2 kwts discreet class d need help

Jimmy

New member
Hi Manojtm.Thanks a lot for this schem.would you share the pcb layout.
 

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2hartanto

New member
Hi, i'm interested with this topic..but why i can't open pdf schematic in this thread ? Do i have to post something first??
 

Jimmy

New member
Hi Stewin.how about your full discrette D amp?has it working good now? please review it here.
 

bimbla

New member
Hello Stewin,

I read in the thread that you are facing some noise issues.
Kindly help me understand it correctly: One channel works perfectly at all volume and all voltages. But when you connect second channel, there is slight noise. Correct?

This could be an issue of ground loop. The simple solution that I can suggest is have a separate P/S for each channel. i.e. let the two channels float w.r.t each other. In other words, try a dual mono.

bimbla.
 

stewin

Member
hi all busy perfecting smps and ucd semi discreet .that is lm 311 and ir2110 all is well but ocp protections are the ones holding me back .i have made lorylaci ucd version with protection ,it works well but trips very soon / early i think when the amp is 60% loud . i wanted it to reach about 92% at 2ohm per channel because i wanted to use full bridge +/-70vlts fets used are a pair of irfb4227 per channel ;ww::(;ww: .



600W Class D amplifier ucd_ir_hid_jav.jpggtG ucd 1100 rev 1.0 with protect semi smd.jpggtG ucd 1100 rev 1.0 with protect semi smd bottom.jpgView attachment gtG ucd 1100 rev 1.0 with protect semi smd components.pdfView attachment gtG ucd 1100 rev 1.0 with protect semi smd pcb artwork.pdf
 
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ravs

Member
hi norazmi

your pcb doesent match schematic you have posted.i have made the amp with irf540n its working fine they are heating a lot
setting the preset only the negative side fet heats a lot.should i change gate resisrer 22 to 47 ohm.
 

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stewin

Member
sorry i was away busy with errands but now i can spare sometime. by the way which topic did you raise the question sir?
 
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stewin

Member
the lm311 post and pre feedback project is coming up...... :cool:

it uses both post and pre feedback ..

any opinions and comments are appreciated.;)

i have uploaded the schematic but it is not showing
 
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