Simulations & Hardware Board (PCB)?

[madhu.b]

Hello,

Why simulation results and hardware results are not matching each other in power converters?
can you tell me few reasons.....

 

[BradtheRad]

Real components generally contain internal resistance. This is not necessarily factored into a simulation.

Example: power supply, transformer, diodes, coils, etc.
Even capacitors have a certain amount of ESR, although we are not used to thinking it could be high enough to reduce performance.

I often add a few tenths of a volt in places, to bring greater realism to the simulation.

Another thing that might reduce power, is when a real transistor/mosfet does not turn on to the same degree as the simulated model.