but there is a strong tempco with this technique
Dennis Saputelli

Brad Velander wrote:
> 
> Juha,
>         seems you are looking for a highly specialized part. Have you
> considered doing your resistance as a short section of PCB trace? For
> example a 0.020" wide trace, 1 oz CU, of 0.161 inches in length will give
> you a resistance of 0.00399 ohms according to some calculators. This length
> would probably need to be tweaked according to you PCB specs and the
> fabricators typical tolerances. A lot of current sense devices have
> application notes which suggest using specific lengths of traces for your
> sense circuit.
> 
> Sincerely,
> Brad Velander.
> 
> Lead PCB Designer
> Norsat International Inc.
> #300 - 4401 Still Creek Drive,
> Burnaby, B.C., Canada, V5C 6G9.
> Tel   (604) 292-9089 (direct line)
> Fax  (604) 292-9010
> Website: www.norsat.com
> 
> -----Original Message-----
> From: Juha Pajunen [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, January 22, 2002 4:37 AM
> To: Protel EDA Forum
> Subject: [PEDA] Looking for a resistor supplier.
> 
> Hi,
> 
> Looking for 0.004R (2512 footprint, 1-2W) sense resistor for switching power
> supply, can you help me?
> I have one (IRC LRF 2512-01-R004-J http://www.welwyn-tt.com/lrc_fr.htm ) but
> distributor says that you have to get 1800 (I need 100-200), you know where
> can get less?
> 
> Sincerely,
> Juha Pajunen, Hw Engineer
> Bitboys Oy
> E-mail: [EMAIL PROTECTED]

-- 
___________________________________________________________________________
www.integratedcontrolsinc.com            Integrated Controls, Inc.    
   tel: 415-647-0480                        2851 21st Street          
      fax: 415-647-3003                        San Francisco, CA 94110

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* To post a message: mailto:[EMAIL PROTECTED]
*
* To leave this list visit:
* http://www.techservinc.com/protelusers/leave.html
*
* Contact the list manager:
* mailto:[EMAIL PROTECTED]
*
* Forum Guidelines Rules:
* http://www.techservinc.com/protelusers/forumrules.html
*
* Browse or Search previous postings:
* http://www.mail-archive.com/proteledaforum@techservinc.com
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

Reply via email to