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-   -   looking for pmh3000 behringer power mixer schematics (http://www.diyaudio.com/forums/class-d/114984-looking-pmh3000-behringer-power-mixer-schematics.html)

alexclaire 7th January 2008 02:31 PM

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 !

ionutgaga 8th January 2008 04:34 AM

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.

ionutgaga 8th January 2008 05:54 AM

self-osc (aprox 500khz at iddle), half bridge..., +/-70v, photos soon....

alexclaire 8th January 2008 06:25 AM

thanks ionutgaga !
waiting for your photos...

lumanauw 8th January 2008 11:29 AM

Is it using different output stage than PMH1000?

ionutgaga 8th January 2008 12:12 PM

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)

ionutgaga 7th February 2008 07:30 AM

2 Attachment(s)
PMH5000 class D:

ionutgaga 7th February 2008 07:31 AM

2 Attachment(s)
HCA8001AIB, HCPL0611, ICL7667, T130 gray core, IRF640N with series scottky and fast paralel diodes, bootstrap 12v floating source...

savu 4th March 2008 08:20 PM

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

sparky87 4th March 2008 08:39 PM

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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