Create a NTC thermistor model in QSPICE in a few minutes using simple information from the data sheet and /or design tools
The users of the software QSPICE from company QORVO are now well aware of the fact that it proposes an option to create transistors and diode models based on data sheet input. Learn How to Create QSPICE Models in Minutes - Qorvo. This motivated me to apply the same techniques to elaborate a temperature as voltage driven NTC thermistor model, applying the same kind of procedures. The base file is a spreadsheet written in Excel(TM). Inputting a P/N, and its basic characteristics into a table leads to the formation of the NTC thermistor model text file, that can be directly imported in QSPICE and that is directly operational.
The NTC characteristics are :
- the P/N
- the dissipation factor (D)
- response time (tau)
- R(25°C) and tolerance
- B characteristics and tolerance
- 7 points for the resistance vs temperature characteristic
An example is showed into the spreadsheet related to a Vishay thermistor NTCS0805E3103FHT; but in the practice, every proper thermistor data sheet can be used to build a QSPICE thermistor model.
The netlist will be exclusively working in QSPICE and won't work in plug and play as is in another spice EDA.
When imported in QSPICE with copy/paste, it will suffice to acknowledge the validation of the text as hereunder to have an operational model:
The simulation in time is exemplified hereunder
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