These cores are packaged in a modular block with built-in single turn secondary winding using simple, stamped and formed parts. The modular blocks are mass produced which further reduces the costs. Modular blocks offer great flexibility in design. In addition, parasitic impedance can be better controlled which results in less snubbing and less stress on ancillary parts. Hot Spots are eliminated as individual elements in Flat Transformers are small with high surface to volume ratio.
Thermal paths are short.
Build-up of bulk windings does not exist. With excellent heat dissipation, higher flux densities can be used. Higher power densities are achieved by tightly packaging the small size transformer elements with its associated semiconductor and inductor in a common heat sink. Leakage inductance is low because of excellent coupling between the windings and the absence of multiple turns. Terminations to ancillary components and inductors are kept very short, resulting in excellent control of parasitic impedance.