Part Number:BQ34Z100-G1
Hello all,
I'm planing to incorporate the BQ34Z100-G1 gas gauge in an up coming BMS design. Because if legacy stock, and the fact that they are used in different places of the system, my external NTC resistor will be different than the one specified in the datasheet - the Semitec 103AT type. My NTC, as the 103AT type, will be 10k @ 25 degrees. The difference is in the beta exponential coefficient, the 103AT type has a nominal value of B=3435 [K] where as my NTC has a B=3988[K].
I found some references about the way that the BQ34Z100-G1 calculates back the temperature from the ADC reading [1], but I can't find any info on how to do that exactly. From what I can find, there might be a way to update the polynomial coefficients the the gauge uses, but I can't find any info on how to do that.
Is this even possible? Or am I forced to use a 103AT (or equivalent) NTC type of resistor?
[1] - e2e.ti.com/.../722764
Cheers,
Aleks