quick start assumes a new EVM without OTP configuration settings. If your board has a part with configuration
stored in OTP refer to Section 3 and Section 4.
These steps describe quick connection of the BQ76942 EVM to demonstrate operation of the AFE portion of the
EVM. For more detailed descriptions, refer to other sections of the user guide.
Refer to Figure 2-1 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 3.2).
3. Install the cell simulator shunts.
4. Position shunts to uC_SCL and uC_SDA.
5. Attach the on board communication adapter USB connector to the PC using USB cable.
6. Connect a 0-V DC power supply capable of 250 mA minimum between the “BAT-” and "CELL10" terminals
and adjust to approximately 36 V.
7. Press and release the WAKE switch.
8. Start the BQStudio software. The GUI should open with a register display. Click on the Scan button to enable
repeated update of the display. The power supply may 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.In the Commands panel click on the FET_EN button.
12.In the Registers view click on the Scan icon so that the registers update periodically. Observe that the
CHG_FET and DSG_FET bits in the FET Status register are on and that the Stack voltage and the PACK pin
voltage registers are approximately equal. Measure the PACK voltage on the board if desired.
13.Adjust the supply voltage to approximately 45 V. In the registers view observe that the CHG_FET bit goes off
and the PACK voltage drops to approximately 0.5 V below the Stack voltage.
14.Adjust the supply voltage to approximately 24 V. In the registers view observe that the DSG_FET bit goes off
and the PACK voltage drops to approximately 0 V.
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 guide for additional details.
www.ti.com
BQ76942 EVM Quick Start Guide
SLUUC32A – NOVEMBER 2019 – REVISED OCTOBER 2020
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BQ76942 Evaluation Module 5
Copyright © 2020 Texas Instruments Incorporated
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