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UC2843AQ: Not able to simulate part in LTspice using unencrypted spice subcircuit

Part Number: UC2843AQ
Other Parts Discussed in Thread: UCC28C43

Hello,

I am trying to use a UC2843AQ as a buck converter controller as shown in the picture attached below.

Im able to open the spice document and create a symbol using the UCC28C43_STEADY subcircuit, but when I run the simulation, it gets stuck and the results window never pops up. I was wondering if thre was anything I was doing wrong while trying to set up this chip for simulation. Thank you