What do you think of these lateral FETs?

GregH2 · 02:01 PM

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

Anyone tried them?

Thoughts appreciated!

Greg.

George61 · 30th April 2011, 01:05 AM

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.

djk · 30th April 2011, 01:33 AM

Hafler used them in the late 80s, they worked fine.

GregH2 · 30th April 2011, 02:34 PM

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.

GregH2 · 30th April 2011, 03:53 PM

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?

jacco vermeulen · 30th April 2011, 04:09 PM

Hmm, interesting.

Maybe you should try to read the datasheets again.
(might even compare them with those of BUZ900/901/905/906)

GregH2 · 04:21 PM

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.

jacco vermeulen · 30th April 2011, 04:22 PM

Ciss -Crss

GregH2 · 30th April 2011, 04:27 PM

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.

jacco vermeulen · 30th April 2011, 05:58 PM

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.

29th April 2011, 01:58 PM	#1
GregH2 diyAudio Member Join Date: Oct 2009	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 02:01 PM.

30th April 2011, 01:33 AM	#3
djk diyAudio Member Join Date: Feb 2001 Location: USA	Hafler used them in the late 80s, they worked fine. __________________ Candidates for the Darwin Award should not read this author.

30th April 2011, 04:09 PM	#6
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	Hmm, interesting. Maybe you should try to read the datasheets again. (might even compare them with those of BUZ900/901/905/906) __________________ Looks like Sponge Bob has killed another thread.

30th April 2011, 04:18 PM	#7
GregH2 diyAudio Member Join Date: Oct 2009	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 04:21 PM.

30th April 2011, 04:22 PM	#8
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	Ciss -Crss __________________ Looks like Sponge Bob has killed another thread.


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30th April 2011, 01:05 AM	#2
George61 diyAudio Member Join Date: Apr 2011 Location: York Haven, Pennsylvania	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.

30th April 2011, 02:34 PM	#4
GregH2 diyAudio Member Join Date: Oct 2009	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.

30th April 2011, 03:53 PM	#5
GregH2 diyAudio Member Join Date: Oct 2009	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?

30th April 2011, 04:27 PM	#9
GregH2 diyAudio Member Join Date: Oct 2009	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.

30th April 2011, 05:58 PM	#10
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	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. __________________ Looks like Sponge Bob has killed another thread.

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