The EVDD404 evaluation board is a general-purpose circuit board designed to simplify the evaluation of the IXYS IXDD404, IXDI404 and IXDN404 gate drive ICs, as well as to provide a building block for power circuit development. Either the DIP-8 (PI) or SO-16 (SI-16) gate driver package types may be installed in the driver (the DIP-8 package is factory installed). The board enables the user to drive MOSFETs or IGBTs in TO-220, TO-247, TO-264 or SOT-227 packages. The evaluation board design allows these MOSFETS to be attached to a heat sink, and in so doing the board assembly can be used as a ground referenced, low side power switch for both single-ended and push-pull configurations. Circuitry for the Tri-State function is included on the evaluation board.