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Class D Switching Power Amplifiers and Power D/A conversion

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Infineon MA12070 Class D
Infineon MA12070 Class D
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Old 14th October 2021, 01:43 AM   #511
Michael Xiao is offline Michael Xiao
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Join Date: Oct 2021
Quote:
Originally Posted by Yatsushiro View Post
Does this work?
The burned IC is CH224K and I had explained the reason why it will be burned in the last reply. For this board, First you can remove the burned IC and check the 5V power supply, then check the MA12070Pís IO haven't breakdown by Rpi.At last please confirm the max voltage is 20V, if you remove the CH224K firstly, you can put 24V.
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Old 18th October 2021, 11:52 AM   #512
maciekw is offline maciekw  Poland
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Location: Warsaw
Default long cable

Hi Michael:
I have a question for you: with long speaker cables (5-6 meters) should I use additional output EMC filters for your amplifiers?
I want to use your amplifier modules to power my surround speakers for my home cinema.
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Old 18th October 2021, 03:47 PM   #513
ernperkins is offline ernperkins  United States
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In case you haven't seen it, here's the Infineon app note on using filters. It should answer your questions.

Last edited by ernperkins; 18th October 2021 at 03:48 PM. Reason: typo
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Old 19th October 2021, 07:07 PM   #514
maciekw is offline maciekw  Poland
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@Ernperkins:
Thank you for the linked document. However, while looking at the module board, I noticed that there is already a simple EMC filter on it under the heatsink. And when asking the question, I meant is it sufficient according to the board designer to remove the interference emitted by the longer cables?
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Old 22nd October 2021, 11:22 PM   #515
grahamgraham is offline grahamgraham  United Kingdom
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Quote:
Originally Posted by Michael Xiao View Post
Hi,
I'm the designer with PL-AD-150 from Shenzhen PILLOR, any problem or suggestion let me know, and I will answer it try my best, thanks!
Hi Michael,

Thanks for posting here.

Maybe others like me don't know how these boards come to life, would you be able to explain the journey, please? I searched for Shenzhen PILLOR when I first got my boards but found nothing.

Is it a design made just for the DIY market or did it have an intended market purpose? Knowing the back story, research and development would be fascinating.

Cheers!

G.
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Old 23rd October 2021, 08:17 AM   #516
abraxalito is online now abraxalito  United Kingdom
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Location: Hangzhou - Marco Polo's 'most beautiful city'. 700yrs is a long time though...
Quote:
Originally Posted by Michael Xiao View Post
The burned IC is CH224K and I had explained the reason why it will be burned in the last reply.
The picture shows damage to an 8pin SOIC IC which the markings look to say 'MP1593DN' - this checks out as a 3A buck regulator. The CH224K is a 10 pin package nearer to the USB input. The MP1593 has a max input voltage of 28V.
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Old 27th October 2021, 07:36 PM   #517
horika is offline horika  Hungary
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Hello Guys. I got my module with MA27070P chip. can I put an i2s signal directly on its input? I use amanero.
amanero Outputs: data, bclk,lrck,mlck, grn
ma127070 inputs: sck,ws,grn.sd0,sd1
which one where?
mute pin? eneble pint?
i didn't get any documentation for it.
can somebody help me?
thx.
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Old 27th October 2021, 09:04 PM   #518
horika is offline horika  Hungary
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this is not the rpi version. it does not have a 40pin connector
Buy Products Online from China Wholesalers at Aliexpress.com
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Old 27th October 2021, 09:41 PM   #519
mboxler is offline mboxler  United States
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That link just gets me to a login page.
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Old 28th October 2021, 07:33 AM   #520
horika is offline horika  Hungary
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sorry.
High Quality HIFI Digital CLASSD Power Amplifier Module MERUS MA12070 2X80W 1.4 Version|Instrument Parts & Accessories| - AliExpress
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