LM4780 pcb layout and others

[BrianGT]

National now has the pcb layouts for their LM4870 evaluation board and other evaluation boards on their website here:
http://www.national.com/appinfo/audi...19,968,00.html
There are pictures, gerber files, and pdf information about the boards. This might be a very easy way to do a LM4870 project, with the recommended pcb considerations.

Here is a picture of the bottom of the pcb, which the files are for. They made large voltage traces, which along with what the application note says in the datasheet.

If someone wants to take the files and do a group order, I would buy a few boards to try out.

EDIT: I realized that was the wrong picture, and I will post a different one...

--
Brian

[BrianGT]

Here is the composite view. The pcb pictures are too dark to show the traces.

It looks like a nice pcb design.

--
Brian

[BrianGT]

Here is the top view of the pcb... The mute switch could be bypassed, and the socket not used.

Getting a batch of these made would be the easiest way to try out this interesting new IC.

--
Brian

[Peter Daniel]

Is it better to try it in parallel or bridged mode? Could do it today

[bigparsnip]

Why is this in the pass section?

[BrianGT]

Originally posted by bigparsnip
Why is this in the pass section?

I have no idea... I thought that I posted it in the Chip amps forum... but I must have made a mistake. Can a moderator please move it for me?

--
Brian

[BrianGT]

Originally posted by Peter Daniel
Is it better to try it in parallel or bridged mode? Could do it today

I was going to try it in parallel mode, with my 4 ohm speakers. If you have 8 ohm speakers, you could try it bridged.

--
Brian

[Peter Daniel]

Originally posted by BrianGT


I have no idea... I thought that I posted it in the Chip amps forum... but I must have made a mistake. Can a moderator please move it for me?

--
Brian

I wondered why response was so poor, now I know

[digi01]

Hi BrianGT,that sound is good.
have you plan to make a pcb layout now?I am interested too, but uncertain 4780 of the quality is worth. . .
I will test it in a sample p2p modes first

indeed,I have a project now.any suggestions?
the attach file is PDF (top+silk+bottom)

[BrianGT]

Originally posted by digi01
Hi BrianGT,that sound is good.
have you plan to make a pcb layout now?I am interested too, but uncertain 4780 of the quality is worth. . .
I will test it in a sample p2p modes first

indeed,I have a project now.any suggestions?
the attach file is PDF (top+silk+bottom)

I have been considering making a layout for it, but the National layout is quite a nice one, and it would be good for trying the chip out. It would allow for an easy way to try it out.

--
Brian