Texas Instruments Evaluation Module for BQ76925 Analog Front End for 3 to 6 Series Lithium-Ion Cells BQ76925EVM BQ76925EVM Datenbogen
Produktcode
BQ76925EVM
Quick-Start Demonstration
Table 13. Test Points (continued)
Label
Ground Reference Test Point
TP13
ALERT
TP14
VIOUT
TP15
VCOUT
TP16
VTB
TP17
VREF
TP18
SDA
TP19
SCL
TP20
V3P3
TP21
BATT+
TP22
PACK
–
TP23
P2.5 ON MSP430
TP24
P3.7 ON MSP430
TP25
P3.5 ON MSP430
TP26
P3.4 ON MSP430
TP27
P3.0 ON MSP430
TP28
VSS
TP29
VSS
2.5
bq76925
The bq76925 application circuit provided allows for complete evaluation of the device performance with 3-,
4-, 5-, or 6-cell battery packs. Cell voltages, battery current, and temperature can be monitored.
Monitoring is possible with the firmware that is preloaded into the MSP430 microcontroller and with the
bq76925 Evaluation Software provided. Alternatively, the user can develop a custom system if desired.
4-, 5-, or 6-cell battery packs. Cell voltages, battery current, and temperature can be monitored.
Monitoring is possible with the firmware that is preloaded into the MSP430 microcontroller and with the
bq76925 Evaluation Software provided. Alternatively, the user can develop a custom system if desired.
2.6
MSP430F2122
The MSP430F2122 application circuit is provided to read the analog signals from the bq76925 and make
them available for reading over the I2C bus by the bq76925 Evaluation Software. The MSP430 circuitry is
designed to allow the user to create custom firmware if desired.
them available for reading over the I2C bus by the bq76925 Evaluation Software. The MSP430 circuitry is
designed to allow the user to create custom firmware if desired.
3
Quick-Start Demonstration
This section demonstrates the measurement system of the bq76925 using the onboard cell simulator.
To quickly get the bq76925EVM up and running, follow the instructions in this section. The following
equipment and software are required:
equipment and software are required:
•
bq76925EVM Evaluation Module
•
A 24-Vdc power supply
•
Power supply capable of up to 100 mV and at least 100 mA of drive capability.
•
PC with MS Windows operating system
•
bq76925 Evaluation Software
•
USB-TO-GPIO Adapter
3.1
Evaluation Software and USB-TO-GPIO Adapter
The bq76925 Evaluation Software and the USB-TO-GPIO Adapter must be installed and set up.
The USB-TO-GPIO Adapter is an EVM that is sold separately from the bq76925EVM. The firmware in it
must be changed to work with the bq76925 because this EVM was developed for generic applications. Go
to the TI Web site to download the firmware loader.
must be changed to work with the bq76925 because this EVM was developed for generic applications. Go
to the TI Web site to download the firmware loader.
11
SLUU514
–
July 2011
bq76925EVM Evaluation Module
Copyright
©
2011, Texas Instruments Incorporated