bq76200EVM Quick Start Guide
BATSR– is the negative terminal of the power supply or after the sense resistor. When using a power
supply for evaluation, be sure the power supply can accept or is protected from any reverse current
such as with a blocking diode if another supply is used in the system.
•
Pack terminals (PACK+ and PACK–)
Attach the load or charger to the pack terminals. If using a power supply to simulate a charger, be sure
it can accept or is protected from any reverse current.
•
Ground shunt (J3)
This shunt connects the IC VSS to the high-current return path. When the shunt is removed, the two
signals are connected with a 1-k
Ω
resistor.
•
Control voltage shunt (J6)
This shunt connects BATT+ to a zener regulator to provide an on-board control voltage for simple
evaluation.
•
Control input header (J7)
J7 allows enabling the bq76200 control signals from the on-board zener regulator voltage using shunts.
See the bq76200 data sheet for the description of the control signals. The divided pack voltage can
also be accessed here as the PDIV signal. When the shunts are not used, the header may be used for
connection to other equipment.
•
Control input terminal block (J8)
The J8 terminal block provides an alternate connection point for control inputs and PDIV signal.
2.4
Quick Start Sequence
These steps describe a simple demonstration or check of the operation of the bq76200EVM.
1. Connect a 100-k
Ω
resistor to the PACK terminals.
2. Confirm shunts are in place on J3, J6, and J7 at the PMON, CPEN, PCHG, CHG, and DSG positions.
3. Connect a 10-V power supply across the BATT+ and BATSR– terminals.
4. Enable the supply.
5. Measure the voltage on the pack terminals. Observe this is approximately 10 V.
6. Remove the shunt at the J7 CHG position. Observe that the pack voltage drops approximately 300 mV
below the supply. When using a smaller load resistor the voltage drop will be greater
7. Remove the shunt at the J7 PCHG position also. Observe that the pack voltage drops to approximately
500 mV below the supply. When using a smaller load resistor, this additional drop may not be
observed.
8. Re-install the CHG and PCHG shunts.
9. Remove the shunt at the J7 DSG position. Observe that the pack voltage drops to approximately 0 V.
10. Measure the voltage on the PDIV pin J7 pin 3 or J8 pin 2. Observe that this voltage is approximately 0
V.
11. Re-install the shunt at the J7 DSG position. Observe that the PDIV voltage is approximately 0.36 V.
12. Remove the shunt at the J7 PMON position. Observer that the PDIV voltage drops to approximately 0
V.
13. Re-install the PMON shunt.
14. Disable the power supply and disconnect, if complete.
6
bq76200 High Voltage Battery Pack Front-End Charge/Discharge High-Side
SLVU926 – July 2015
NFET Driver Evaluation Module
Copyright © 2015, Texas Instruments Incorporated