which one

[john-china]

i want build a big zen amplifier , but i dont like parralling mosfet,
so i must use only one big mosfet which can survive in 100w heat dissipation. which mosfet can do this job with normal Al. heatsink.

[hifimaker]

You might consider using an IRF250. It will handle a lot more power, but getting to 100w one a single device would be a struggle.

I'm assuming you're talking about 100 watts of total dissapation rather then class A output power.

-David

[MikeW]

Do the calculations


http://www.fairchildsemi.com/ds/HU/HUF75652G3.pdf

[Nelson Pass]

Originally posted by dw8083
You might consider using an IRF250. It will handle a lot more power, but getting to 100w one a single device would be a struggle.

Yes, you will recall that we were giving out flats of them at BAF 07

[Magura]

Originally posted by john-china
i want build a big zen amplifier , but i dont like parralling mosfet,
so i must use only one big mosfet which can survive in 100w heat dissipation. which mosfet can do this job with normal Al. heatsink.

100W dissipation is not too hard on a regular TO-247 device, though if you want to push the limits, you could look uo some TO-264 devices. I know Onsemi makes some.

Magura

[steenoe]

Originally posted by Magura


100W dissipation is not too hard on a regular TO-247 device, though if you want to push the limits, you could look uo some TO-264 devices. I know Onsemi makes some.

Magura

Oh, Mr Magura, not everybody has heatsinks like yours or mine... gettin' a 100 watt's worth of heat out of a TO247 is not easy, nor will it ever be I would rate the task: "Hard to achieve" But I am just a stupid amp-builder....he-he...
The OnSemi's has a big big Ciss value, so they kind of suc# for the purpose on hand....

[john-china]

Originally posted by steenoe



Oh, Mr Magura, not everybody has heatsinks like yours or mine... gettin' a 100 watt's worth of heat out of a TO247 is not easy, nor will it ever be I would rate the task: "Hard to achieve" But I am just a stupid amp-builder....he-he...
The OnSemi's has a big big Ciss value, so they kind of suc# for the purpose on hand....

i dont worry about heatsink , because i have some big heatsinks that can dissipate 100w . i dont know if irfp250 can dissipate 100w and how long it can last.
i know it is important to mount one mosfet on the heatsink when make it to dissipate 100w. what will i consider to take care of it?
i saw big mosfet (to264 and to247) on internet , but i dont know if they match linear application. so ask somebody to tell me which one is available for a amplifier.

[john-china]

Originally posted by Nelson Pass


Yes, you will recall that we were giving out flats of them at BAF 07

what is it ? details , pls

[Magura]

Originally posted by Nelson Pass


Yes, you will recall that we were giving out flats of them at BAF 07

Originally posted by john-china



what is it ? details , pls

How many do you need?

If we are talking just a few (like2 pcs.) drop me a line and I'll send them to you. The reason I as if it's just a few is not that you can't have more than 2, but the fact that shipping more to china will be rather expensive.

Magura

[Magura]

and the datasheet:

http://www.google.dk/url?sa=t&ct=res...0DmGHpFIro6bKw

Magura