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-   -   6000W By IRS2092 (http://www.diyaudio.com/forums/class-d/154244-6000w-irs2092.html)

JIMMEE 1st November 2009 02:39 AM

6000W By IRS2092
 
Who try to do?
:drool::drool::drool:
http://www.upload.in.th/index.php/fi...rs2092-6kw.pdf

theAnonymous1 1st November 2009 03:07 PM

1 Attachment(s)
Here is a JPG picture of the circuit since the PDF is too big to attach.

mgm2000ro 1st November 2009 05:32 PM

Max +/- V rail supply?
+/-200v Rail => 6000w ?

Pafi 1st November 2009 07:15 PM

IRFP4227 -> +/-100 V max!
6000W & 100 V peak: 0.8 ohm load impedance.

I would say: two of this in bridge are needed for real 6000 W (@ 2 ohms).

jleaman 1st November 2009 07:25 PM

200V rail's hope there is some serious protection in that amplifier, wouldn't want to see the SMOKE show it provided after it blows up :)

Andrew Eckhardt 1st November 2009 08:14 PM

Quote:

Originally Posted by Pafi (Post 1966993)
IRFP4227 -> +/-100 V max!
6000W & 100 V peak: 0.8 ohm load impedance.

I would say: two of this in bridge are needed for real 6000 W (@ 2 ohms).

6000 watts is the SBL rating. (Struck By Lightning).

mag 1st November 2009 08:28 PM

The mosfet driver totem pole BJTs are rated 80V so the
supply must be below +/- 80V.

Assuming the supply is 80V the maximum output power is 1600W on 2ohms
or 800W on 4ohm

Eva 1st November 2009 08:52 PM

Quote:

Originally Posted by mag (Post 1967053)
The mosfet driver totem pole BJTs are rated 80V so the
supply must be below +/- 80V.

Assuming the supply is 80V the maximum output power is 1600W on 2ohms
or 800W on 4ohm

The totem pole drivers have separate rails and are never subject to main supply voltage.

A full bridge is required to obtain 6KW on a not too low impedance with 200W MOSFET.

event horizon 1st November 2009 08:57 PM

Quote:

Originally Posted by mag (Post 1967053)
The mosfet driver totem pole BJTs are rated 80V so the
supply must be below +/- 80V.

Yuck, the driver transistors to the output mosfets are also operating in class B by quite a margin..0.65V each way :eek: Not very nice at all, some kind of bias to get them conducting & speed things up might help :)

Eva 1st November 2009 09:18 PM

Quote:

Originally Posted by event horizon (Post 1967093)
Yuck, the driver transistors to the output mosfets are also operating in class B by quite a margin..0.65V each way :eek: Not very nice at all, some kind of bias to get them conducting & speed things up might help :)

No bias at all ensures no cross-conduction. Note that these transistors are driven with a square wave, a logic signal, not with an audio signal, and that bipolar transistors tend to exhibit longer turn-off than turn-on delays. Note also that conventional bias schemes only work well at audio frequencies, not for the ~100ns current transients that these buffers have to deal with.


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