Datasheet
5- 0 5 10 15 20 25 30 35 40 45 50
0
4000
8000
12000
16000
20000
24000
28000
32000
36000
40000
RNTC(T)
Rp(T)
Temperature-(T)
2.25V
RT1
NTC
TS
RT2
+
-
+
-
RT3
V (45)
HOT
V (0)
COLD
TPS65070, TPS65072, TPS65073
TPS650731, TPS650732, TPS650701, TPS650702, TPS650721
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SLVS950G –JULY 2009–REVISED MAY 2013
Resistor RT2 in parallel to the NTC is used to linearize the resistance change with temperature of the NTC. As
the NTC has a high resistance at low temperature, the resulting resistance of NTC in parallel with RT2 is lower
especially for low temperatures where the NTC has a high resistance, so RT2 in parallel has a significant impact.
For higher temperatures, the resistance of the NTC dropped significantly, so RT2 in parallel does not change the
resulting resistance a lot. See Figure 46.
Figure 46. Changing the Temperature Range
Figure 47. NTC [R(T)] and NTC in Parallel to RT2 [Rges(T)]
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