D REX1200 schematics

[alexclaire]

Hi everyone,

I got D REX1200 class d amplifier schematics (subwoofer car amplifier):
SMPS 12V---60V 1.2kW
class d amplifier : 600WRMS/4 ohms
1200WRMS/2ohms

Iy you're interested let me know !

 

[Eva]

I'm interested. I've had to repair a couple of these amplifiers and I remember some black big potted box whose contents I want to know 😀 (if I'm not mistaking models).

 

[edl]

Hi,

You wrote that the PSU rails are 60V.
600W on 4ohm or 1200W on 2ohm requires 140Vpp, so the rails need to be about 2×80V.
Anyway I am so interested, shall you upload the documentation?

Thanks, regards,

 

[Eva]

In the first batches of these amplifiers, the internal supply voltage was around 75V while PSU capacitors were just 63V units. That caused some capacitor failures from time to time (I replaced them with 80V types). Also, if I remember properly, the output stage is a full bridge with 2 n-channel and 3 p-channel TO-220 devices paralleled on each leg, and output current is sensed through small and thick shunts, so rail efficiency should be very high. An HIP4080 was used as a driver if my memory doesn't fail.

 

[titanchen68]

Yes , i get intresting .
I try to make a Class-d amp for car using.
But I still get some question in desinging.
So , could you send me the circuit to me ??

 

[mgm2000ro]

Hi alexclaire !!
Please could you send me diagram schematic.

 

[alexclaire]

DREX 1200

here are the files...

 

[alexclaire]

DREX1200

and...

 

[mgm2000ro]

Do you post here ,or send me a schematic of this amplifier not smps.
Thx.

 

[kartino]

I think he post only half pages, the first is the Amp, the second is the smps.

Is he realize that?

 

[alexclaire]

D REX 1200 schematics

Hi ,
yes i realize i've posted only half of the schematics !
I'm able to recognize smps and class d amp
But the others pages have a big resolution that is problem to be posted...
I'm going to find a way to send them to you...

 

[mgm2000ro]

UPLOAD AT http://www.imageshack.us/ and post link.
If you have any power schematic of class D send me in mail pls ( mgm2000ro@yahoo.com) .
Best regard !

 

[Eva]

alexclaire:

You can always use some image editing software to split the pictures.

 

[Eva]

Hi Alexclaire

I'm currently troubleshooting one of these amplifiers but I don't have plenty of time to fix it. Could you post or send me the remaining half of the schematics? You would save me from a lot of reverse engineering work.

 

[Eva]

Nah, problem solved... (two hours later)