Texas Instruments Evaluation Module for BQ76925 Analog Front End for 3 to 6 Series Lithium-Ion Cells BQ76925EVM BQ76925EVM Datenbogen
Produktcode
BQ76925EVM
Circuit Details and Configuration
Table 7. J3, V3P3 Pin Circuit Configuration
Header Name
Position
Purpose
1 - 2
External V3P3 source in circuit (default).
J3
OFF
External V3P3 source in circuit
Table 8. J4, V3P3 Pin Capacitor Circuit Configuration
Header Name
Position
Purpose
1 - 2
External V3P3 source in circuit 1-
µ
F + 4.7-
µ
F
capacitance used (default).
J4
OFF
Internal V3P3 source in circuit and 1-
µ
F capacitance
used
Table 9. J5, SENSEP Pin Circuit Configuration
Header Name
Position
Purpose
1 - 2
SENSEP connected to sense resistor for normal operation
(default).
(default).
J5
OFF
SENSEP disconnected from sense resistor. This is a test mode
operation where a mV source is applied to J5:pin 1 for simulation
of current.
operation where a mV source is applied to J5:pin 1 for simulation
of current.
Table 10. J6, DVCC Pin Circuit Configuration
Header Name
Position
Purpose
1 - 2
Power to MSP430 during programming is from VCC-Tool. (default)
J6
2 - 3
Power to MSP430 during programming is from VCC-Target.
2.2.1
Cell Simulator DIP Switch (S4)
The eight-position DIP switch (S4) allows the user to simulate cell-voltage inputs to the bq76925 rather
than supply actual cell voltages. See
than supply actual cell voltages. See
for details of the operation of the DIP switch.
CAUTION
Use silkscreen labeling and square pin 1 pad to determine orientation and
operation of the eight-position DIP switch. Ignore numbers actually printed on
the switch.
operation of the eight-position DIP switch. Ignore numbers actually printed on
the switch.
All S4 dip switches must be opened when using a battery with the EVM.
Table 11. DIP Switch, S4
Switch
Terminal
Label
Purpose
Name
S4
1
Battery
Switch to connect power supply to resistor network. Closure
activates LED D13.
activates LED D13.
2
Cell 6
Applies simulated cell voltage to VC6.
3
Cell 5
Applies simulated cell voltage to VC5.
4
Cell 4
Applies simulated cell voltage to VC4.
5
Cell 3
Applies simulated cell voltage to VC3.
6
Cell 2
Applies simulated cell voltage to VC2.
7
Cell 1
Applies simulated cell voltage to VC1.
8
Cell 0
Applies simulated cell voltage to VC0.
9
SLUU514
–
July 2011
bq76925EVM Evaluation Module
Copyright
©
2011, Texas Instruments Incorporated