Hi all,

My circuit has a capacitor discharging through a bunch of LEDs, with a peak current of ~150A over 5 ms (max 0.5% duty cycle). I'd like to use a FET or IGBT to switch the circuit and control pulse time, which will vary between 1ms and 5ms.

I would like to minimize Rds voltage/resistance, with an on/off switching time in the range of tens of microseconds. Can anyone recommend a FET or IGBT that might be suitable for this application?

 

You don't state the voltage, but here is a 100 volt one.
http://www.irf.com/product-info/datasheets/data/irfp4468pbf.pdf
Watch your eyes!

 

I vote IGBT.

 

IGBT's have a much higher ON voltage then a MOSFET so, unless the voltage exceeds those available, I recommend a MOSFET.

 

Thanks all for your input, forgot to state the cap voltage, it's 50V. That IR part might to the trick, will take a closer look, thanks ronv.

 

wow excellent, that part has a very low Vds and Rds, almost negligible. Do you have any circuit/IC recommendations to help an AT90PWM3B drive it?