Software
The example shows a significant drop in voltage when balancing is enabled because the test data were
captured using a resistor ladder board and a power supply. If the input sense lines had been connected to
a battery pack, this drop would have been much less severe. However, a small decrease in voltage for
any channel being balanced is expected, and this could cause the voltage on a selected channel to drop
below a user selected undervoltage threshold, thus causing a UV fault. If the
Continue on Fault
checkbox
is not checked, then balancing in this condition stops automatically. This condition is shown in
,
in which the UV Fault Threshold was set to 2.1 V. The Bal_En indicator is red to indicate a fault stopped
the balancing function.
In
, the same undervoltage threshold condition (2.1 V) was maintained, but the
Continue on Fault
checkbox was checked. Balancing is continuing despite a UV fault (and a Device (Checksum) Fault). The
Bal_En indicator is green showing that balancing is still functioning, despite the indicated faults.
Figure 27. Aborted Balancing Due to UV Fault
40
bq76PL455EVM and GUI User Guide
SLUUBA7A – April 2015 – Revised July 2015
Copyright © 2015, Texas Instruments Incorporated
