Class D Amp Photo Gallery

[Baldin]

Looks like IR20957 and postfilter FB. Is it Post filter only?
I'm working on a design with IR2092 with a combination of post and pre-filter FB, where the OTA amp in the input is used as comparator, so compared to IR20957, omitting one component.
Seems you are using a buck converter for the gate drive supply. Which one? Haven't been monitoring the development in this area, but maybe I should, the problem has been that the input voltage has been limited to around 60V, where 100V would be ideal for the IR gate ICs to batch their max supply voltage.
What is MDR input for?
Nice PCB ... 5 x 10 cm? .... this is what I'm trying to limit myself to

 

[kartino]

My UcD Fulbridge for PA
Supply +/- 90Vdc. Tested live to drive 2x18" vc 5" and the speakers are on peak already

 

[stewin]

My UcD Fulbridge for PA
Supply +/- 90Vdc. Tested live to drive 2x18" vc 5" and the speakers are on peak already

hi katrino very impressive , nice work ,.

how do you deal with the noise?? have you ever tried to bridge the amp , was it stable??

please post schematics and the forum of your build.

 

[stewin]

also what output fets do you use at +/-90vdc?
and the minimal inductance you have used successfully is what load??
schematic please??

 

[kartino]

It is very stable, more than 100 hours for many events.
Load 4 ohm (2x18") per channel. No Noise, very quiet. It is fullbride, not BTL.
Schematic has been posted in my thread

 

[kartino]

On test video is here:

YouTube

 

[doctormord]

Small TPA3128 (TPA3116/3118 successor) stereo setup in 2x6liters bass-reflex with touch, podcast, Airplay, DLNA.

Amp:
TPA3128D2 – 2 x 30/50W Stereo 60/100W Mono Class-D Verstarker – #360customs

 

[irs20957]

doctormord Nice! )))

 

[Baldin]

Small Class-D Plateamp

Finished my small plate amp for my mini sub
( Reckhorn Mini-Sub )

Amp based on IRS2092 but with a mix of post and pre-filter feedback.
Running 200 W i 4 ohm, using a Connec Electronic 240R SMPS with +-40Vdc.

 

[dudaindc]

Nice one, Baldin!

 

[Victorinox]

Small TPA3128 (TPA3116/3118 successor) stereo setup in 2x6liters bass-reflex with touch, podcast, Airplay, DLNA.

Amp:
TPA3128D2 – 2 x 30/50W Stereo 60/100W Mono Class-D Verstarker – #360customs

Love it! is that finished product or you gonna paint it?

 

[Pygmy]

Work in progress pic:

Amp consisting of modded tube buffer and heavily modded TPA3116D2 board, using R-Core transformer and Meanwell SMPS.

It hasn't killed me yet so I think it's going great.

 

[surfatwork]

Dinky little amp. No mods, except to reduce gain to 20. Powered by external laptop supply.
@den_hr: thanks for inspiration on the case, though my efforts are certainly not as good as yours.

 

[den_hr]

Dinky little amp. No mods, except to reduce gain to 20. Powered by external laptop supply.
@den_hr: thanks for inspiration on the case, though my efforts are certainly not as good as yours.

I quite like it! Very nice and definitely has enough ventilaton

 

[Wheellessautomotive]

Going to need a new set of tires for the bandsaw😆

 

[irs20957]

I make an amplifier 2.1. Case 1U
2xTPA3251, MW LRS-350-48, adjusting 38V, microDSP ADAU1701

 

[matt_garman]

2xTPA3251

Is that your own tpa3251 board? I'd like to see and read more about that if so!

 

[irs20957]

I did not spread the information about this))) Used in development "TPA324x and TPA325x Post-Filter Feedback" and "TPA3251D2EVM"

 

[IVX]

irs20957, I think you need a lot more alcaps on the rail, due to you SMPS is just 7.3A rated In case of 2 channels load on sine wave 20Hz at 4Ohm resistors(hence 2Ohm), your SMPS will be able to handle only 2Ohm*7.3A = 14.6VDC i.e 2x25W.
PS: Ohh, it's 4ch amp yet?

 

[irs20957]

In the case there is enough space 3300ufx18
3 channels amp, 2.1, Satellite 8 ohm, Sub 4 ohm.