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Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Hi, does anyone have an idea what would be the reverse recovery time of a TVS? We use them on the gates of power transistors in Tesla coils, switching very fast, but has anyone ever wondered about this? The datasheet doesn't say anything.
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Theyre pretty fast. ive seen numbers and been told theyre in the pico and nano second range, but as steve said capacitence can be a real killer and can skew any useful numbers. that may be why we dont see time quoted it text/datasheets too often.
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Patrick, the numbers you quote are probably for the reaction time in the reverse direction, but I have never seen the reverse recovery time of the actual diode stated. I measured the capacitance of a 12V 600W bidi TVS on my multimeter and it said 1.2nF. This is pretty good, but the recovery time is what bothers me.
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Dr. Dark Current wrote ...
Patrick, the numbers you quote are probably for the reaction time in the reverse direction, but I have never seen the reverse recovery time of the actual diode stated.
Well that may be, they're special devices, if i remember right theyre minority carrier devices, so a Trr may not even be possible to really know to a useful extent.
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TVS reverse recovery time
