Comparator threshold setting of the BT3554

Comparator threshold setting of the BT3554

Question

How should I decide on the threshold values for the comparator of the BT3554? My target battery does not show the internal resistance in its specifications.

Answer

In general, the following is recommeded:

1) Measure the internal resistance of the fully charged new battery.
2) Set "x1.5" for WARNING and "x2.0" for FAIL
Then, set the rated voltage for the voltage threshold.

NOTE:
The internal resistancce value differs by the battery brand and model so be sure to different settings for each battery if you have several battery models to measure.

Please refer to 1.1 of the instruction manual for more details.