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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