To be honest, we dont know yet, we are at the bidding stage, but just know its a SMPS with a planar on it , (approx 30vin 30vout, 400 = pout) and for whatever reason, it doesnt work properly. So the planar may have to be re-done. But from my research so far, it is not actually possible or adviseable for a person to design a planar unless they have the proprietary planar design software, which advises on things like need for interleaving, pairing for dv/dt, edge effect avoidance etc etc, best way to do lead frames, how to calculate stray C and L?
So my question, due to my research, is .....is it actually even possible for an engineer to design a planar themselves without the highly expensive proprietary planar design software?