Q: PCB traces both sides ok? - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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 3rd December 2009, 01:13 AM   #1
iko is offline iko  Canada
diyAudio Moderator
iko's Avatar
Join Date: May 2008
Location: Toronto
Default Q: PCB traces both sides ok?

I've just finished the pcb design for a regulator I'm developing (see sig). The design is a one layer board. Just when I was about to choose the trace thickness (2oz) it occurred to me that I could make it a two layer board, and have the exact same traces on the top and bottom of the board, thus doubling the effective trace thickness. Then I could use the same board for even higher current.

I can't think of a reason why this shouldn't be done, but I thought I'd ask just in case I'm missing something.
  Reply With Quote
Old 3rd December 2009, 01:51 AM   #2
jcx is online now jcx  United States
diyAudio Member
Join Date: Feb 2003
Location: ..
you're proabably missing a superior layout where you could lower gnd impedance and greatly reduce magnetic field radiating loop area by intelligently using both sides for different tracks/gnd plane/fill
  Reply With Quote
Old 3rd December 2009, 02:25 AM   #3
diyAudio Moderator Emeritus
Iain McNeill's Avatar
Join Date: Oct 2007
Location: Santa Cruz, California
I agree. There's better things to do with the copper.
A solid ground plane has more benefits than trace resistance / 2.
  Reply With Quote
Old 3rd December 2009, 02:40 AM   #4
iko is offline iko  Canada
diyAudio Moderator
iko's Avatar
Join Date: May 2008
Location: Toronto
Perhaps the layout allows for more criticism.

It is the Vin -> Vout trace that could benefit from twice the copper thickness. I was thinking of 3-5A through the regulator. Maybe even more. The shunt mosfet is connected directly to the GND island, as are all the other high current parts. The remote sensing points have a separate connection.
Attached Images
File Type: png reg-v2n-5d.png (8.6 KB, 96 views)
  Reply With Quote
Old 3rd December 2009, 09:55 AM   #5
diyAudio Member
stormsonic's Avatar
Join Date: Aug 2008
IMHO, single layer, short traces, star connection type (where possible) and remote sensing is the correct way.
No need for ground plane, you are not working into RF range. Double layer and ground plane can introduce some capacitance & inductance in unpredictable way. Big ground plane for few connection points across that plane + remote sensing wires returning to ground plane at some point = ground loop
  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
How to repair fine traces? Kabeern Planars & Exotics 13 11th May 2009 01:23 PM
Traces in Ultiboard loovet Everything Else 1 29th November 2007 11:35 PM
building my first preamp - are the traces ok? adi81bv Chip Amps 28 23rd May 2007 03:26 AM
Do these scope traces mean something is oscillating? Saurav Tubes / Valves 23 5th August 2003 04:12 PM
Amp PCB traces style rborer Solid State 7 24th January 2002 08:49 PM

New To Site? Need Help?

All times are GMT. The time now is 07:39 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