Example LT4295 optimization- especially in steady-state.


 

Hello, 

I uploaded the LT4295 example file that came with LTSpice to the temp folder just now. Surprisingly, it runs very slow despite being an example circuit. It seems to be only useful for showing the handshake/negotiation between the PSE and the PD. Even if only reviewing the initial couple of hundred milliseconds, it take a long time- and I do keep seeing Def Con 1 notifications in the status bar when I try to load it or add any additional circuitry.

I want to be able to simulate some modifications to the feedback net of the circuit- but it is very time consuming. I would think that, coming from ADI directly it would already be optimized, but I wonder if anyone has any suggestions for making the sim run faster. I attempted to use an auxiliary supply to skip over all of the PoE "handshaking" but then the simulation wouldn't converge at all. Appreciate any suggestions!