scratch BPA200 pcb lay out

[TS Lo]

Hi Zang,

I like to have two boards,
please count me in.

Thanks

TS

 

[digi01]

you are welcome.PM sending...😎


Z

 

[troystg]

Hi Zang-

If I'm reading this correct, you have had boards made.

May I get a pair of them?

And are you selling a parts "kit" also?

I think they will go very well in my chassis.

 

[sklimek]

Hi Zang, they look great! Thank you for your hard work and sharing. Can't wait to get my two boards.
Best - Stan

 

[troystg]

Re: Re: I would wish view your pcb for BPA200

the upper thing of the photo is a chinese pencil😉 Zang

Zang you know I love your work, but I have to pick on you..

So what's the difference between a Chinese pencil and a "regular" pencil? I would assume just the decorations on the out side?

I'm glad to see you active on the forum again. 🙂

 

[BrianGT]

Zang,

Looks great, just as your previous boards!

I look forward to trying this out 🙂

--
Brian

 

[transducer]

Hi Zang,

I'd like to know how much for 2 boards would be including shipping to Canada.

Thanks!

Ron

 

[digi01]

thanks all🙂 I am happy!

and sorry for slow response,I am very busy for spring exam.hopefully it could be passed smoothly


P.S.
here is PDF version,including some others project.

http://digi01.hk.st


Z

 

[motherone]

Digi,

Have you considered doing a BPA layout using the 4780? Half the chips would be needed!

Mike

 

[slackman]

Maybe half the chips but the thermal power for one lm4780 can reach values so that your'e in need of a cooling fan. It's much better to spread the power discipation to more chips!

(For ex. you can't use the LM4780 in bridged configuration without a fan. Even a giant heatsink couldn't take all the heat the LM4780 produces in bridged mode; the contact area of the chip is too small. For me only PA-equipment should be cooled with a fan.)

 

[motherone]

Maybe half the chips but the thermal power for one lm4780 can reach values so that your'e in need of a cooling fan. It's much better to spread the power discipation to more chips!

(For ex. you can't use the LM4780 in bridged configuration without a fan. Even a giant heatsink couldn't take all the heat the LM4780 produces in bridged mode; the contact area of the chip is too small. For me only PA-equipment should be cooled with a fan.)

Making two boards, each paralleling three chips ("6" total), then bridging the two boards, should be able to handle it. Or if you don't feel like getting that fancy, parallel 2 chips ("4" amps total), then bridge those.

I know there are some folks using BrianGT's LM4780 kit in BPA without fans.

 

[digi01]

Digi,
Have you considered doing a BPA layout using the 4780? Half the chips would be needed!
Mike

thank you,I would not take more time on chip amp.I am going to digital & solid 🙂


P.S.
All per order has send out,feel happy to test it and post your review and comment. THANKS😎

Zang

 

[digi01]

mine bpa200 is in progress.

case and heatsink below.

 

[digi01]

chips detail,

I have order all parts,Now waiting them arrived.

 

[TS Lo]

Hi Zang,

I'm still waiting for arrival of my boards, however
when I trace the copper track on the PCB in the photos
attached in Post 18, it indicates that the U7 output is
connected to the NI input (pin 10 via pin 11) of all 4
power chips (U1 - U4).

Please clarify

Thanks

TS

 

[digi01]

when I trace the copper track on the PCB in the photos
attached in Post 18,...

thank you mention it🙂I have got a big prize the eval board has a bug.I have check out it.


rgds
Zang

 

[peranders]

How has this project gone? Is the pcb debugged and running?

 

[digi01]

P-A,the pcb has completed debugged,I have made some fine boards.

Zang

 

[Kravchenko_Audio]

So now that you have our attention....

[/FONT] Where are the pictures????? 😀 😀 😀 😀 😀 😀 😀 😀 😀 😀 😀


MArk

 

[Kravchenko_Audio]

So now that you have our attention....

Where are the pictures????? 😀 😀 😀 😀 😀 😀 😀 😀 😀 😀 😀


MArk