schotty diode

Discussion in 'General Electronics Chat' started by ect_09, Sep 4, 2014.

  1. ect_09

    Thread Starter Member

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

    Well-Known Member

    Dec 13, 2013
    it will take much more to conduct.
  3. ian field

    Distinguished Member

    Oct 27, 2012
    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.