Lastly, if the supply operates at a high frequency and the current through the
filter is high, then the one might consider using litz wire, which is a wire made
up of much smaller gauge wires to reduce the skin effect. Litz wire has an overall
larger diameter than single-strand wire with the same overall cross-sectional
area.
3.5.6 Designing the Mutually Coupled Forward-mode Filter Choke
Within multiple-output forward converters, it is possible to easily combine the
filter chokes of complementary outputs (i.e., +/- 5V, etc.) together on the same
core (see Figure 3–21). This offers several advantages; it saves space, vastly
improves cross-regulation of ...