LM 3886 Amplifier design

[senz_90]

hello everyone. is there anyone in this forum ever build a gainclone based on LM 3886 Ic Natinal Semiconductor?

i have a plan to build it after have a time and before that i wanna hear something useful advice to build it with high performance..i don' t wanna makes a mistakes with that ic. because that ic has high price i think on my town. it's gonna bad if i constructs it without knowing what the best schematic that give a good result. i have googling enough i think but that's many schematic around google. with an inductor no transistor, or no an inductor no transistor even a potentiometer. have an inductor without transistor..

so any advice and schematic really appreciated to build the best one where this is the first time i try building so i don't want to mess up with no experience..

[budm]

Re: LM 3886 Amplifier design

https://cdn.badcaps-static.com/pdfs/...d0fd7f1e56.pdf
Read page 17 and up, you can have good components and circuits, but bad board layout can ruin any design.

[ben7]

Re: LM 3886 Amplifier design

https://cdn.badcaps-static.com/pdfs/...d0fd7f1e56.pdf
Read page 17 and up, you can have good components and circuits, but bad board layout can ruin any design.

Agreed!

One important thing is thick ground traces. Don't want any ground loops, however a way to combat that is to have a 'ground star' design.

[lti]

Re: LM 3886 Amplifier design

That's the first TI datasheet I've seen that actually had some useful information in it.

[budm]

Re: LM 3886 Amplifier design

I really learn a lot from reading the spec sheet/Data sheet and app notes of the devices.

[senz_90]

Re: LM 3886 Amplifier design

https://cdn.badcaps-static.com/pdfs/...d0fd7f1e56.pdf
Read page 17 and up, you can have good components and circuits, but bad board layout can ruin any design.

yeah. i have downloaded it. i really like build the schema within transistor. but i couldn't find any layout for pcb. the layout on googling didn't use transistor likes on datasheet. of course i don't want ruin my design with bad board layout just googling. maybe i have to design it with express pcb i have.

[senz_90]

Re: LM 3886 Amplifier design

Agreed!

One important thing is thick ground traces. Don't want any ground loops, however a way to combat that is to have a 'ground star' design.

so the ground must thick enough on pcb design?
any site have a schematic within transistor like in datasheet?

[budm]

Re: LM 3886 Amplifier design

Are you referring to the transistor for the single power supply? Are you going to use single or dual power supply setup? You do need to have the network on the output of the amplifier, see page 22.
Here is some readings:
http://mark.rehorst.com/LM3886_amp/index.html

[senz_90]

Re: LM 3886 Amplifier design

Are you referring to the transistor for the single power supply? Are you going to use single or dual power supply setup? You do need to have the network on the output of the amplifier, see page 22.
Here is some readings:
http://mark.rehorst.com/LM3886_amp/index.html

yeah exactly what i means, like this schematic. but the site u give me didn't showed that schematic. it has broken link maybe..