Temperature (qC)

0

25

50

75

100

125

150

0

1

2

3

4

5

6

D014

200 k

5 V

200 k

10 k

200 k

300 k

13

TMP63

www.ti.com

SNIS211 – OCTOBER 2019

Product Folder Links: TMP63

Submit Documentation Feedback

Copyright © 2019, Texas Instruments Incorporated

Typical Application (continued)

Figure 8. Thermal Foldback Using TMP63 Voltage Divider and a Rail-to-Rail Op Amp

110°C, then the output will swing low to the 0-V rail of the op amp. The rate at which the foldback occurs is

This in return controls the voltage/temperature sensitivity of the circuit. This voltage output is fed into a LED

and is given in Equation 7. In this example where the knee point is set at 110°C, the output voltage curve is as

shown in Figure 9.

(5)

(6)

(7)

Figure 9. Thermal Foldback Voltage Output Curve