Any ways to shorten simulation time

[walker5678]

If you are designing a DC/DC converter, you must have a clock frequency more than 1MHz, so the simulation time becomes very long.

Is there any good ways to shorten the simulation time?

 

[shatruddha]

Which software are you using for simulation?

 

[crutschow]

Likely not, if you are doing a transient simulation. Typically the feedback loop dynamics of such a circuit are done by doing an AC simulation using linear equivalent blocks for the switching portions of the circuit to optimize the feedback loop. This is much faster than a transient simulation. After that you can verify the design using transient analysis with the switching circuit added which, of course, will require the longer simulation time.

 

[dick_freebird]

It depends what you are trying to simulate. First question
is always, "do I need full detail for ____"? Odds are, only
a sliver of the path really needs maximum accuracy and
granularity. If you don't intend to plot it or print it, maybe
it is better represented behaviorally and/or with continuous
(state space average?) macromodels.

That's how LTSpice acts so fast while using a fairly ordinary
SPICE engine at the bottom of it all - their devices have
a lot of work put into behavioral modeling for the bits that
don't have much "pin exposure".

 

[walker5678]

Typically the feedback loop dynamics of such a circuit are done by doing an AC simulation using linear equivalent blocks for the switching portions of the circuit to optimize the feedback loop.

I am using general averaged switch model, which is in the book " Fundamental of power electronics" , and write veriloga model to substitute the buck switch network, and do AC analysis, but found it is difficult to establish the DC operating point. I am still researching.