UCD 25 watts to 1200 watts using 2 mosfets

[manojtm]

Hi stewin,
My old design, i was tested with common PCB and sound not good more noise so i discarded my design change to carrier based one. i use some part for my new class d.now i saw this thread it is great.so anyone can change this and design a good PCB don't ask me why i change L1 value(changing uH sound is good)some mistake is in my schematic i know that.Good luck

Regards
MANOJ

 

[chago25]

what voltage did you use and was the outputs heating ?

i use only 60 0 60vdc at 8 ohms. the mosfet still cold without heatsink only inductor coil has slight heat

 

[stewin]

i use only 60 0 60vdc at 8 ohms. the mosfet still cold without heatsink only inductor coil has slight heat

has anyone tried +/-90vlts dc

 

[luka]

has anyone tried +/-90vlts dc

I used +/-75v and 4r with irfp4227 and zetex buffers between fets and IRS

 

[apexaudio]

JBL use LM311 and NE555 for protect, amp use TL081 on input and inverters...

 

[thienchay]

My New PCB , IRS-2000D , will be IRS-3000D if used +/-130V .

 

[paskal9]

My New PCB , IRS-2000D , will be IRS-3000D if used +/-130V .

willing to share the schematics and pcb? looks like 2 pairs of mosfet with totem pole.

wicked amp for low impedance load

 

[thienchay]

willing to share the schematics and pcb? looks like 2 pairs of mosfet with totem pole.

wicked amp for low impedance load

Yeah , 2 pair mosfet for 1 channel , will load 2 Ohm at +/- 130V max , 3000W .
I'm not yes draw the sch , i can share my PCB , i'm remake of Detex IRS-3000D .
This is Layout

 

[thienchay]

And PDF file ....
regards

 

[stewin]

My New PCB , IRS-2000D , will be IRS-3000D if used +/-130V .

are you sure it will work with that voltage?? what fets are you planning to use??

 

[sweetperfume]

does that design works with cd4049 perfectly with given rate of output

 

[manojtm]

Hi thienchay,

you are not connected a diode from junction to -VE rail it is must for class d amp

Your PCB is look good

Regards
MANOJ

 

[thienchay]

are you sure it will work with that voltage?? what fets are you planning to use??

That information from Detex .
I 'll used IRFP460 .
regards

 

[red_zone003]

At what rail voltage will give 1000w into 8ohm's ?

 

[thienchay]

Hi thienchay,

you are not connected a diode from junction to -VE rail it is must for class d amp

Your PCB is look good

Regards
MANOJ

Thanks , you can show me that . Maybe i have some mistake
Regards

 

[paskal9]

At what rail voltage will give 1000w into 8ohm's ?

at 130v if you could swing it rail to rail and without any lack of current will give you 1056w into 8 ohm.

i do think it's better to bridge the 8 ohm if you're looking for that much power. 63v rail into 8 ohm bridged will yield 992w.

 

[stewin]

at 130v if you could swing it rail to rail and without any lack of current will give you 1056w into 8 ohm.

i do think it's better to bridge the 8 ohm if you're looking for that much power. 63v rail into 8 ohm bridged will yield 992w.

by the way thienchay will you bridge the amp at that high voltage +/-130vlts.

 

[stewin]

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

 

[CPX]

Heating is due to deadtime form and effective delay,i do not think the amplifier in itself has a problem.

 

[sweetperfume]

has anyone built this amp with success