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January 2013

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Subject:
From:
"Nutting, Phil" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Nutting, Phil
Date:
Thu, 3 Jan 2013 16:50:30 +0000
Content-Type:
text/plain
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text/plain (86 lines)
Inge,

Found it at:

http://training.ti.com/courses/CourseDescription.asp?iCSID=50691

You will need to sign in, but it is FREE!

Phil

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge Hernefjord
Sent: Thursday, January 03, 2013 11:31 AM
To: [log in to unmask]
Subject: Re: [TN] 200A Connections to PCB

'I  was responsible for all connections,contacts and connectors for a period. I had to change opinion about this topic! It's a LOT to learn. From this time I dare insist:

1. Forget circular wires
2. Use flat and insulated 'cable' (or high current braid when high flex is
needed)
3. Braze!

If you can find Robert Kollman's 'Constructing Your Power Supply-Layout Considerations' Texas Instrument , you may find further advice about current calculations.

Inge


On 3 January 2013 16:31, Robert Kondner <[log in to unmask]> wrote:

> Hi,
>
>
>
> I was wondering if anyone had suggestions about making high current 
> connections to a PCB.
>
>
>
> I am working with a design for a 2KW DC to AC converter. Input current 
> will reach about 200 amps. The PCB will be a heavy copper single sided 
> Aluminum PCB much like that used for high power LED apps. Conductor 
> temp rise is not an issue as the thermal conduction to the Al base is 
> very high and the base is on a heat sing. The FETs will dump much more heat than the copper.
>
>
>
> The problem is bringing wire terminations to the PCB. Any Ideas? The 
> Al base is applied against a heat sink so using through board type 
> studs or bolt is difficult. I am considering the use of a couple of 
> Keystone screw terminals with their legs cut off. The bodies could 
> then be SMT reflowed to the copper planes.
>
>
>
> http://www.keyelco.com/products/specs/spec186.asp
>
>
>
> Any other ideas out there?
>
>
>
> Thanks,
>
> Bob K.
>
>
>
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