Lm3886 with single ended supply

[simple simon]

The LM3886 data sheet has a figure showing a "Single Supply Application Circuit"

1) has anyone tried building this?

2) what does it sound like

3) are there inherent disadvantages in a single ended supply besides needing capacitors on the output to cope with the DC?

Thanks,

Simon.

[Captain archer]

Hello,

well i havn't build a LM3886 on a single supply before, but yes there are some disadvantages using a ouput cap.
one is that it introduces some distortion, especialy in the higher frequency's.
although this is very low but measureble.
another is that you must use a very large value (in the order of 10.000 uf) to get sufficient low end responce in a 4 Ohm load
A third disadvantage is that those capacitors are costly and they take up alot of space in the amp.
and from this extra money you can decide to use a dual power supply instead.
if you decide to use a single power supply be sure to use high quality caps (Nippon Chemicon or Panasonics) bypassed with some Wima 2.2uf or so, this enhances the sound.

for the rest the sound should be the same.

An advantage of using a single supply is that you have perfect DC protection allready build in.

succes in building your amp

Greets captain out.............................!!

[sivan_and]

Originally Posted by Captain archer

Hello,

well i havn't build a LM3886 on a single supply before, but yes there are some disadvantages using a ouput cap.
one is that it introduces some distortion, especialy in the higher frequency's.
although this is very low but measureble.
another is that you must use a very large value (in the order of 10.000 uf) to get sufficient low end responce in a 4 Ohm load
A third disadvantage is that those capacitors are costly and they take up alot of space in the amp.
and from this extra money you can decide to use a dual power supply instead.
if you decide to use a single power supply be sure to use high quality caps (Nippon Chemicon or Panasonics) bypassed with some Wima 2.2uf or so, this enhances the sound.

for the rest the sound should be the same.

An advantage of using a single supply is that you have perfect DC protection allready build in.
!

Try BTL in single supply mode...but u still need to create a virtual ground at the input side...advantages no capacitor at the output

[bobodioulasso]

One advantage of a single supply design is to bring a protection for the speaker in case
the amp fails and shows dc on its output. No relay needed.
I am not shure it sounds worse than symmetrical supply.

[sivan_and]

Originally Posted by bobodioulasso

one advantage of a single supply design is to bring a protection for the speaker in case
the amp fails and shows dc on its output. No relay needed.
I am not shure it sounds worse than symmetrical supply.

Yes...having a low drop p-type high current mosfet will switch & latch (in off stae) in case of short circuit in output semi's

[bobodioulasso]

Originally Posted by sivan_and

how ?

The output cap does no transmit DC.

[sivan_and]

Originally Posted by bobodioulasso

The output cap does no transmit DC.

oh..am thinking of BTL in single supply

[dmtparker]

Could you explain BTL single supply?

[zeonrider]

Why not?

Bridge adapter + 2 pcs. LM3886!

Regards

[dmtparker]

I'm confused. The attached file is just the single ended supply schematic for the LM3886 from the data sheet. What is BTL? (I don't even know what the initials mean.)
Perhaps post #9 was in response to a different question (not #8)?