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Chip Amps Amplifiers based on integrated circuits

Improving a PAM8403 amp.
Improving a PAM8403 amp.
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Old 7th December 2018, 02:33 AM   #11
Redfoxuk is offline Redfoxuk
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Iv read the data sheet propperly now and viewd various sites/threads and board schematics to try find the best method to wire this.

I have added a 1000uf decoupling capacitor to the 5v input
Im already ready to add ferrite beads to the audio inputs if needed.

One schematic shows me that I need more components for my stereo jack.
Is this correct? Or is there a more elegant solution? Less parts would be useful as Im working in a very small space.
Click the image to open in full size.

I will post my schematic soon if anyone is happy to double check my work.
Also if there is any info on spacing and layout of the board people have that would be great. (Say if one part needs to be close to an output to reduce noise ect?)
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Old 7th December 2018, 02:38 AM   #12
nigelwright7557 is online now nigelwright7557  United Kingdom
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Reminds me of 1980 when my electronics class all built LM386 amplifiers as a task.
Pretty much everyone's oscillated and blew up !
The decoupling, layout and power supply all need to be just right.
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Old 7th December 2018, 02:53 AM   #13
Redfoxuk is offline Redfoxuk
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This is what im trying to find info about haha, I just keep getting data sheets. This is a accidental double post btw.. There is an identical post thats got more traction.
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Old 7th December 2018, 04:26 PM   #14
tomchr is offline tomchr  Canada
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Quote:
Originally Posted by Redfoxuk View Post
Also if there is any info on spacing and layout of the board people have that would be great. (Say if one part needs to be close to an output to reduce noise ect?)
Follow the recommendations in the data sheet. It's always a good idea to keep nodes with switching noise as short or small as possible.

Tom
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