Thanks for the device recommendation.
I'll start with the pmp9334 reference design. The efficiency is not a critical parameter for the design.
So, first i'll try to shift the minimum voltage from 30V down to 18V.
Regards
Mattias
Hsiang
The UCC28880 & UCC28881 can operate down to 30 V minimum, but the range from min to max input voltage will be limited by the ratio of Dmin (at max Vin) to the internal time-out Ton_to (for overlaod & short-circuit protection).
However…