According to the linked FAQ,
" Normal battery Charge -- Connected to NTC thermistor in battery pack to monitor battery temp. 50uA current source will develop a voltage that is monitored by internal voltage comparators. Charge is suspended above 1230mV and below 178mV. If NTC is not used a 10k resistor will enable normal operation."
I would like to ask: Are the suspended voltage 1230mV and 178mV can be calculated with below equation?
(NTC_Mitsubishi_TH05-3H103F resistance at 0 degC) x 50uA current source = 24.6 kohm x 50uA = 1230mV
and (NTC_Mitsubishi_TH05-3H103F resistance at 60 degC) x 50uA current source = 3.56 kohm x 50uA = 178mV ??
However, from the datasheet of NTC_Mitsubishi_TH05-3H103F (Link: https://www.mmc.co.jp/adv/dev/csv_pdf/TH05/TH05-3H103F.pdf),
the NTC thermistor value at 0 degC is 27.1 kohm instead of 24.6 kohm (which represents about 2.5 degC),
and thermistor value at 60 degC is 3.036 kohm instead of 3.56 kohm (which represents about 54.5 degC).
Is it because of the voltage comparator error/tolerance? or my equation is not correct?