schotty diode

Thread Starter

ect_09

Joined May 6, 2012
180
can i use schottky diode in reverse bias for fast switching application ??
what will be its performance in reverse biasing???
 

ian field

Joined Oct 27, 2012
6,536
can i use schottky diode in reverse bias for fast switching application ??
what will be its performance in reverse biasing???
Shottky-barrier diodes are for fast switching, they have lower forward drop volt drop - can be as low as 0.2V for a high current type, as opposed to around 0.7V for regular silicon.

They test as having significant reverse leakage, but I've never seen that pose a problem in practical applications. They do however have restrictive reverse voltage ratings, probably 60V is the highest in common use, you can get up to 90V and beyond - at a price.

Junction capacitance is usually higher - this usually needs to be padded out on the reservoir cap on psu applications.

If you need fast - high voltage; look into silicon-carbide rectifiers. They're allegedly just as fast as SB, but the Vf is pretty large.
 
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