Cooler-running isolated rectifier-IGBT modules

9 April 2003 Power Electronics / Power Management Integrated Solutions

The MTP Switch family of isolated modules from International Rectifier are insulated with a ceramic aluminium nitride layer for improved junction-to-case thermal resistance. The insulation layer enables as much as seven times better thermal conductivity (cooling capability) than alumina substrates generally used. The new 600 V and 1200 V-rated modules combine high-speed IGBTs with optimised diodes to form single-package, space and assembly cost saving alternatives to discrete solutions. They are designed for high current industrial power supplies used in high frequency arc welding machines and UPSs.

The 50MT060ULS is a fully-insulated low-side chopper module, made with IR's ultrafast IGBT and a HEXFRED diode with ultrasoft reverse recovery current.

The 50MT060WH is a fully-insulated half-bridge module built with a pair of IR's WARP Speed IGBTs in parallel and a HEXFRED freewheeling diode with UltraSoft reverse recovery current characteristics. This double-IGBT layout enables efficient power dissipation and current sharing.

Two additional MTP Switch modules are available, with 1200 V ratings. The fully-insulated 20MT120UF full-bridge and the 40MT120UH half-bridge modules host 1200 V-rated IGBTs. The 1200 V devices can be directly connected to the DC bus in the majority of three-phase systems. The half-bridge module is available with on-board temperature monitoring.

For more information contact Avnet Kopp, 011 809 6100, sales@avnet.co.za, www.avnet.co.za

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