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Pack Assembly and the bq28400
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Figure 14. Connection Sequence
Follow these steps to connect a 2-series cell battery to the bq28400EVM board.
1. Connect the most negative terminal (– terminal of cell 1) of the serially connected, 2-cell battery stack
to the 1N PIN of the TB1 connector, as shown in
. (See also
for the TB1 location).
2. Connect the positive terminal of cell 1 to 1P.
3. Connect the positive terminal of cell 2 to 2P.
4. Press the SW1 switch on the EVM. This will apply the battery voltage on the PACK+ pin and wake up
the EVM from shutdown mode.
5. Connect the SMBus connector (J2) to the EV2x00 adapter and start the EV software.
6. Navigate to the Flash Screen. Change the flash constants that correspond to the specific parameters
of your application (refer to the data sheet or other application reports). For the first evaluation, the
default values may be used.
7. Navigate to the Calibration screen. Follow the procedures in
to calibrate the EVM.
To enable certain features and for gauging, refer to the Technical Reference Manual (
20
bq28400EVM-001 SBS 1.1 Compliant Tablet PC and Netbook 2-Series Cell
SLUU494 – February 2011
Li-Ion Battery Gas Gauge and Protection
© 2011, Texas Instruments Incorporated