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Quick Start Guide
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 3-1
for the following steps.
1. Download the BQSTUDIO software from the tool folder link
www.ti.com.
2. Install the BQStudio software (see
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.
10
BQ76905 Evaluation Module
Section
4.1.2).
Short
CELL6 to CELL5 and
DC Power Supply
CELL4 to CELL3
+ -
Figure 3-1. EVM Connection for Basic Operation
Copyright © 2023 Texas Instruments Incorporated
www.ti.com/tool/BQSTUDIO
Position shunts
Install cell
to uC_SCL and
simulator shunts
uC_SDA
www.ti.com
or search from
SLUUCY9 – NOVEMBER 2023
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