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mosfet blocking diode

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LAN_403

IamSmooth

Sat May 08 2010, 06:40AM

Registered Member #190 Joined: Fri Feb 17 2006, 12:00AM
Location:
Posts: 1567

Does it matter, other than for very fast switching speeds, if the blocking diode is a schottky or ultrafast diode?

Schottky's only can block 30-50v, while an ultrafast diode can go much higher. If this is the case, why is the greater part of the voltage drop across the source-drain of the mosfet instead of the blocking diode?

wylie

Sat May 08 2010, 05:33PM

Registered Member #882 Joined: Sat Jul 07 2007, 04:32AM
Location:
Posts: 103

Didn't this get covered in the FET Vs IGBT thread a few days ago?

Re-Read The Master (scroll down to the "Beware the MOSFET body-diode !" section. Where's the html anchors richie?!

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