200 Watt Lateral Mosfet Amplifier and irfp240/9240 (segue) - diyAudio
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Old 15th April 2003, 01:01 PM   #1
tino96 is offline tino96  Italy
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Default 200 Watt Lateral Mosfet Amplifier and irfp240/9240 (segue)

My excuse to all for resart the thread but my browser is not be able to reply the old thread;


hi. many tnx to all;
I'm talking about the Hitachi 50w to 200w Lateral MOSFET Amplifier
(http://www.aussieamplifiers.com/downloads/chepamp.pdf)

the mosamp8 is the Symmetrical 400 Watt Amplifier
(http://www.aussieamplifiers.com/downloads/symamp.pdf) and is too power for my Transformer 300VA;
I have some Fairchild's IRFP240 an IRFP9240 plastic case and no irf240 (TO3).
If is not possible to adapt my devices, someone have a good schematic?


....and PCB
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Old 15th April 2003, 02:35 PM   #2
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I have the 400 watt symmetrical amp underway here and I have irfp240's and 9240s...so I hope they work w/o any mods. I was under the impression that they were fine w/o mods. The hitachi, now that I'm not sure of, but good luck w/ that if you do it!

-Matthew K. Olson
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Old 15th April 2003, 02:45 PM   #3
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From the "Postscript Notes" in Hitachi 50w to 200w Lateral MOSFET Amplifier
(http://www.aussieamplifiers.com/downloads/chepamp.pdf):

Please donít attempt to use any IRFP240 or IRFP9240 devices in this design, It simply wonít
work and you will blow up the output stage in seconds after turn on. This design is only
suitable for Lateral type Power MOSFETís
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Old 15th April 2003, 05:13 PM   #4
HighTec is offline HighTec  Croatia
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Post Good amp

Hi Tino96.

Here is a link.I think there is something usefull for you.Instead of one pair IRFP244 put two pairs of IRFP240.Take a little peak over here:

http://users.bigpond.net.au/mefinnis...abs/aleph4.htm

Regards.
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Old 16th April 2003, 12:59 AM   #5
Diode is offline Diode  United States
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Hey Americans,

Where do we get IRFP240 and IRFP9240 FETs here without buying them in bulk and how much are they?

Please help,

Chris
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Old 16th April 2003, 01:09 AM   #6
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Thylantar posted that the best place to get me is

www.future-active.com ( I think there is a hyphen in there)

the place is 1/2 as cheap as digikey!!!! Check it out. I haven't ordered from them yet, but I will if I need more irfp240's!!

-Matthew K. Olson
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Old 16th April 2003, 04:17 AM   #7
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Exclamation You would be VERY brave to ignore this !!!

Quote:
Direct from Anthony's notes:
Also Other Hitachi Power MOSFETís can be used in the Output stage this design, such as 2SK1058 and 2SJ162.
Please donít attempt to use any IRFP240 or IRFP9240 devices in this design, It simply wonít work and you will blow up the output stage in seconds after turn on. This design is only suitable for Lateral type Power MOSFETís
Exicon make an "almost equivalent":

http://www.altronics.com.au/cat.asp?...p=104&id=Z1450

See their website:

http://www.exicon.com/

Cheers
Mark
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Old 16th April 2003, 05:10 AM   #8
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Default My version of the Lateral Amp

Tino96,

You requested a deisgn based on Anthony Holton's Lateral FET amp. Here is my take at it. I used his design as a starting point and then went a little further. This is an amplifier for a bass guitar and will be powered from +/- 60V rails. I use IRFP240/9240 devices in this. I will be finishing up with the PCB design within the next 2 weeks. Depending on the reaction, I may post the gerbers for the PCB.

Matto5,

Check the previous thread for my link to the updated schematic on Anthony Holton's site for the 400W symmetrical amp. He suggests the modifications if you are going to use the IRFP240/9240 pairs.

Sean
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File Type: zip bass amp2.zip (13.6 KB, 2247 views)
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Old 16th April 2003, 11:27 AM   #9
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Sean, I just went to his site and his "latest" update ...the revised board AFTER the link you showed is the one that is compensated for the irfp240 devices AND his boards reflect this. Should be drop in.

Check the POWER AMPLIFIERS section and go to the SYMETRICAL AMP section...you'll see that the new new schematic is compatable w/ irfp240's and those are the boards that he's shipping now. Later!

-Matthew K. Olson
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Old 16th April 2003, 11:29 AM   #10
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PS...sean...I'd love to see the layout for that PCB. How many devices are you using? I'm adding a couple extra to my 400 watt boards. I have 1kva toroids for the thing at 70v rails so ...might as well add a couple more devices. Later!

-Matthew K. Olson
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