Infineon MA12070 Class D

[zek]

...the version with box costs 16 euros more!

Not for me ...

 

[mamocel]

Lucky..! The prices displayed for France are higher...
But sorry, but you indicated the price for the board alone...
Click on the other one and tell me the difference!

 

[mamocel]

In fact, your screenshot is a welcome offer...
You don't seem to have an Ali account...😉

 

[xrk971]

In the USA, option with chassis is $43.67 USD with free shipping.

 

[mamocel]

In the USA, option with chassis is $43.67 USD with free shipping.

This seems normal to me, automatically in France we are taxed at 20%...😕
I ordered on Ebay for 28Euros, free shipping, board only.

 

[mamocel]

Tested quite a few MA12070 boards and the winner is double Chip €30 board fed by
SMSL DL200 differential signal to indicated removed caps
. Skipping active stage is best. Output stage on DL200 has no coupling cap either.

No risk of DC current without decoupling capacitor?
If I don't add anything, do you have any recommendations?
Everything except ceramics!

 

[Solve]

No risk of DC current without decoupling capacitor?
If I don't add anything, do you have any recommendations?
Everything except ceramics!

Wima MKP 4,7 uF.

 

[Solve]

I would use an hot glue gun and glue them on the yellow RCA inputs and wire to the chip inputs.

 

[mamocel]

Or mini pcb....I think these Wima MKP must be imposing...?🐘
And you need 4 per board!

 

[mamocel]

https://www.manomano.fr/p/condensat...as-225-mm-l-x-l-x-h-265-x-105-x-19-mm-8450610

MKS better than MKP ?

 

[maggusxy]

Hi @ all,

I just want to make you aware of, that I have published my project of my 4CH DSP/Bluetooth Amplifier with MA12070 on GitHub.
I have not touched this since a while (over 3 yrs or so) and haven't checked it if it still compiles etc.. But maybe it's interesting for the one or the other.
https://github.com/YetAnotherElectronicsChannel/ESP32_4CH_DSP_BT_AMPLIFIER

 

[Porsuk26]

How to adjust the volume on Qcc3031 with the Qact_base.win.7.2.8 program? Do we have experienced members? thanks

 

[skyra]

Maybe a bit offset question: Can anyone tell me how to disassemble the topping PA3S ? So far I removed the back plate, the board slides out about 2 inches, then??? On the front side I do not see any way to remove the panel..... To get the PCB out the connector from the front plate to the PCB must be disconnected, but how? Any help would greatly appreciated.

 

[mamocel]

Did you remove the volume knob...And unscrew the nut on the potentiometer shaft?

 

[torgeirs]

https://www.ebay.de/itm/18609635083...8f9GdQZTAi&var=&widget_ver=artemis&media=COPY

I tried to measure a board like that with an pc oscilloscop this week. Smoke😢
Grounded both input and output to same ground was the mistake i suspect?
But since you like it. Maybe I will order another one and measure with floating output.

 

[mamocel]

Grounded both input and output to same ground was the mistake i suspect?

Yes...this is not forgiving.
I received 3 of these cards, they have now covered the chip with a blue heatsink... Well glued!

 

[mamocel]

 

[ValoWaking]

Tried to parallel the other caps but things are tight indeed. Initially I shorted an input but it is OK now and it sounds quite good. The goo is polyurethane but in the color red.

Hi, what film caps you use to shunt 2.2uF MLCC?

 

[Radian]

Jean Pauls Account has been disabled.

 

[Radian]

View attachment 1290654

Any News?