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Old 1st November 2009, 02:39 AM   #1
JIMMEE is offline JIMMEE  Thailand
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Default 6000W By IRS2092

Who try to do?

http://www.upload.in.th/index.php/fi...rs2092-6kw.pdf
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Old 1st November 2009, 03:07 PM   #2
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Here is a JPG picture of the circuit since the PDF is too big to attach.
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File Type: jpg IRS2092_6KW.JPG (107.1 KB, 11385 views)
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Old 1st November 2009, 05:32 PM   #3
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Max +/- V rail supply?
+/-200v Rail => 6000w ?
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Old 1st November 2009, 07:15 PM   #4
Pafi is offline Pafi  Hungary
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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).
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Old 1st November 2009, 07:25 PM   #5
jleaman is offline jleaman  Belgium
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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
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Old 1st November 2009, 08:14 PM   #6
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Quote:
Originally Posted by Pafi View Post
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).
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Old 1st November 2009, 08:28 PM   #7
mag is offline mag  Switzerland
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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
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Old 1st November 2009, 08:52 PM   #8
Eva is offline Eva  Spain
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Quote:
Originally Posted by mag View Post
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.
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Old 1st November 2009, 08:57 PM   #9
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Quote:
Originally Posted by mag View Post
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 Not very nice at all, some kind of bias to get them conducting & speed things up might help
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Old 1st November 2009, 09:18 PM   #10
Eva is offline Eva  Spain
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Quote:
Originally Posted by event horizon View Post
Yuck, the driver transistors to the output mosfets are also operating in class B by quite a margin..0.65V each way 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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