3. Install the cell simulator shunts.
4. Install the interface shunts to the INT positions.
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
CELL5
terminals and
adjust to approximately 18 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 and set the Enabled Protections A CUV bit. Writing to the data memory after
setting the 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
DSG_FET and CHG_FET bits in the FET Status register of the BIT Registers section are on and that
the Stack voltage and the Pack pin voltage registers in the Registers section are approximately equal.
The SLEEPCHG bit is enabled by default, if the SLEEP status is set CHG_FET will be off. Click the
SLEEP_DISABLE command button. Measure the PACK voltage on the board if desired.
13. Adjust the supply voltage to approximately 22 V. In the registers view observe that the COV bit turns on, the
CHG_FET bit goes off, and the Pack pin voltage drops to approximately 0.3 V below the Stack voltage.
14. Adjust the supply voltage to approximately 12 V. In the registers view observe that the CUV bit turns on, the
DSG_FET bit goes off, and the Pack pin 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 BQStudio software and turn off the power supply.
Refer to other sections of this user guide for additional details.
DC Power Supply
+ -
Install cell
simulator shunts
Position shunts
to “INT”
Figure 2-1. EVM Connection for Basic Operation
BQ76922EVM Quick Start Guide
SLVU957A – SEPTEMBER 2019 – REVISED NOVEMBER 2021
BQ76922EVM Evaluation Module
5
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