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Old 7th January 2008, 03:31 PM   #1
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Default looking for pmh3000 behringer power mixer schematics

Hi everyone,

I'd like to find pmh3000 behringer power mixer schematics, in fact just power amp section.

I'm just curious about the way they implement class d topology in their power mixer.

I've just downloaded pmh1000 Schematics (N and P mosfet halfbridge for 200W/4 ohms)

can someone help me finding this schematics ?

thanks !
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Old 8th January 2008, 05:34 AM   #2
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I have't once this unit for repair, not sch, but i remember it uses 2*IRFP640N with 4 diodes (paralel-series), drived by some integrated ic (like tc429, smd), optocoupled with some BP ic, feedback after the filter (20uh+1.5uf), many smd caps for decoupling vcc.
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Old 8th January 2008, 06:54 AM   #3
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self-osc (aprox 500khz at iddle), half bridge..., +/-70v, photos soon....
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Old 8th January 2008, 07:25 AM   #4
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thanks ionutgaga !
waiting for your photos...
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Old 8th January 2008, 12:29 PM   #5
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Is it using different output stage than PMH1000?
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Old 8th January 2008, 01:12 PM   #6
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Yes, indeed; is totaly different...
Tommorow i will make some photos of this unit and i will atach to this forum. Just for curiosity... pcb is multilayer (maybe 4, but i'm not sure)
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Old 7th February 2008, 08:30 AM   #7
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PMH5000 class D:
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Old 7th February 2008, 08:31 AM   #8
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HCA8001AIB, HCPL0611, ICL7667, T130 gray core, IRF640N with series scottky and fast paralel diodes, bootstrap 12v floating source...
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Old 4th March 2008, 09:20 PM   #9
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Thank u a lot ionutz .. u saved me a lot of time with th ename of the driver components for the power mos fets ..

best regards .. savu
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Old 4th March 2008, 09:39 PM   #10
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Savu,


I have a DPA300 power amplifier schematic that I can send to you but it is to large to post. If you can send me your email I will send you the PDF.

Sparky87
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