PSU Design Check Please

ANDYLASER · 14th June 2008, 10:43 AM

I am thinking of making a small batch of PCB's for a universal amplifier PSU. I would be greatfull if you could check my design before I progress further. Thanks.

Component values are likely to change, I have just allowed for the bigest I may need.

peranders · 14th June 2008, 10:47 AM

Are you aware of that we already have a such thread? You could specify by yourself a PSU and see if the members here like it.

(Why do you write in CAPITALS in your profile? This means normally that your are SHOUTING or you are an american lawyer

)

ANDYLASER · 14th June 2008, 11:28 AM

Writing in capitals was an old habit of mine from when I use dto teshnical drawings (on paper). Sometimes it does not seem wrong to me. I will change it though.

I couldnt find the thread you mentioned.

AndrewT · 14th June 2008, 11:44 AM

Hi,
that will work.
22mF 80V are not cheap.
What voltage are you planning?

ANDYLASER · 14th June 2008, 12:36 PM

I was planning on using this for a couple of different projects I have on the go. One requires +/- 40V, the other +/- 65V. I doubt I will use 22mf caps, more than likely 10mf will suffice. I just thought that it wouldnt hurt to plan the boards to take the larger cans if required.

Here is a link to the board layout.

Board Layout

AndrewT · 14th June 2008, 12:40 PM

40Vac giving about 58Vdc works for 63V rated smoothing caps, saving a lot of money and space.

ANDYLASER · 14th June 2008, 12:46 PM

I completely agree. But the larger amp will reguire the bigger caps. I thought it would be easier to product 1 multi purpose board rather than 2 different ones. Especially as I will probably need to order sufficient to use a sheet of material, maybe 12 -15 boards.

I am thinking of selling a few of the excess to recoup some of the costs. A more "adaptable" board may possibly find a few extra takers.

jtkraj · 24th June 2008, 01:57 PM

I think you should choose a Caps which will optimize the design. choosing a very high value caps are not necessary for this kind of application.

What is the current rating you are thinking of offering? Calculate caps which will give lesser than specified ripple noise.

you can even use an inductor in series, still the cost will be lesser that using 22mF caps.

ANDYLASER · 14th July 2010, 10:21 PM

Finally got round to doing a track layout. Any critique welcome.

nigelwright7557 · 14th July 2010, 10:39 PM

Why have you used 8 diodes when you can do the job with 4 or 1 bridge ?

14th June 2008, 10:43 AM	#1
ANDYLASER diyAudio Member Join Date: Oct 2005	PSU Design Check Please I am thinking of making a small batch of PCB's for a universal amplifier PSU. I would be greatfull if you could check my design before I progress further. Thanks. Component values are likely to change, I have just allowed for the bigest I may need.

14th June 2008, 10:47 AM	#2
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	Are you aware of that we already have a such thread? You could specify by yourself a PSU and see if the members here like it. (Why do you write in CAPITALS in your profile? This means normally that your are SHOUTING or you are an american lawyer ) __________________ /Per-Anders (my first name) or P-A as my friends call me Tube Buffered Gainclone in work \|Thread

14th July 2010, 10:39 PM	#10
nigelwright7557 diyAudio Member Join Date: Apr 2008 Location: Carlisle, England	Why have you used 8 diodes when you can do the job with 4 or 1 bridge ? __________________ http://www.murtonpikesystems.co.uk PCBCAD50 pcb design software.

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14th June 2008, 11:28 AM	#3
ANDYLASER diyAudio Member Join Date: Oct 2005	Writing in capitals was an old habit of mine from when I use dto teshnical drawings (on paper). Sometimes it does not seem wrong to me. I will change it though. I couldnt find the thread you mentioned.

14th June 2008, 11:44 AM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, that will work. 22mF 80V are not cheap. What voltage are you planning?

14th June 2008, 12:36 PM	#5
ANDYLASER diyAudio Member Join Date: Oct 2005	I was planning on using this for a couple of different projects I have on the go. One requires +/- 40V, the other +/- 65V. I doubt I will use 22mf caps, more than likely 10mf will suffice. I just thought that it wouldnt hurt to plan the boards to take the larger cans if required. Here is a link to the board layout. Board Layout

14th June 2008, 12:40 PM	#6
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	40Vac giving about 58Vdc works for 63V rated smoothing caps, saving a lot of money and space.

14th June 2008, 12:46 PM	#7
ANDYLASER diyAudio Member Join Date: Oct 2005	I completely agree. But the larger amp will reguire the bigger caps. I thought it would be easier to product 1 multi purpose board rather than 2 different ones. Especially as I will probably need to order sufficient to use a sheet of material, maybe 12 -15 boards. I am thinking of selling a few of the excess to recoup some of the costs. A more "adaptable" board may possibly find a few extra takers.

24th June 2008, 01:57 PM	#8
jtkraj diyAudio Member Join Date: Jun 2008	I think you should choose a Caps which will optimize the design. choosing a very high value caps are not necessary for this kind of application. What is the current rating you are thinking of offering? Calculate caps which will give lesser than specified ripple noise. you can even use an inductor in series, still the cost will be lesser that using 22mF caps.

14th July 2010, 10:21 PM	#9
ANDYLASER diyAudio Member Join Date: Oct 2005	Finally got round to doing a track layout. Any critique welcome.

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