Scope and purpose

This document introduces a complete Infineon Technologies AG system solution for an 11 kW bi-directional DCDC converter. The REF-DAB11KIZSICSYS board is a DC-DC stage with a wide range output using two inductors

and two capacitors (CLLC) resonant network with bi-directional capability. This converter can operate under

high power conversion efficiency, as the symmetric CLLC resonant network has zero-voltage switching

capability for primary power switches and synchronous-rectification commutation capability for secondaryside output rectifiers. The converter could change the power flow direction, and its maximum power

conversion efficiency was around 97.2% during the operation without synchronous-rectification.

This document shows the board using 1200 V CoolSiC™ MOSFETs in TO247-4 package and EiceDRIVER™ 1ED

compact gate driver ICs, which leverage the advantages of SiC technology including improved efficiency, space

and weight savings, part count reduction, and enhanced system reliability.

Intended audience

This document is intended for engineers who want to use 1200 V and 1700 V CoolSiC™ MOSFETs with

EiceDRIVER™ driver ICs for bi-directional resonant topology applications such as EV-charger wall box, energy

storage systems to achieve reliable main-circuit design and increased power density.