LM3886 Parallel Use
 

Does anyone know how to parallel the LM3886 together to increase max. output current and improve damping factor.

I do know that Jeff Rowland DG is using this approach in their amplifiers.

Many Thx.

Rachel

yep you do this ............

the 3875 shown is a scaled down version of the 3886 and the 3886 can be placed in this circuit without any problems.

Many thx. AudioFreak. Are you using DC servo for the feedback loop for each Power OpAmp module? Fantisic....

Anyway, many thx.

The servos are so that you dont get a different DC offset @ each of the outputs ... you'll also probably want to add a circuit that protects the speaker from DC which is not catered for in the schematic above.

National had a conceptual schematic as well, I have the PDF but can't seem to find it on their site anymore. Email me if you'd like me to send it to you. The title is:
Bridge/parallel amplifier (BPA-200) documentation, Sept. 19, 1997.

Paul that's exactly where the schematic above came from.

Apexjr has sold parapix amps which contains two lm 3886 ic's. On his site their is lot of information available regarding lm3886. I have also used the amp. Hope this helps.
Mahendra Palesha

I am also interested on parallel-bridging LM3886. Has anyone tried to do that? And what if you don't use servo circuits?
Please post any schematics you have.
Thanks!