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Old 29th April 2011, 02:58 PM   #1
GregH2 is offline GregH2  Australia
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Default What do you think of these lateral FETs?

Lateral Mosfet (Click on the part numbers for specs and datasheet)

Anyone tried them?

Thoughts appreciated!

Greg.

Last edited by GregH2; 29th April 2011 at 03:01 PM.
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Old 30th April 2011, 02:05 AM   #2
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I used them to build an Elliott Sound Products P101 power amp and I am very happy with them. I am using two negative and two positive devices per channel on 70V rails. The amp has a considerable amount of power and is very neutral sounding, no coloration. The only down side is that they are no where near as a efficient as bipolar transistors.

The Exicons are basically clones of the old Hitachi 2SK1058 and 2SJ162 which were designed specifically for audio.

If you are interested in starting out with a high qualility, well designed, blank PCB check out Elliott Sound Products.
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Old 30th April 2011, 02:33 AM   #3
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Hafler used them in the late 80s, they worked fine.
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Old 30th April 2011, 03:34 PM   #4
GregH2 is offline GregH2  Australia
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Great, thanks for your replies.

George, glad to see the ESP amp lives up to expectations. I have read that article many times over trying to glean what I can.

Greg.
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Old 30th April 2011, 04:53 PM   #5
GregH2 is offline GregH2  Australia
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Hmm, interesting.

If the data sheets are correct and I'm interpreting them correctly, the input capacitances of the complementary ECX10xxxx devices are exactly the same, whereas the hitachi laterals have up to 50% difference. Seems these devices are a better match?
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Old 30th April 2011, 05:09 PM   #6
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Hmm, interesting.

Maybe you should try to read the datasheets again.
(might even compare them with those of BUZ900/901/905/906)
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Old 30th April 2011, 05:18 PM   #7
GregH2 is offline GregH2  Australia
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Ok, looked at them again and drew the same conclusion as before. What am I missing? Buz900/901 and 905/906 have different capacitances too. As do 2sk1058 and 2sj162.

Last edited by GregH2; 30th April 2011 at 05:21 PM.
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Old 30th April 2011, 05:22 PM   #8
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Ciss -Crss
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Old 30th April 2011, 05:27 PM   #9
GregH2 is offline GregH2  Australia
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I'm sorry, you're going to have to spell ths out for me. I'm obviously wrong but I don't know how or why. I barely know what these characteristics mean.
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Old 30th April 2011, 06:58 PM   #10
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There's : Cgs - Cgd - Cds

Crss (r of reverse ) = Cgd

Ciss (i of in) = Cgd + Cgs.
Or,...Ciss =Crss + Cgs

Coss (o of out) = Cgd + Cds.
Or,...Coss = Crss + Cds.

For the input capacitance, only Crss and Ciss count.
None of the lateral MOSFETs, original Hitachi or afterlifes have equal input capacitance for N- and P-channels.
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