2 BQ77207 EVM Getting Started Guide
2.1 Before You Begin
The following warnings and cautions are noted for the safety of anyone using or working close to the
BQ77207EVM. Observe all safety precautions.
2.2 Warnings and Cautions
CAUTION
The BQ77207 does not limit performance to the ratings of the EVM. Set equipment appropriately to
limit voltage and current for safe operation.
CAUTION
The circuit module has signal traces, components, and component leads on the bottom of the board.
This may result in exposed voltages, warm surfaces, or sharp edges. Do not reach under the board
during operation.
2.3 Quick Start
The BQ77207 installed on the board will output DOUT and/or COUT high during faults as described in the
BQ77207 data sheet.
The BQ77207 is configured for cell count by the connections on the board. By default the board is set up for
seven cells and this quick start is for all seven cells. When fewer cells are used, refer to
and adjust the
supply voltage appropriately.
These steps describe quick connection of the BQ77207 EVM to demonstrate operation of the protector function
of the EVM. For more detailed descriptions, refer to other sections of the user guide.
Refer to
1. Install the cell simulator shunts on J4 and the power supply shunt on J3.
2. Connect a 0-V DC power supply capable of approximately 250 mA between the “
BAT-
” and "
BAT+
" terminals
and adjust to approximately 22 V.
3. Connect a meter to a VSS test point and monitor the COUT or DOUT test points, or the corresponding
signals at J2 terminals 2 or 3.
4. With nominal conditions observe that both COUT (J2 pin 2) and DOUT (J2 pin 3) are low, approximately 0 V.
5. Demonstrate an open-wire condition:
a. Remove the cell simulator shunt for cell 2, J4 pins 11 and 12.
b. Observe the COUT and DOUT signals go to approximately 7 V after 4.5 seconds.
c. Install the cell 2 cell simulator shunt at J4 pins 11 and 12.
6. Demonstrate an overvoltage condition:
a. Adjust the supply voltage to approximately 32 V.
b. Observe the COUT transitions to approximately 7 V after 1 second.
c. Confirm DOUT is low if desired.
d. Adjust the supply voltage to approximately 22 V.
7. Demonstrate an undervoltage condition:
a. Adjust the supply voltage to approximately 12 V.
b. Observe DOUT transitions to approximately 7 V after 1 second.
c. Observe COUT is low if desired.
d. Adjust the supply voltage to approximately 22 V.
8. Make other adjustments as desired for evaluation. See other sections of this user guide for details of
operation.
9. When complete with this quick start demonstration, turn off the power supply.
Refer to other sections of this user guide for additional details.
BQ77207 EVM Getting Started Guide
4
BQ77207 Evaluation Module
SLUUCI0 – OCTOBER 2021
Copyright © 2021 Texas Instruments Incorporated
