Scope and purpose

This document introduces a complete Infineon Technologies AG system solution for a 3300 W bi-directional

DC-DC converter that achieves 98 percent efficiency in buck mode and 97 percent in boost mode. The

EVAL_3K3W_BIDI_PSFB board is a DC-DC stage with telecom-level output realized by a Phase-Shift Full-Bridge

(PSFB) topology block with bi-directional capability.

This document shows the board using CoolMOS™ CFD7 and OptiMOS™ 5 in a full SMD solution with an

innovative cooling concept.

The Infineon components used in the 3300 W bi-directional PSFB are:

 600 V CoolMOS™ CFD7 superjunction (SJ) MOSFET

 150 V OptiMOS™ 5 Synchronous Rectifier (SR) MOSFET

 2EDS8265H safety isolated and 2EDF7275F functional isolated gate drivers (EiceDRIVER™)

 XMC4200-F64k256AB microcontroller

 ICE5QSAG CoolSET™ Quasi Resonant (QR) flyback controller

 800 V CoolMOS™ P7 Superjunction (SJ) MOSFET

 CoolSiC™ Schottky diode 650 V G6 (IDH08G65C6)

 Medium-power Schottky diode BAT165

 IFX91041EJV33 DC-DC step-down voltage regulator