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Fault detecting IGBT/MOSFET driver

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kappa_am

kappa_am

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Could you please introduce me some driver that has short circuit and open circuit fault detector?
I mean when switch falls short circuit or open circuit drive generates a fault signal.

Thank you
 

Short circuit detection isn't rare, but I've never seen one with an open circuit detector, because generally an open circuit isn't considered a "fault." In fact some loads will have moments of zero current which shouldn't be considered a fault.
 

cannot desaturation detection perform as open circuit detector?
you're right;to avoid short circuit, there is usually a tiny interval between firing complementary switches. However, I think desaturation detection can act as open circuit detector which will be helpful for my design.
I would be grateful if you give me ur opinion.
 

What do you exactly mean with open circuit? Disconnected load or non-operational power switch? The latter will be determined by desaturation detector, the former won't.
 

Hi, I mean non-operational power switch.
I had guessed so. Thank you
 

Hi,

What switching frequency?
Is it just high side or lowside, or bridged?

How fast do you want to detect the state?

What voltage / current rating do you expect? ...just for better understanding. A little description could clarify..

Klaus
 

Just try to goolge SMPS. They recently have fault error and self diagnosis possibility.
 

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