High-Power Resonant AC/DC Converter

ClassEgg® is the EcoVoltas architecture for high-power applications that require Power Factor Correction (PFC).

ClassEgg® is a Zero Voltage Switching resonant architecture that has been designed to offer a single-stage converter able to act both as PFC and isolated regulator, improving efficiency dramatically in comparison with traditional boost PFC + LLC resonant converters.

ClassEgg® efficiency is at a maximum in the range from 50% to 100% load. For this reason, this architecture is best suited to high-power PSUs for servers, large home appliances and electric and hybrid vehicles.


High power resonant converter based on ClassEgg® architecture controlled by EPIC101AxCExx and EPIC102AxCExx controllers


Eggtronic patented resonant topology

Hybrid inductive-capacitive coupling

Hybrid non dissipative rectifier-regulator

ZVS always guaranteed

Weak-coupling transformer (k < 1)

SiC devices preferred


Higher overall efficiency (lower ohmic losses and ZVS)

Strongly reduced BOM

Easy driving of low-side MOSFET at high frequency

Lower overall cost

Extremely compact solution

Better EMI performances

Smaller EMI filter

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