Can Class D be built on a single side PCB??? - diyAudio
Go Back   Home > Forums > Amplifiers > Class D
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Class D Switching Power Amplifiers and Power D/A conversion

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 2nd January 2007, 12:48 AM   #1
Leolabs is offline Leolabs  Malaysia
diyAudio Member
Leolabs's Avatar
Join Date: Dec 2004
Location: Bukit Mertajam
Send a message via MSN to Leolabs
Default Can Class D be built on a single side PCB???

Saw that many are built on double side PCB,have anyone try single side only???
  Reply With Quote
Old 2nd January 2007, 12:55 AM   #2
zilog is offline zilog  Sweden
diyAudio Member
Join Date: Oct 2005
You can, but it will perform much worse. That is, assuming that you would otherwise use the second side of a 2-side PCB as an uninterrupted ground plane which greatly reduces PCB track inductances.
  Reply With Quote
Old 2nd January 2007, 04:39 PM   #3
BWRX is offline BWRX  United States
diyAudio Moderator Emeritus
Join Date: Jan 2005
Location: Pennsylvania
You can build a class d amp on a breadboard if you want. How well it works depends on how well you construct it. How well a design works on a 1 layer board will also depend on how well the board is routed. 2 layers gives you more freedom and is usually the minimum number of layers you'd want to use if you're going to have boards made by a board house.
  Reply With Quote
Old 3rd January 2007, 04:34 PM   #4
diyAudio Member
Join Date: Jan 2007
Try double layer ,you will not suffer as much as i did.
  Reply With Quote
Old 4th January 2007, 06:18 AM   #5
diyAudio Member
Join Date: May 2002
Location: Switzerland
The PCB is one of the most important components of a switching amp. A bad PCB (i.e. construction, layout etc) will make an amp perform worse than what would be potentially possible with a given circuit.

So you can definitely build an amp on a single-sided PCB in order to check if the circuit as such is working - but keep in mind that the time you spend on this might be better used for a first "proper" prototype. But you will not be able to get reliable performance measurements this way.


  Reply With Quote
Old 4th January 2007, 06:36 AM   #6
zilog is offline zilog  Sweden
diyAudio Member
Join Date: Oct 2005
I am waiting to get my new set of PCB:s manufactured, this will be the first time I use uninterrupted ground planes as compared to my groundplanes everywhere-approach in my last amplifier.

Will be nice to see the differences now when I know how the last one performed.
  Reply With Quote
Old 9th January 2007, 11:43 AM   #7
fumac is offline fumac  China
diyAudio Member
Join Date: Oct 2006
Send a message via MSN to fumac
i have built it 4X80W single side pcb
but it's a hard work
  Reply With Quote
Old 10th January 2007, 06:27 AM   #8
kcchow is offline kcchow  Hong Kong
diyAudio Member
Join Date: Jan 2007
It is not a good idea to use single side PCB! I designed over 10 projects using 5-6 kinds of class-D/class-T amplifier but all of them need to use double layer PCB!
  Reply With Quote
Old 10th January 2007, 08:51 AM   #9
diyAudio Member
classd_fromru's Avatar
Join Date: Nov 2006
I build my first UcDs on a single-side PCB, its work fine

But now i trying to use 2-side pcb, its better:
  Reply With Quote
Old 12th January 2007, 03:09 PM   #10
diyAudio Member
Join Date: Dec 2003
Location: Munich
From my perception it might also depend on the power which you are adressing.
I am currently struggling even with my double sided board. But my currents are high. Somewhere around 40A output current the generated noise seems to trigger undesired shut downs. At this level the di/dt in the switching devices and related rail capacitors is ranging between 500A/us to 1000A/us.
Already quite small inductances do cause remarkable voltage drops. Furtheron such powerful and fast di/dt do induce unpleasant voltage peaks in all tracks nearby...

....from what I see on my board, I would expect that you can handle amps with output currents up to 10A peak (may be 15A) with on a single sided PCB.
Things are getting generally easier, if you are willing to reduce switching speed. Please note switching speed does not just mean the operating frequency. It is more about the dv/dt and especially di/dt in the switching devices.
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Another Single Side LM4780 Board.. Dxvideo Chip Amps 16 4th December 2012 07:43 PM
Single side PCB for PA100 zafira1981 Chip Amps 4 16th May 2006 12:02 AM
LM4780 Single side PCB bill1961 Chip Amps 73 3rd March 2006 04:31 PM

New To Site? Need Help?

All times are GMT. The time now is 04:06 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2