Any ways to shorten simulation time

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walker5678

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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?
 

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.
 
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".
 
crutschow said:
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.
Click to expand...

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.
 

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