Mhz 10W Thyristor?

LowQCab

Joined Nov 6, 2012
2,309
An SCR or Triac, is either "On" or "Off",
and You don't get to choose when it turns "Off".

This would make a very poor "Current-Regulator".

In order to get help with how to achieve your ends,
You need to state the end result that You want,
and what You have to work with,
and all of the other particulars in-between.

Asking if an unusual solution might work,
with no other information provided,
won't, (can't), get You any answers to your problem.
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Ian0

Joined Aug 7, 2020
5,816

LowQCab

Joined Nov 6, 2012
2,309
We still don't know what you're trying to accomplish.
Control the Current from what ?
Control the Current to what.
How much Current are we talking about ?, at what Voltage ?
Why does the Current need to be controlled ?
Will the Current-Control be a fixed value ?,
or manually adjustable ?,
or controlled by some other outside signal ?
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Thread Starter

johnyradio

Joined Oct 26, 2012
288
An SCR or Triac, is either "On" or "Off",
and You don't get to choose when it turns "Off".
This would make a very poor "Current-Regulator".
I suggest you read the article i linked in my first post, on thyristor-controlled rectifiers.
We still don't know what you're trying to accomplish. Control the Current from what ?
i believe i mentioned it.
Control the Current to what.
To a load. Perhaps we're charging a super-capacitor, or powering a motor or LED. I'm skeptical that it matters.
How much Current are we talking about ?, at what Voltage ?
as i mentioned, 10 watts. Let's say 2A at 5W. A max range would be 1A to 4A, at 5V to 10V.
Why does the Current need to be controlled ?
I believe that's irrelevant. There are myriad applications requiring current control. Assume we're charging a super-cap
Will the Current-Control be a fixed value ?,
or manually adjustable ?,
or controlled by some other outside signal ?
This thread concerns thyristor-controlled rectifiers, so it would be switched.
 

LowQCab

Joined Nov 6, 2012
2,309
"" I believe that's irrelevant. ""
Well I suppose that's your privilege.

The answer to your question is "no",
an SCR or Triac will not do what You want,
not even remotely close.

They are a crude, and very cheap, means of controlling low frequency AC-Loads,
they work well in only a very limited number of applications.

There is virtually no application that they are used for
that doesn't have 2 or 3 far superior ways of controlling Power,
but SCRs and Triacs are dirt-cheap and practically bullet-proof,
so they get used a lot,
especially when low cost of manufacturing is a priority.
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