Hi!
Anyone who knows more about SAPM01, temperature compensated MOSFET's for audio?
150 V, 20 A, 150 W
Anyone who knows more about SAPM01, temperature compensated MOSFET's for audio?
150 V, 20 A, 150 W
Why can't they release datasheets like everybody else? Some firms release them very early in order to get attention. Cirrus for example.
I guess you can contact the distributor in your area and ask them for a preliminary datasheet.
But then, why are you so eager to get them? My guess is thay are much more expensive than any other "audio" MOSFET and still won't sound better.
But then, why are you so eager to get them? My guess is thay are much more expensive than any other "audio" MOSFET and still won't sound better.
They cost 3.11 Euro in single quantity. Hardly very expensive.
Funny that they seem available but the datasheets not.
http://www.profusionplc.com/scripts/wsisa.dll/pcatlst?ipartno=all&imanuf=sanken&itypes=all
Funny that they seem available but the datasheets not.
http://www.profusionplc.com/scripts/wsisa.dll/pcatlst?ipartno=all&imanuf=sanken&itypes=all
AMT-freak said:
Sure, but they are not equivalent products, and the price is still
reasonable I think.
It's very easy to temperature compensate a complementary set of Power MOSFET's like IRFP240 / IRFP9240.
You can either use:
1..A small MOSFET like IRFP614I with 2 resistors and a trimmer on the gates, much like a normal BIAS transistor in a bipolar output stage, or :
2..exploit the fact that the derating factor of an IRFP is roughly the same as a normal Vbe (2,2 mV / K). Use a constant voltage source, and a Vbe doubler with a bipolar transistor (2N2222 or BC548) and you'll be all set!
These devices are great fun to build with, but their Rs varies a great deal with load, so you must find a way to compensate for that in your amplifier circuit. (if you want good sound - preferably without feedback loops).
You can either use:
1..A small MOSFET like IRFP614I with 2 resistors and a trimmer on the gates, much like a normal BIAS transistor in a bipolar output stage, or :
2..exploit the fact that the derating factor of an IRFP is roughly the same as a normal Vbe (2,2 mV / K). Use a constant voltage source, and a Vbe doubler with a bipolar transistor (2N2222 or BC548) and you'll be all set!
These devices are great fun to build with, but their Rs varies a great deal with load, so you must find a way to compensate for that in your amplifier circuit. (if you want good sound - preferably without feedback loops).
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