Trace width

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hmlittle59
Posts: 77
Joined: 14 Jun 2010, 15:29

Trace width

#1 Post by hmlittle59 » 11 Nov 2016, 06:29

Hello All,
Have to much "Current" being draw on my PCB. Input Resistor burnt up (oops), my question is, how wide should my "Input Trace" be for 2 amp draw? I got some "google" data, but want to know from yall. Also, should the 5v Trace around my (4 x 3) be set to a minimum?

1) Input Trace (width)
2) 5v Trace around the PCB (width)

Just ordered 2amp input resistor and 5v 3amp regulator.
May add a 2nd 5v reg. to handle the Serial/Parallel Display(s).

Thanks for any insight/help

Howard

Tomg
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Posts: 2028
Joined: 20 Jun 2015, 07:39

Re: Trace width

#2 Post by Tomg » 11 Nov 2016, 07:10

The only help I can think of is this web-based calculator - http://circuitcalculator.com/wordpress/ ... alculator/
Tom

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KevinA
Posts: 639
Joined: 18 Dec 2015, 08:35

Re: Trace width

#3 Post by KevinA » 11 Nov 2016, 07:17

Neat question: http://circuitcalculator.com/wordpress/ ... alculator/
On a board with 1.6 ounce copper 1.27mm will handle 2 amp on an internal layer and .488mm on an external layer.
With my DRC trace width set to .15mm I would need to build a net class for the net carrying the power to the consumer of that current.

And while I was typing Tomg beat me to the enter key!
Google is our friend....

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gen3eng
Posts: 8
Joined: 06 Apr 2015, 12:17
Location: Orange County, CA USA
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Re: Trace width

#4 Post by gen3eng » 11 Nov 2016, 07:21

This is my favorite free calculator. It uses the latest IPC-2152 standard for multilayer board (takes adjacent plane layers into account). It has lots of other related calculators as well.

https://www.saturnpcb.com/pcb_toolkit.htm

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