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Class D Switching Power Amplifiers and Power D/A conversion

Need help with schematics and amp IC choice.
Need help with schematics and amp IC choice.
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Old 9th December 2019, 05:40 AM   #1
NoiseBoi is offline NoiseBoi
diyAudio Member
Join Date: Dec 2019
Default Need help with schematics and amp IC choice.

I have been working on a project for a long time to add a headphone + 1" speaker amp to a handheld system.

So far I have tried both LM4808 and LM4880.
Started using the typical schematic, then various other ones found online.
In all cases these just remain very very quiet although they are sucessfully used in many products without the issue.

I also tried one of them premade TDA1308 boards and it was TOO loud lol, plus sounded terrible with the 1" speaker.

Could anyone guide me on how to work the LM amps gain? or even quickly adjust the typical schematic to give the needed gain?

Iv done everything I can think of but I must be missing something.(and misunderstanding the datasheet)

Note: the speaker will be something like thisClick the image to open in full size. (Already have the ability to send mono down one channel before the amp, stereo is required)

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Old 11th December 2019, 10:04 PM   #2
grandwazoo is offline grandwazoo
diyAudio Member
Join Date: Sep 2018
1) I think you need to tell us what your 'typical schematic' is, and
2) to be honest, I can't imagine a 1" speaker NOT sounding terrible.

What exactly do you mean by a 'handheld system'? A phone? An mp3 player? Which one?
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