Fly-Buck Converter
A Fly-Buck converter, is a transformer based switching regulator where the inductor of a buck converter is replaced by a transformer with a 1 to N ratio between primary and secondary.
The secondary output voltage (VOUT_sec) is ratio of the primary voltage (VOUT_pri) given by the transformer ratio (N) while being isolated from it.
\[VOUT_{pri} = N * VOUT_{sec}\]