0
As a rule, NO!
The main reason is thermal runaway:
When you warm up a diode, its "conductance" at any particular voltage increases.
(The Shockley diode equation gives the exact equation).
Even with two identical diodes in parallel, if the temperature of one diode was even slightly hotter than the other diode, more of the current would go through the hotter one. The one with more current would heat up more rapidly, lowering its conductance even more, and after a short time the hotter diode is hogging most of the current.
The final effect is that a diode will carry almost all the current, while the other stays almost unused.
There are a variety of things that cause two diodes to *not* be identical, which only speeds up the thermal runaway.
*the unavoidable imbalance between the two diodes voltage drops.
*(with an AC signal): the diode with slightly faster turn-on time will absorb more turn-on loss
*(with an AC signal): the diode with slightly slower turn-off time will absorb more turn-off loss
There is an obvious exception: use identical diodes, with exactly the same electrical and themal chracteristics. Individually selected diodes with voltage drop matched to less that one mV, and carefully assembled for thermal matching, may carry the same current, so effectively double the rating.
It is a very unstable condition, like keeping a coin vertical on a table.
Another arrangement is to add current sharing resistors in series to each diode, at least 0.3/0.4 V of additional voltage drop is required, so is a very unefficient solution.
Considering high frequency signals (as in switching power supply) adds even more problems, so the answer is always: use just one diode, leave the task of paralleling only to very skilled people dealing with such high currents that no single diode in the market can withstand.
What else can I help you with?
What electronics are diodes used in?
in order to let the current pass in one direction.
What did Pelias order Jason to do?
obtain the golden fleece
What were provisions were you required to meet in order to obtain your citizenship in the 1800s in the US?
the citizenship 4523
How do you stop child support payments and sign over rights in Ontario?
You obtain an approved order from the court.
How do you obtain a court order title in Indiana?
Call attorney mike lipsky 574 387 4744 he will do all work for you
What electronics are diodes used in?
in order to let the current pass in one direction.
Do you have to complete a level with a skull in order to obtain it?
No, once you obtain it, you unlock it.
Do you have to take a test in order to obtain your license?
Yes, you typically need to pass a test in order to obtain a license.
Do I need both parents to be present in order to obtain a passport?
No, you do not need both parents to be present in order to obtain a passport.
Do you have to take a written test in order to obtain your license?
Yes, in order to obtain your license, you typically have to take a written test.
Does a child have to be present in order to obtain a passport?
No, a child does not have to be present to obtain a passport.
In what order do you obtain your degrees?
Typically, you obtain your degrees in the following order: bachelor's degree, followed by a master's degree, and then a doctoral degree.
The alphabetical order for obtain, observe,oblige, obedient?
obedient , oblige , observe , obtain
Where can I obtain a copy of my child support order?
You can obtain a copy of your child support order from the court that issued the order. Contact the court clerk's office for assistance in obtaining a copy.
What type of diodes are used in bridge rectifier?
Mainly diodes that handle a fair amount of power. When diodes are constructed in a "bridge", it usually means someone is trying to rectify AC to DC voltage in what is considered a "full wave". Both sides of the sine wave + and - are utilized to change the AC current into DC. Typically power diodes are used in this fashion. Crystal diodes or other types will not work in a bridge circuit as they cannot handle the amperage or wattage that typically is wanted. Power diodes are usually ones that handle 1 amp or more of current. Some power diodes can handle 60 amps or more if properly constructed in a heat sink dependent upon their ratings.
Why the laser diode biased forwared biased?
i think in order to population inversion in depletion region. also the laser diodes must be degenerated.
What must organisms be able to obtain in order to surive?
They must obtain food,shelter,and water
