more words has spend about a mached mosfet, but the capacitance of gate is than more important in audio responce?
it' very easy mount a irfp250 in to247, the to3 case need too much drill-wole.....
what thing about???
it' very easy mount a irfp250 in to247, the to3 case need too much drill-wole.....
what thing about???
You could try the IRFP240, its a TO-247 package. I could be wrong here but I believe you could use say 10 pairs of outputs vs. the original 12, to offset gate capacitance issues.
-john
-john
the question is:
12 pair of IRF240 in to3 case as output stage is similar to mount 12 pair of IRFP250, the gate capacitances has a limit in aleph1.2?
anyone has tested or listed a differences?
thanks
12 pair of IRF240 in to3 case as output stage is similar to mount 12 pair of IRFP250, the gate capacitances has a limit in aleph1.2?
anyone has tested or listed a differences?
thanks
I am not looking at a datasheet but I thought the IRFx250 was a bigger die than the IRFx240. Higher curent AND higher capacitance. Maybe you could get away with using less of them. This is only from memory .
have right, irfp have more gate capacitance, but are more easy to mount. was wondering for how much current and then how much make out can pilot with the first stadium of aleph1.
sorry for my english
sorry for my english
There's more to it than just Gate capacitance and current capability. You need to keep an eye on the power dissipation.
Also, don't immediately assume that lower Gate capacitance is always better. It depends on the circuit and the application.
Grey
Also, don't immediately assume that lower Gate capacitance is always better. It depends on the circuit and the application.
Grey
but sharpen she makes out minor should extend the band and the answer of the pilot stadium, and not to load the driver but to give back the whole possible linear piu frequency range.
I would like to avoid mounting 48 metal irf240 in to3, while I can choose to mount the same number of irfp250 to their place in to247, with remarkable advantages in terms of assembly and current, but not in make out of gates, while he remains the doubt of as it can worsen the sound of all the amplifier.
evaluates that all the amplifier assumes remarkable dimensions, a lot of to be become a monolith arranged in the lounge.
the measurements correct in cm are 160 high, 24 narrow, 40 deep, and higher than 40kg of weight, even if of wood and dark a remarkable visual impact always has.
evaluates that all the amplifier assumes remarkable dimensions, a lot of to be become a monolith arranged in the lounge.
the measurements correct in cm are 160 high, 24 narrow, 40 deep, and higher than 40kg of weight, even if of wood and dark a remarkable visual impact always has.
It also took me a while to understand what the issue might be.
According to IRF website, IRFP240, which is TO247 plastic package, is now obsolete. The next closest in TO247 is indeed the IRFP250.
IRF240 (without P), which is TO3 metal can, is still active.
But I think if you are quick enough, you can still get enough IRFP240 in TO247 on the market, e.g.
www.reichelt.de
www.schuro.de
etc.
Patrick
According to IRF website, IRFP240, which is TO247 plastic package, is now obsolete. The next closest in TO247 is indeed the IRFP250.
IRF240 (without P), which is TO3 metal can, is still active.
But I think if you are quick enough, you can still get enough IRFP240 in TO247 on the market, e.g.
www.reichelt.de
www.schuro.de
etc.
Patrick
about shuro i tryed to write them for some information but never got back from them.
How is it possible to contact them?
Since the website is not in english but only in german and not understandable for me i would need support.
Do you know if they have another email address where they usually answer?
I wrote to this address:
info@schuro.de
How is it possible to contact them?
Since the website is not in english but only in german and not understandable for me i would need support.
Do you know if they have another email address where they usually answer?
I wrote to this address:
info@schuro.de
I use the same address, and they are not reachable by phone.
Maybe you should try Reichelt, but it is also in German.
Someone also posted a link for matched devices from America, but I don't have it off hand. Please search.
Patrick
Maybe you should try Reichelt, but it is also in German.
Someone also posted a link for matched devices from America, but I don't have it off hand. Please search.
Patrick
Yes, but not always immediately.
You can call Reichelt Order Hotline at ++49 4422 955333 and see whether they speak English.
Minimum overseas order is 150 Euros.
Patrick
You can call Reichelt Order Hotline at ++49 4422 955333 and see whether they speak English.
Minimum overseas order is 150 Euros.
Patrick
EUVL said:
There are two factors in play:
--The IRFP240 hasn't been discontinued. It's in transition to a lead free part with a PBF suffix.
--Vishay is in the process of acquiring some, but not all, of the IRF parts. That happens to include the IRFP240. I'm not clear on what the parts nomenclature will be once the dust settles, but as near as I can tell at this point, they will be branded Vishay, not IRF.
Grey
IRFP240 available
IRFP240 is still available from Allied Electronics (about 150):
http://www.alliedelec.com/
There is no min. charge and they only charge the actual postage for shipping. Even better, they ship Canadian orders from their Canadian office, that means a saving of custom clearance charges. (That is my experience in Canada, not sure if this applies to Europe.)
It seems IRFP240, 244 and 250 are all obsolete. Does anybody know what is going on, any new products to replace these items?
IRFP240 is still available from Allied Electronics (about 150):
http://www.alliedelec.com/
There is no min. charge and they only charge the actual postage for shipping. Even better, they ship Canadian orders from their Canadian office, that means a saving of custom clearance charges. (That is my experience in Canada, not sure if this applies to Europe.)
It seems IRFP240, 244 and 250 are all obsolete. Does anybody know what is going on, any new products to replace these items?
The IRFP250 has about twice the gate capacitance of the IRF240.
It also has a slightly higher gate voltage to turn it on.
Personally I think 150 watts is more than enough to dissipate in that package so I stick to the IRFP240 in multiples.
The chip of the 250 acts like two of the 240's in parallel, so
you can use them, and use fewer of them. I would go from
12 to 8, or 8 to 6 devices as an example.
😎
you can use them, and use fewer of them. I would go from
12 to 8, or 8 to 6 devices as an example.
😎
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