Regulated PSU PCB

[D_GR8_1]

I am designing a PCB based on carlosfm's thread in regards to Regulated PSUs.

The attached screenshot is of half the board. The other half will be a mirror image. The intention here is to get feedback on my current design and how I can improve it before I go and do the other half.

This design is for DIY only, and I will not be making it commercially avalable, so now that we got that out of the way, please fellas, post your comments.

Thanks!

 

[digi01]

what about the U1?I recommend that you should leave some rooms for set up U1's heatsink.

digi

 

[D_GR8_1]

There is room

The actual heatsink will be U-shaped with the fins extending to the front of the regulator.

The only reason I put them so close together is because carlosfm suggested that C3 should be as close to the regulator as physically possible.

 

[D_GR8_1]

finished

here is the finished product:

 

[D_GR8_1]

and a 3D view

And this is what it might look like:

 

[Roushon]

In my opinion the left side of the board can be made simpler (and this will make the board small) if the following idea is used.

 

[D_GR8_1]

I see your point, however the way you see it there, it is because of the actual PCB connector that I will be using for the incoming AC from the toroid.

Here is the part:

 

[Luke]

Hi D_GR8_1

I like your connector, where did u get it and how much are they?

regards Arthur

 

[D_GR8_1]

Jaycar

They are available in Jaycar and are about AUS$3-4.

I am actually getting all my supplies from a Jaycar supplier, a company called Electus, where everything is half-price!

 

[jleaman]

no offence . but digi's are smaller and would work better small mans smaler chassis. and on the other note you can use peter daniel's SUPERB chassis. : O )

 

[D_GR8_1]

yeah well, my 10000uF rectifier capacitor measures 35mm diameter and 50mm height. Putting two of them on a PCB makes the PCB at least 70mm wide.

Digi01's boards are smaller due to the fact that he uses two boards where I would use one and also there are no PCB terminals. You solder everything onto the PCB.

The reason it is that big is mainly because I'm using premium components and all my caps are rated at 400V.

 

[Luke]

Hi D_GR8_1

how do I get stuff from Electus, do they do mail/web orders?

cheers arthur

 

[jleaman]

yeah well, my 10000uF rectifier capacitor measures 35mm diameter and 50mm height. Putting two of them on a PCB makes the PCB at least 70mm wide.

Digi01's boards are smaller due to the fact that he uses two boards where I would use one and also there are no PCB terminals. You solder everything onto the PCB.

The reason it is that big is mainly because I'm using premium components and all my caps are rated at 400V.

Very true his do require 2 boards : O )

BUt im still looking for a regulator for 45V it's hard. but i'll continue : O )

 

[Upupa Epops]

Simply is better

Guys, why do you make all separate ? Isn't any problem to make both ( PA + PS ) together on common PCB and common heatsink. This solution have two advantages : shorter rail lines and easyly mounting without errors.

 

[D_GR8_1]

Hi D_GR8_1

how do I get stuff from Electus, do they do mail/web orders?

cheers arthur

Well first of all you need an ABN(Australian Business Number) or whatever the NZ equivalent is.

Then you go to their website
Electus

order your free catalogue and order away. I beleive that they have a store in NZ.

 

[Upupa Epops]

To Jason : Are you searching 45 V regulator ? Look at dataseet of LM 317 HV. With this regulator + one power transistor you can get easy 10 A output current.

 

[moving_electron]

BUt im still looking for a regulator for 45V it's hard. but i'll continue : O )

I am a little confused. Do you want to get 45V regulated out of the regulator? What are you putting into it?

If I understand right the regulators are rated base on the drop from input to output as opposed to the absolute output voltage.

Or are you trying to drop from say 45v in to 30v regulated?

 

[D_GR8_1]

Sorry JasonL, but I think we are going a bit out of topic here.

The question I ask is for all you guys who are more experts that the rest of us mere mortals to comment on the design.

How can I improve it? Are the POWER/GND tracks the right place, the right size, and so on.

Also, Upopa, if I designed everything on 1 board, i.e PS/PA, arent I risking of introducing some noise into the amp?

 

[Greg Erskine]

Hi D_GR8_1,

I found this on their website.

Electus Distribution Pty. Ltd. (formerly John Carr & Co. Pty. Ltd.)

John Carr -> J. Carr -> Jaycar What do you think? Electus is probably Jaycar's distribution company? And the product codes look very familiar.

 

[Upupa Epops]

If all will be designed correct ( strictly symetricaly designed PCB, star ground etc. ) , SNR will be on " border " value . Try it, I will help you .