Schottky Diode Help

[rukiddingme]

I'm gonna piggy back some more questions on this thread.

I have seen many people bundle multiple diodes in parallel. I am under the impression that this does not decrease the forward voltage drop, but does give the bundle the ability carry a higher current. Is this the correct situation with a diode bundle?

Is there any down side to creating bundles of diodes for a full wave bridge.

Is there no benefit of a diode bundle if a single diode is rated for the voltage and current?

Is there any benefit to using diodes very close to the actual voltage and current of the circuit, or is any diode above the volts and current just as good?

[kooler]

Yep, the RK44 looks like exactly what I want. I'm at 10 -15 volts so I don't need 100 volts. Where did you see the forward drop spec for the RK44?

http://www.datasheetarchive.com/pdf-datasheets/Datasheets-29/DSA-574476.pdf

look at the second chart on the first row.. it shows the forward volts at the needed forward current

robbie

[rukiddingme]

http://www.datasheetarchive.com/pdf-datasheets/Datasheets-29/DSA-574476.pdf

look at the second chart on the first row.. it shows the forward volts at the needed forward current

robbie

Am I reading the data sheet right to say, maximum volts 30, voltage loss at 1-3 amps is .55?

Do I have to worry about a minimum voltage and what would that be?

[blueplanet]

You need a germanium schottky, not a silicon schottky.

[mscoffman]

Am I reading the data sheet right to say, maximum volts 30, voltage loss at 1-3 amps is .55?

Do I have to worry about a minimum voltage and what would that be?

Using kooler's (above) data sheet.

Look at: VFâ€"IF Characteristics (Typical) chart.
(forward voltage vs. forward current)

At the forward voltage of .2Vdc you should be able to draw
(only) 200ma through the diode, even into a short circuit.
The higher the forward voltage the more current can be
drawn. If your load has a characteristic impedance different
from zero    then the amount will be less. The .55 drop
is the worst case for any valid voltage and current and for
any operational diode. This is a real component, so you
have to leave the "perfect" operational models behind
and use the charts.

:S:MarkSCoffman