Hello

Are there any diodes available in the market that are better than the conventional ones. FOr eg, the commercially avaialble diodes have a drop of 0.3 volts. Are there any diodes available that have a much lesser voltage drop.

Thanks

 

What sort of forward voltage drop are you requiring?

It is usually Germanium diodes that have a voltage drop of about 0.3V and I have heard of some having forward voltage drops of down to 0.2V. However, it is primarily material dependant.

Dave

 

Ordinary
http://www.kpsec.freeuk.com/components/diode.htm

An exotic MOS one. They make a difference in SMPS supplies.
http://powerelectronics.com/power_semiconductors/vishay_tmbs_voltage/
http://www.vishay.com/docs/88926/vts401ct.pdf

Vishay has a nice selection of diodes.

 

I'm using BAT754 Schottky diodes, which have a forward voltage drop of 0.2V (at very small currents only). I've not come across anything better than that.

 

I'm using BAT754 Schottky diodes, which have a forward voltage drop of 0.2V (at very small currents only). I've not come across anything better than that.

What are you using them for? There are feedback circuits (and feed-forward circuits) that, in some applications, can reduce the forward drop to essentially zero.

 

Ordinary
http://www.kpsec.freeuk.com/components/diode.htm

An exotic MOS one. They make a difference in SMPS supplies.
http://powerelectronics.com/power_semiconductors/vishay_tmbs_voltage/
http://www.vishay.com/docs/88926/vts401ct.pdf

Vishay has a nice selection of diodes.

Edited because my question makes no sense.

Dave

 

What are you using them for? There are feedback circuits (and feed-forward circuits) that, in some applications, can reduce the forward drop to essentially zero.

Protection circuits for chips where the inputs can't go below -0.3V. I'd be very interested to hear about that though.

So I'm correct in my assumption that for a traditional two-terminal diode that we can only get down to 0.2V forward voltage typically using Germanium, however can get down into the regions of 100's of mV using MOS technology?

"100's of mV" >= 0.2V

 

"100's of mV" >= 0.2V

Ignore my stupidity! I was thinking that the MOS technology had forward voltages in the region of 100's of micro-volts. As it happens I can't read or type.

Dave