How can to simulate a NTC thermistor ?

Hi bogdan546,

Please check this in LTspiceHelp.

Also, please check this.

Thank you . I wish to know how to modify this function for a NTC sensor

Hi bogdan546, and john-kevin,

Maybe this library of NTC Thermistors from TDK for LTspice is what you're looking for, as an example?

https://www.tdk-electronics.tdk.com/en/1902446/design-support/design-tools/ceralink-model-library-for-ltspice

Regards,

Hooman

Hi bogdan546, and john-kevin,

Sorry, actually above link is the capacitor library by mistake.

For NTC Thermistors, you can download the pspice models here:

https://www.tdk-electronics.tdk.com/en/180516/design-support/design-tools/ntc-thermistors/ntc-thermistor-library-for-pspice

In the combined *.lib file that you get, I went ahead and selected one NTC B57211V2472J060 (datasheet link below) and imported it into LTspice (*.asy file) as an example shown in the zip file below (Extract All, and then double click the *.asc file to open an example test circuit using this NTC):

https://www.tdk-electronics.tdk.com/inf/50/db/ntc/NTC_Leadless_disks_K220.pdf

1031.NTC B57211V2472J060 7_2_21.zip

Hope this helps.

Regards,

Hooman

Yes that's what it was about. Thank you Hooman

O.k., the thread is already some days old. But here comes my solution:
In NTC datasheets the R_25 (resistance at 25 °C) and the temperature coefficient B25_50 normally is given. You can feed these data in LTspice into a behavioral source. See the example below:

You can see the plot above is exactly the R=f(t)-curve shown iin the datasheet.
I hope I could help you.

Made some thoughts again. The solution with the behaviour source is not the best way - when you feed it with a current source there will be problems. The best way is to model the resistor directly, see the following graphics:

As you can see it works equally with a current source and a voltage source as expected for a resistor.

 nerd62, How do you enter a resistor this way in LTSpice?  Maybe you could show how to create the component?  When I place a resistor in LTSpice, I don't get the option to enter the information that you're entering above.