2 kwts discreet class d need help

Jimmy

Jimmy

New member
Hi Norazmi.I hope you want to modify your pcb design using totem and more than 1 pairs final fets.your thin pcb track may be effective to reduce noise.
 
Jimmy

Jimmy

New member
yeah,Rookiex.like that.but I need the pcb layout now.do you have the pcb design for such schem?
 
S

stewin

Member
hi rockie nice attempt .
1.the first thing please use nice class d fets like

irfb23n15,irf540z,irfb4227, please try to avoid irfp250
2.q23,q24,q25,q26 use bc327
3.d6 and d9 use batxxx schotky diode
4.remove 12vlts zener d19 all time i used it ,it failed.
5.increase the value of r12 resistor dead time to about 390ohms-420ohms
5.d20 you can use mur120
6.d17,d18 use 12vlts for the op amp

7 very important to note . instead of parallel many fets use hi power one like irfb4227 . a single pair can support 2ohms at +/-80vlts .remove the bd 139/140 totem drive direct from q24and q26
 
S

stewin

Member
Jimmy said:
glad to hear it.I'm waiting the next reviews.mine nearly finished.almost same scheme with yours.only no pre amp at the input section.I've tried Acca's design the gdt version with LM393.very simple but hifi sound.soft and clean mid treble.powerfull with tight bass.using 90vdc ct 5amp supply.gdt version for mosfet gate driver.very easy to built.now I want to try full discrette version.I've not tried IR version.because its easy damage if final fets shorted.the same thinking with you..hehe
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hi jimmy please post photos
 
Jimmy

Jimmy

New member
Top and bottom
 

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Jimmy

Jimmy

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I plan to try this pcb layout,I got it from unsound.com,but its no schem.some parts have not values.seem its a very simple D amp.
 

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Jimmy

Jimmy

New member
Hi Stewin.I'm very interesting to try this below schem.I got it from you.but I don't have the pcb layout,may be someone here have the pcb layout but with one layer.
 

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Jimmy

Jimmy

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D2k on testing with 90vdc supply.I've tried it with 150vdc ct 150vdc supply.worked good witnout problem and surely very powerfull sound.indoors testing
 

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Jimmy

Jimmy

New member
manojtm said:
Hi All

simple self osc. FULL BAND fsw=450KHz UCD no other complication, you can add protection later. change with high voltage MOSFET (500V) supply +140V & -140V you will get 2000W.
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Hi.Manojtm,do you have the pcb layout for this schem.I like to try it
 
Jimmy

Jimmy

New member
stewin said:
guys i have decided to go back to basics fully discreet. i liked this amp but the only set back was it never handled well high voltage the outputs were heating . but if i have to bridge at low voltage like +/-55vlts i prefer this amp to the others here are my layouts . i have ordered smd resistors but before they arrive here is what i am up to. i will post components and bom later. have fun
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Hi Stewin.please upload parts placement of the layout
Thanks.
 
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