Texas Instruments Evaluation Module for BQ76925 Analog Front End for 3 to 6 Series Lithium-Ion Cells BQ76925EVM BQ76925EVM データシート
製品コード
BQ76925EVM
Operation With Cells
Disconnect all external electronics from the bq76925EVM prior to the connection of real cells. This
includes power supplies, electronic load, USB-TO-GPIO Adapter or MSP-FET430UIF that may be
connected.
includes power supplies, electronic load, USB-TO-GPIO Adapter or MSP-FET430UIF that may be
connected.
7.2
Battery Connection Sequence
The connection of a real battery pack to the bq76925EVM requires a certain connection sequence for safe
operation.
operation.
The fundamental connection sequence is:
1. Ensure that all switches on S4 are open.
2. Connect BATT
2. Connect BATT
–
.
3. Connect BATT+.
4. Connect CN6. The cell inputs have a specific assignment (1-1, 2-2, 3-3,etc) but no specific connection
4. Connect CN6. The cell inputs have a specific assignment (1-1, 2-2, 3-3,etc) but no specific connection
timing sequence is required.
Remove the CN6 mating connector from the board before wiring cell connections to the terminals.
Remove the CN6 mating connector from the board before wiring cell connections to the terminals.
7.3
Six-Cell Operation
The procedure for six-cell operation with a cell pack is as follows:
1. Ensure that all switches on S4 are open.
2. Wire the seven-cell tap wires to the mating plug of CN6.
3. Connect BATT
2. Wire the seven-cell tap wires to the mating plug of CN6.
3. Connect BATT
–
.
4. Connect BATT+.
5. Connect CN6 to the EVM. The cell inputs can be connected in any order.
6. Connect to the evaluation software.
7. Change the Select Cell Count drop-down box on the home screen to 6.
5. Connect CN6 to the EVM. The cell inputs can be connected in any order.
6. Connect to the evaluation software.
7. Change the Select Cell Count drop-down box on the home screen to 6.
7.4
Five-Cell Operation
The procedure for five-cell operation with a cell pack is as follows:
1. Ensure that all switches on S4 are open.
2. Wire the six-cell tap wires to positions 2 through 7 on the mating plug of CN6.
3. Apply a jumper wire from pin 1 to pin 2 on mating plug of CN6. (These are the inputs marked Cell 6
2. Wire the six-cell tap wires to positions 2 through 7 on the mating plug of CN6.
3. Apply a jumper wire from pin 1 to pin 2 on mating plug of CN6. (These are the inputs marked Cell 6
and Cell 5.)
4. Connect BATT
–
.
5. Connect BATT+.
6. Connect CN6 to the EVM. The cell inputs can be connected in any order.
7. Connect to the evaluation software.
8. Change the Select Cell Count drop-down box on the home screen to 5.
6. Connect CN6 to the EVM. The cell inputs can be connected in any order.
7. Connect to the evaluation software.
8. Change the Select Cell Count drop-down box on the home screen to 5.
7.5
Four-Cell Operation
The procedure for four-cell operation with the simulation circuit is as follows:
1. Ensure that all switches on S4 are open.
2. Wire the five-cell tap wires to positions 3 through 7 on the mating plug of CN6.
3. Apply jumper wire from pin 1 to pin 2 on plug for CN6. These are inputs marked Cell 6 and Cell 5.
4. Apply jumper wire from pin 2 to pin 3 on plug for CN6. These are inputs marked Cell 5 and Cell 4.
5. Connect BATT
2. Wire the five-cell tap wires to positions 3 through 7 on the mating plug of CN6.
3. Apply jumper wire from pin 1 to pin 2 on plug for CN6. These are inputs marked Cell 6 and Cell 5.
4. Apply jumper wire from pin 2 to pin 3 on plug for CN6. These are inputs marked Cell 5 and Cell 4.
5. Connect BATT
–
.
6. Connect BATT+.
7. Connect CN6 to the EVM. The cell inputs can be connected in any order.
8. Connect to the evaluation software.
9. Change the Select Cell Count drop-down box on the home screen to 4.
7. Connect CN6 to the EVM. The cell inputs can be connected in any order.
8. Connect to the evaluation software.
9. Change the Select Cell Count drop-down box on the home screen to 4.
33
SLUU514
–
July 2011
bq76925EVM Evaluation Module
Copyright
©
2011, Texas Instruments Incorporated