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BQ25120A: Thermal Protection Threshold Question

Part Number: BQ25120A

Hi Team,

Quick question:

We want to allow charging only from Cold=15°C to Hot=45°C.

The circuit looks like; R_lo=20K, R_hi=15K8 and NTC is 10K with B=3435 (Rntc@15°C=14740, Rntc@45°C=4916).

Looking at Equation 1 and 2 on page 26 and it seems that 15°C-45°C range is not achievable with the NTC that has B=3435, it seems that we would need B=3550 or greater.

Is this statement correct or do I have my math wrong?

I would greatly appreciate your confirmation as well as comments or suggestions on this matter.

Regards,

Ramon