These cores are ideal candidates for PFC boost inductor applications in power supply ranges from 300 to 6kW (for higher power design see Powerlite).  Microlite 100μ are tape wound amorphous toroidal cores with a small gap, which allows the core to achieve permeabilities less than 245. The material is stable over a wide temperature range and offers a design with fewer and smaller gaps than comparable E-core ferrites. The fewer gaps and smaller gap size greatly reduces EMC concerns from fringing flux and stray field. Most designs can be constructed with few turns and lower losses providing a smaller more cost effective design. In some cases these cores maybe a good alternative for differential input inductors, and SMPS output inductors. Various standard core sizes are available.

MICROLITE 100μ Cores vs. The Competition  -  Properties

This comparison was done using 2500 perm ferrite and core loss comparison performed at 100 kHz and 1 kG_BAC

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