2.2 Quick Start
The BQ76952 registers must be configured to enable most protections, select the monitored cells, and enable
the protection FETs on the EVM. This quick start section does not describe current protection settings. Once all
registers are configured, the values may be written to One Time Programmable memory (OTP) for use on the
next reset of the device, but since that is a permanent change it is not part of this quick start procedure. This
quick start assumes a new EVM without OTP configuration settings. If your board has a part with configuration
stored in OTP refer to
These steps describe quick connection of the BQ76952 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
1. Download the BQSTUDIO Software from the tool folder link
.
2. Install the BQStudio software (see
).
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 "
CELL16
" terminals
and adjust to approximately 48 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 38 V. In the registers view observe that the DSG_FET bit goes off
and the PACK voltage drops to approximately 0 V.
14.Make other adjustments as desired for evaluation. See other sections of this user guide for details of
operation.
15.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.
BQ76952 EVM Quick Start Guide
SLUUC33A – NOVEMBER 2019 – REVISED OCTOBER 2020
BQ76952 Evaluation Module
5
Copyright © 2020 Texas Instruments Incorporated
