Audio Amp Recommendations

[jefflongo]

Hey, I'm currently learning to design custom PCBs. I'm going to integrate an audio amp into my current project and I am trying to decide from the plethora of options online. Anybody have any recommendations? I'm not implementing a headphone jack and haven't decided on speakers; I am just looking for one that will give me good audio quality, is relatively simple, has a mute function, and being able to use a slider for volume would be a plus, though I'm sure I could implement a conversion from analog to digital volume control.

 

[MasterNate]

I am also designing a custom pcb for my portable. I am using @JacksonS amp that he designed. Here is a link to the github page.

https://github.com/JSnowden33/LM49270-PIC

 

[jefflongo]

I am also designing a custom pcb for my portable. I am using @JacksonS amp that he designed. Here is a link to the github page.

https://github.com/JSnowden33/LM49270-PIC

Hmm cool concept, but might be a little overkill for what I need.

 

[DeoNaught]

Anything wrong with using a PAM8803? I mean it fits all your needs, and very easy to intergrate

 

[jefflongo]

Anything wrong with using a PAM8803? I mean it fits all your needs, and very easy to intergrate

I'm open to using it (aside the fact that it has digital volume adjustment), I'm just wondering if there's anything else recommended.

 

[JacksonS]

I think the LM49270 is a good choice even without the headphones. It requires very few external components except for the microcontroller. My code has slider functionality too.

 

[jefflongo]

I think the LM49270 is a good choice even without the headphones. It requires very few external components except for the microcontroller. My code has slider functionality too.

I'll look into it. Thanks! What speakers do you use with it?

 

[JacksonS]

What speakers do you use with it?

700mW rectangular speakers like these work best for me.

 

[jefflongo]

Hmm.. I still think that amp might still be a bit overkill for my needs. I've been looking at some different PAM variations, and these three seem to have analog volume control and a mute function.

https://www.diodes.com/assets/Datasheets/PAM8603M.pdf
https://www.diodes.com/assets/Datasheets/PAM8001.pdf
https://www.diodes.com/assets/Datasheets/PAM8008.pdf

Though I'm not sure what the differences are aside from the 8001 being 2W/ch as opposed to 3W/ch. Do these look good/simple to use? Has anyone used any of these before? Where is the sweetspot of power/channel? How should the power rating for your speaker match up with the power output per channel?

EDIT: I think I'm going to go with the PAM8603M unless there are any reasons I shouldn't

 

[splain]

Sorry to be a newb, but can't you just add a pot to the input line, and have analog volume control for any amp? How do these PAM chips handle it differently having it "integrated?"

 

[jefflongo]

Sorry to be a newb, but can't you just add a pot to the input line, and have analog volume control for any amp? How do these PAM chips handle it differently having it "integrated?"

You would need a pot for each input line

 

[splain]

Ok. Or a stereo pot if someone still wanted to use a PAM8803 with analog controls

 

[Portable noob]

pam8403? they're perfect and also use a pot to adjust the volume: https://www.ebay.com.au/itm/1-10-x-...a98ac231d:m:my0HGuyG_Ig2-MIAW34tszg:rk:4:pf:0
Something like this would work a treat for only speakers. although i dislike the fact that it requires a pot to change the volume which is why I'd go with the pam8803 ic instead
Although i believe the pam 8403 is missing the mute function you're looking for.

 

[Stitches]

pam8403? they're perfect and also use a pot to adjust the volume: https://www.ebay.com.au/itm/1-10-x-...a98ac231d:m:my0HGuyG_Ig2-MIAW34tszg:rk:4:pf:0
Something like this would work a treat for only speakers. although i dislike the fact that it requires a pot to change the volume which is why I'd go with the pam8803 ic instead
Although i believe the pam 8403 is missing the mute function you're looking for.

Holy necrobumps Batman!

 

[cheese]

Locking this thread, let me know if you want it unlocked @jefflongo