DC Power Supply
+ -
Boot
Switch
Pull-ups
Required
Install Gauge Shunts
Cell Simulator Switches
on for
Power Supply
Electronic Load
+ -
EV2400
U
SB
SMB
I2
C
bq76920 EVM Quick Start Guide
7
SLVU924D – March 2014 – Revised November 2018
Copyright © 2014–2018, Texas Instruments Incorporated
bq76920 Evaluation Module User's Guide
16. Select the
Registers
view and Refresh the values. Observe that all supported cells now show a
voltage reading.
17. Send the FET_EN command using the
Commands
view or the from the
Advanced Comm SMB
view.
18. Select the
Registers
view and Refresh the values. Observe that the FET_EN bit is now set and that
the CHG and DSG FET status is shown enabled.
19. Select the
Calibration bq78350
view.
20. Enter the board temperature in the
Temperature Sensor
boxes and click on the
Calibrate
Temperature
button. Wait until a check box appears next to the button.
21. Measure the voltage of the BATT terminals. Divide the value by the number of cells and enter the
value in mV in the
Ext Average Cell Voltage
box. Click on the
Calibrate Voltage
button. Wait until a
check box appears next to the button.
22. Disconnect the load from the PACK terminals. Click on the
Calibrate CC Offset
button and wait until
the check mark appears next to the button.
23. Connect the load set to a known value of approximately 2 A to the PACK terminals. Enter the value in
mA into the
Applied Current
box. Discharge current should be entered as a negative value. Click on
the
Calibrate Current
button and wiat until the check mark appears next to the button.
24. Select the
Registers
view and Refresh the values. Observe the updated voltage, temperature and
current values.
The EVM is functioning and ready for further configuration for evaluation. Refer to the Technical
Reference Manual (TRM) or other documents for the bq78350, and the other sections of this user guide
for additional information.
Figure 2. EVM Connection for Basic Gauge Operation
