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Old 20th May 2014, 08:09 AM   #1
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Default 2sk1058 or Exicon lateral mosfets?

I have a choice to choose either 2sk1058 or Exicon lateral mosfets.
Which one will be best to use for higher bias class A application preferably at 22V 1Amp bias per fet or at 32V .6 bias per fet.

Im just considering the best sound quality so which one to choose?

the cob of the 2sk1058 is lower than the exicons so what about the other parameters to be considered?
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Old 20th May 2014, 01:38 PM   #2
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just checked with the Renesas Distributor today and they said the 2sk1058 is going to EOL and hence recommending the
2SK2220 | Renesas Electronics Singapore

Is the above mosfet better?
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Old 20th May 2014, 01:55 PM   #3
AndrewT is offline AndrewT  Scotland
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Have you compared all the different datasheets for these Lateral mosFETs?

They are almost identical. Even the original Hitachi To3 2sk135/j50 are the same.
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Old 20th May 2014, 04:06 PM   #4
Bigun is offline Bigun  Canada
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Quote:
Originally Posted by rhythmsandy View Post
Interesting - the 2SK2220 data sheet was issues nearly 10 years ago it'self so this doesn't bode well.
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Old 20th May 2014, 04:28 PM   #5
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What about the capacitances?
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Old 20th May 2014, 04:37 PM   #6
Zero D is offline Zero D  United Kingdom
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Quote:
Originally Posted by Bigun

so this doesn't bode well.
In more ways than 1
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Old 20th May 2014, 04:50 PM   #7
Bigun is offline Bigun  Canada
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Quote:
Originally Posted by Zero D View Post
In more ways than 1
those kind of jokes should be illegal!
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Old 20th May 2014, 06:17 PM   #8
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by Bigun View Post
Interesting - the 2SK2220 data sheet was issues nearly 10 years ago it'self so this doesn't bode well.
Quote:
Originally Posted by Zero D View Post
In more ways than 1
Quote:
Originally Posted by Bigun View Post
those kind of jokes should be illegal!
I'm a bit more than slow.
It took two readings for the subtlety to sink in.
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Old 20th May 2014, 07:47 PM   #9
Zero D is offline Zero D  United Kingdom
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@ AndrewT

Well @ least you got it now
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Old 20th May 2014, 07:56 PM   #10
AMV8 is offline AMV8  United Kingdom
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I have used Hitachi, Exicon and other mosfets in a number of amps. If it helps you I find that the Exicon mosfets are the best sounding ones around today.

However if you can find some in an old amp, I find the Hitachi mosfets still produce the clearest sound across the whole spectrum form bass to treble. The Exicon mosfets are very close.

I am not sure why this is as the specs all seem very similar. I suspect that the Hitachi specs were more conservative then other companies specs.

The only difference I have found between the mosfets from different companies when testing mosfets is in the Threshold voltages. The Hitachi mosfets had very close matching on Gate Threshold voltage, to within 0.03v, on mosfets with the same batch number. Exicon and other makes show a wider gate threshold voltage variation of 0.35v between mosfets from the same batch.
Also, if it helps you, I find that the output mosfets seem to benefit from a driver stage with a higher current capability than you would expect and from using VAS and driver transistors with low capacitance.
Don
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