If rightside is bass amp that seems master on that 2.1 board, for synch they filter befor pcbtrace to slave then, so looks like they maybe got confused by datasheet gainsetting chapter??? I did switch these resistors soldering my first 3116 ampboard too but maybe that is reason I seem to see mixed master/slave gainsetting on your pic that might not be real LOL
I don't believe using coupled output inductors is possible with the TPA.
(edit, oh wait, that's a PBTL amp...)
Let me ponder that some more.
(edit, oh wait, that's a PBTL amp...)
Let me ponder that some more.
Thanks Mike. I was afraid of that. I need a bigger case then but that should not be a problem. Back to the drawing board 🙂
very neat
but (pardon the ignorance) what does it do.
It is very clean.
It is a TPA3116, you said,
but (pardon the ignorance) what does it do.
It is very clean.
Nice design! How is there no soldering? I see several thru hole components and
I assume you are using oven re-flow which is what you mean by no (manual) soldering? Why are there 4 electrolytic caps on the front end?
I modded two YJ blue black board as a pbtl. Removed left caps and tied solder pads to ground. Replaced power caps with 220uf silmics.. Input caps are 1.5uf ESA. Both pcb has snubber mod.
When I power up the boards, there was a distorted sound. Disconnected immediately. I power up boards with 19v 6.3A laptop brick.
Before modding both boards was working properly. I checked my work step by step.. Couldn't find anything. Any idea?
When I power up the boards, there was a distorted sound. Disconnected immediately. I power up boards with 19v 6.3A laptop brick.
Before modding both boards was working properly. I checked my work step by step.. Couldn't find anything. Any idea?
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
negative input needs same capacitor as positive input, chip needs capacitor befor gnd/chassis(preamp/source), if there had been a capacitor bottomside I would expect your wire to be mounted topside pcb, not on chip side but after capacitor.
Irribeo, I followed this guide;
Mod a TPA3116 amp for Mono Mode - Simple Media Networks, Inc
But removed negative caps and shorted pins...
Mod a TPA3116 amp for Mono Mode - Simple Media Networks, Inc
But removed negative caps and shorted pins...
In link negative cap is connected to source/preamp gnd, you can try that to see if it is noisier or quieter, but you need the capacitor.
Now soldering))) Manual.
4 electrolytic caps for DC decoupling input.
Sorry, my english is bad((
Attachments
Irribeo, I corrected my mistake. Soldered identical caps to positive and negative inputs. Same behaviour.. Only distortion at zero volume. Is it possible to be no cap at the negative side damaged IC?
Please measure the voltage at the In+-R/L pins, they should be around 1.5Vdc and all the same. (Behind the caps)