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.