Selecting the appropriate Coilcraft Model

Which Model Should I use?

• Do not use SPICE models or S-parameters for inductor core loss estimates.

• MagPro™ DC-DC Optimizer and Power Inductor Finder and Analyzer tools are best for core and winding loss  

Coilcraft Large signal / high current time domain models  - capture saturation effects

• Use these models to capture inductance vs current effects in time-domain simulations

• Only for soft-saturating Coilcraft power inductors

• Included in the Coilcraft LTspice and Pspice libraries 

Coilcraft Small signal / low current time domain SPICE models include:

 LTspice basic (RLC) small signal Models included in the LTspice standard inductor library (ind.lib)

• Use these models for low current time domain or frequency domain simulations

• These do not capture frequency-dependent inductance or resistance 

• Use well below the SRF in the frequency domain or equivalent SRF in time domain 

Coilcraft Impedance (RLC) small signal SPICE Models

• Use these models for time domain / transient simulations details

• A step above the LTspice basic models for better accuracy

• Use up to or slightly above the SRF  

•  Included in the Coilcraft LTspice and Pspice libraries 

Coilcraft Advanced (Laplace) small signal SPICE Models

• Use these models for low current frequency domain simulations

• These capture frequency-dependent inductance and resistance

• Highest accuracy for small signal frequency domain simulations

• Results match those of Coilcraft’s advanced (Laplace) models

• Use up to or slightly above the SRF

• Download on product web page (resources) or here (Select a Part Model)

Coilcraft small signal S-parameter (Touchstone) Models

• Use these models for low current frequency domain simulations

• These capture frequency-dependent inductance and resistance

• Highest accuracy for small signal frequency domain simulations

• Results match those of Coilcraft’s advanced (Laplace) models

• Use up to or slightly above the SRF 

• Download on product web page (resources) or here (Select a Part Model)

Coilcraft Inductor Model Formats

Notes:

1. Included with standard LTspice installation
2. Included with Coilcraft LTspice and Pspice libraries
3. Soft-saturating inductors only
4. Find on our SPICE models page "Select an Individual Part Model"