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Pspice Advanced : SMOKE. Different smoke limits per Model

Dami

Hi,

 I start with the smoke analysis and I do not manage to create 2 resitances with different properties.

I am used to add Rbreakout resistors and to Edit the Pspice Model in order to give them different DEV (for example 1% and 10%) or TC1.

Now I would like to perform a smoke analysis on my design? is it possible?

The "part" VARIABLES in PSPICE_ELEM library defines all the smoke limits but there are the same for all the resistors....

Thanks

Dam 

 

Parents

  • DEV is a Tolerance parameter for use with Monte Carlo or Worst Case Analysis and the TC parameters are for the SPICE related coefficients for Value variations with Temperature. You need to look at the MAX_TEMP, POWER, SLOPE parameters for resistor stress parameters, you can override these for each component, rather than use the "Variables" values. The PSpice Advanced Analysis User Guide, pspaugca.pdf in the doc\pspaugca directory of the installation covers Advanced Analysis, Smoke and the "for Power Users" section covers the parameters and what they mean to the analysis.

    BTW: you can add as many user defined Variables as you need so you could have multiple definitions for RMAX, like RMAX1, RMAX2 and so on, give these a value in "Variables" and then change the RMAX property value on the component(s) to apply them.

Reply

  • DEV is a Tolerance parameter for use with Monte Carlo or Worst Case Analysis and the TC parameters are for the SPICE related coefficients for Value variations with Temperature. You need to look at the MAX_TEMP, POWER, SLOPE parameters for resistor stress parameters, you can override these for each component, rather than use the "Variables" values. The PSpice Advanced Analysis User Guide, pspaugca.pdf in the doc\pspaugca directory of the installation covers Advanced Analysis, Smoke and the "for Power Users" section covers the parameters and what they mean to the analysis.

    BTW: you can add as many user defined Variables as you need so you could have multiple definitions for RMAX, like RMAX1, RMAX2 and so on, give these a value in "Variables" and then change the RMAX property value on the component(s) to apply them.

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