IRS2092 How to drive more then one pair of output transistors? - Page 2 - diyAudio
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Old 20th April 2010, 10:33 AM   #11
Eva is offline Eva  Spain
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Use SMD (SOT-23) local buffer transistors (emitter followers) for each output MOSFET.

Although, this layout may work, parasitics make switching much slower resulting in much worse efficiency (and higher distortion) than in a proper SMD layout with 2+ layer PCB.

Parasitics will also limit the maximum rail voltage for safe operation.

3000W are possible with just four IRFB4227 when layout parasitics are low enough.
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Old 20th April 2010, 10:59 AM   #12
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Default Irs2092

hello here is the schematic
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Old 20th April 2010, 11:03 AM   #13
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Originally Posted by ionutzxpo View Post
hello here is the schematic
O great man, thank you so much.
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Old 20th April 2010, 12:46 PM   #14
luka is offline luka  Slovenia
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for diy I don't see how you would need more then 1 pair of fets for output, even with one it is ahrd enough
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Old 20th April 2010, 05:35 PM   #15
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even with one it is ahrd enough
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Old 20th April 2010, 08:25 PM   #16
luka is offline luka  Slovenia
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typo... hard
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Old 21st April 2010, 12:34 AM   #17
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hi eva
greetings can this circuit be constructed as it is with 3 output pairs
what output power would we get
thanking you
andrew lebon
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Old 21st April 2010, 10:12 AM   #18
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hi eva
greetings can this circuit be constructed as it is with 3 output pairs
what output power would we get
thanking you
andrew lebon
In my opinion it should work really good. I am not sure if UCP700 works on the same principle or it is full bridge but the only thing I am afraid it is the PCB design. But it is not that bad.
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Old 21st April 2010, 10:15 AM   #19
luka is offline luka  Slovenia
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from UcD is really good, but this on, well I hope it will work
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Old 21st April 2010, 01:03 PM   #20
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hi realforce
greetings how can we know if pcb is designed properly for
d class after all most important criteria is ground plane how does your
prototype sound
thanking you
andrew lebon
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