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'Source for Small PCB Transformers'
1999\01\06@183822 by Mike Chaloupka

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Having difficulties locating a source for small footprint (at or under 1inch square) PCB transformers

7-12v, 200-400ma range 110/220.

Does anyone have any suggestions?

Oh,  under $6.00......

TIA



Michael Chaloupka
Sverdrup Technology
Bus 850 609-2111
Fax 850 651-5515

1999\01\06@185718 by William Chops Westfield

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   Having difficulties locating a source for small footprint (at or under
   1inch square) PCB transformers
   7-12v, 200-400ma range 110/220.
   Does anyone have any suggestions?

Does such a thing exist?  I thought to get that sort of power through that
size of magnetic thingy, you had to go to frequencies well over 60Hz.

There are some "line powered" 5V switchers that are in that size range, I
think.  Maybe only 5V output, though.  (The original press release (company
forgotten, I'm afraid) showed a 5V supply built into a 3prong molded plug.)

BillW

1999\01\06@215216 by Steve Tomes

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Try switchers...they are great!!!!and are smaller then you will get with a
xformes..and learning to use them is a snap with all the free downloads
avalabile

1999\01\07@083626 by wwl

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On Wed, 6 Jan 1999 21:49:08 -0500, you wrote:

>Try switchers...they are great!!!!and are smaller then you will get with a
>xformes..and learning to use them is a snap with all the free downloads
>avalabile
Unfortunately they're a lot more expensive, and the safety and EMC
approval issues are somewhat more involved.

1999\01\07@095721 by Brian Aase

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face
You might want to look at:

http://www.advancedcomponents.com

or

http://www.premmag.com

or

http://www.signaltransformer.com

Advanced and Signal will sell as few as just one transformer,
normally with off-the-shelf delivery.  (Maybe Prem does too, I
have never asked them.)

1999\01\07@121637 by Mike Chaloupka

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Perhaps I missled you, My application is a related to a hottub controller with interfaces into the tub and user keypads.. I need isolation for protection purposes.  

I plan to use a standard power supply design, xformer, 7805, rectifer, caps... so a transformer in the range of 2.5VA is desirable.  

Are switchers safe for my kind of application?   I was originaly using a max 610 for a transformerless design until the marketing guy added new requirements......

>>> William Chops Westfield <spam_OUTbillwTakeThisOuTspamCISCO.COM> 01/06 5:56 PM >>>
   Having difficulties locating a source for small footprint (at or under
   1inch square) PCB transformers
   7-12v, 200-400ma range 110/220.
   Does anyone have any suggestions?

Does such a thing exist?  I thought to get that sort of power through that
size of magnetic thingy, you had to go to frequencies well over 60Hz.

There are some "line powered" 5V switchers that are in that size range, I
think.  Maybe only 5V output, though.  (The original press release (company
forgotten, I'm afraid) showed a 5V supply built into a 3prong molded plug.)

BillW

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