      9. 2.3.9 Configuration Register Programming
  9. 3Quick Start Guide
  10. 4Software
    1. 4.1 Battery Management Studio Software
      1. 4.1.1 System Requirements
      2. 4.1.2 Installing BQStudio
      3. 4.1.3 BQ76905 bqz File Installation
      4. 4.1.4 BQStudio Operation and Registers View
      5. 4.1.5 Commands
      6. 4.1.6 Data Memory
        1. 4.1.6.1 Entering, Saving, and Loading Configuration
      7. 4.1.7 Command Sequences
  11. 5Hardware Design Files
    1. 5.1 Schematic
    2. 5.2 Board Layout
    3. 5.3 Bill of Materials
  12. 6Additional Information
    1.     Trademarks

3 Quick Start Guide

The BQ76905 registers must be configured to enable most protections, select the monitored cells, and enable the protection FETs on the EVM. This section does not describe current protection settings.

These steps describe quick connection of the BQ76905 EVM to demonstrate operation of the AFE portion of the EVM. For more detailed descriptions, refer to other sections of the user's guide.

Refer to Figure 4-1 for the following steps.

  1. Download the BQSTUDIO software from the tool folder link www.ti.com/tool/BQSTUDIO or search from www.ti.com.
  2. Install the BQStudio software (see Section 4.1.2).
  3. Install the cell simulator shunts.
  4. VC4A to VC4B and VC3A to VC3B are shorted directly at the pins. However, CELL6 to CELL 5 and CELL4 to CELL 3 must also be shorted at the cell-side for proper circuit module functionality.
  5. Position shunts for the I2C to MCU connection.
  6. Attach the on-board communication adapter USB connector to the PC using USB cable.
  7. Connect a 0-V DC power supply capable of 250 mA minimum between the “BAT-” and "7P" terminals and adjust to approximately 15 V.
  8. Start the BQStudio software. If there is proper communication, then the GUI opens with a register display. Click on the Scan button to enable repeated update of the display. The power supply can be adjusted within range of the part to observe voltage changes in the GUI register display.
  9. Select the Data Memory button in the BQStudio window.
  10. Select the Settings button. Set the Enabled Protections A CUV bit.
  11. Select the Protections button. Set the Cell Undervoltage Protection Threshold to 2800.
  12. In the Commands panel click on the FET_ENABLE button.
  13. In the Registers view click on the Scan icon so that the registers update periodically. Observe that the CHG and DSG bits in the Battery Status register are on. Measure the PACK voltage on the board if desired.
  14. Adjust the supply voltage to approximately 12.5 V. In the registers view observe that the DSG bit goes off.
  15. Make other adjustments as desired for evaluation. See other sections of this user guide for details of operation.
  16. When complete with this quick start demonstration, exit the BQStudio software and turn off the power supply.

Refer to other sections of this user's guide for additional details.

GUID-20231117-SS0I-BDV9-LK6Q-ZZS0RXDJKLJZ-low.svgFigure 3-1 EVM Connection for Basic Operation