tpa3116 audiobah pbtl help?

[bunkhokum]

Hi y´all.
Did anybody actually use the audiobah green card tpa3116 in pbtl mode bridging the solderpads? Pictures or detailed explanation? Only thing I find is picture that comes from the seller without explanation AND a waver (i.e. do this at your own risque) I guess one could also just run the one channel, however, since it´s called parallell bridged mode...what would happend if one just split i.e. fed the monosignal from say left to both the channels and then tied both outputs to one speaker post. And the of course the same from right on the other card. What would the caveats be? It´s parallell, right? So...?
Thankful for input.

 

[OpterN]

..what would happend if one just split i.e. fed the monosignal from say left to both the channels and then tied both outputs to one speaker post. And the of course the same from right on the other card. What would the caveats be? It´s parallell, right? So...?
Thankful for input.

I think it would not work and might break the amp/speaker. Looking audiobah and hiamplifier boards one can see five soldering spots on the back side of the board. If I understand correctly all five should be shorted to turn the board to PBTL mode. I don't have either of the boards, but I'm planning to turn Sure board to work on PBTL mode.

What I'm curious about is how shorting those spots will change the circuitry. At TI EVM board only Left channel negative and positive inputs are shorted to ground and speaker out are tied together after chokes. But in TPA3116 datasheet schematic output channels are shorted before chokes and only two choke are used. How will this difference affect the output filter performance? Another question is why previously mentioned boards have five spots to short and not four? Is there something, that I'm not seeing?

Attached is the EVM circuit schematic. I don't remember where I got it.


PS. Link for EVM datasheet: http://www.ti.com/lit/ug/slou336b/slou336b.pdf

 

[irribeo]

Just short at least first 3 on ac1308 ampboard, you can forget 2 near output, hiamp doesn't have those, but you can only use 2 screws from outputs then.