I used both Qspice and LTspice to simulate a Buck Boost converter design using two UCC27282 drivers and 4 MOSFET in H-Bridge setup, I imported models for UCC27282 in both Qspice and LTspice, i set up the simulation to run for 20 msceonds in both
For Qspice:
Simulation time is 4.97 minutes, efficiency as measured on the plot 96%, 12V to 20V boost , duty cycle 62.65% , open loop
For LTspice:
Simultation time is 4.24 minutes, efficieny as measured on the plot 97%, 12V to 20V boost , duty cycle 62.65%, open loop
MOSFETs are slightly different in the two simulations but very close, got the mosfets from the built in library of both simulators,BSC070N100 in Qspice and BSZ076N06 in LTspice
Regards,
Suded