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'[EE] gate drive transformers'
2006\07\09@191211 by Martin K

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Does anyone have any source recommendations for gate drive transformers?
Coilcraft wants $6.50 for a 1:1:1 transformer. I know I can get free
samples but I'm looking for something that wouldn't be ridiculously
expensive for low-volume use.

Thanks.
--
Martin K

2006\07\09@194230 by Bob Blick

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On 9 Jul 2006 at 19:12, Martin K wrote:

> Does anyone have any source recommendations for gate drive transformers?
> Coilcraft wants $6.50 for a 1:1:1 transformer. I know I can get free
> samples but I'm looking for something that wouldn't be ridiculously
> expensive for low-volume use.

For triacs or MOSFETs?

Cheers,

Bob

2006\07\09@203826 by Martin Klingensmith

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MOSFETs
I'd really like a 5 winding (1:1:1:1:1) for a full bridge converter, but
also a set of 1:1:1s for a full bridge ZVT converter. I wound one of my
own on a surplus ferrite pot core but it's HUGE and impractical (works
well though).
Thanks for any info Bob.
--
Martin K

Bob Blick wrote:

{Quote hidden}

2006\07\10@004150 by Vasile Surducan

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Ask for a Digikey catalog (thei web page sucks) and take a look to the
coil sections. There are some ceaper transformers than Coilcraft. Do
you know why Coilcraft is expensive ? Because it has isolated package
on the coil and a resin inside. The coil will never made short
circuits and will not singing...
Maybe $6 is a good choice for some applications ?

greetings,
Vasile

On 7/10/06, Martin K <spam_OUTmartin-distlistsTakeThisOuTspamnnytech.net> wrote:
> Does anyone have any source recommendations for gate drive transformers?
> Coilcraft wants $6.50 for a 1:1:1 transformer. I know I can get free
> samples but I'm looking for something that wouldn't be ridiculously
> expensive for low-volume use.
>
> Thanks.
> --
> Martin K
> -

2006\07\10@184450 by Bob Blick
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> MOSFETs
> I'd really like a 5 winding (1:1:1:1:1) for a full bridge converter, but
> also a set of 1:1:1s for a full bridge ZVT converter. I wound one of my
> own on a surplus ferrite pot core but it's HUGE and impractical (works
> well though).

Don't know of any 5 winding ones, but for 1:1:1 look at mouser.com part
number 580-786028C about $1.50 in small qty. Various other inductances
available at the same price if you are running particularly fast/slow.
Also in SMD packages, change the suffix to MC.
Cheers,

Bob


2006\07\10@214501 by Jim Korman

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Vasile Surducan wrote:
> Ask for a Digikey catalog (thei web page sucks) and take a look to the
> coil sections. There are some ceaper transformers than Coilcraft. Do
> you know why Coilcraft is expensive ? Because it has isolated package
> on the coil and a resin inside. The coil will never made short
> circuits and will not singing...
> Maybe $6 is a good choice for some applications ?
>
> greetings,
> Vasile
>
> On 7/10/06, Martin K <.....martin-distlistsKILLspamspam@spam@nnytech.net> wrote:
>  
>> Does anyone have any source recommendations for gate drive transformers?
>> Coilcraft wants $6.50 for a 1:1:1 transformer. I know I can get free
>> samples but I'm looking for something that wouldn't be ridiculously
>> expensive for low-volume use.
>>
>> Thanks.
>> --
>> Martin K
>> --

2006\07\10@222138 by Mark Rages

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On 7/9/06, Vasile Surducan <piclist9spamKILLspamgmail.com> wrote:
> Ask for a Digikey catalog (thei web page sucks) and take a look to the
> coil sections. There are some ceaper transformers than Coilcraft. Do
> you know why Coilcraft is expensive ? Because it has isolated package
> on the coil and a resin inside. The coil will never made short
> circuits and will not singing...
> Maybe $6 is a good choice for some applications ?
>
> greetings,
> Vasile

What's wrong with the web page?  I've always thought it best of all
the electronic distributors.  Faint praise, I know.

Regards,
Mark
markrages@gmail
--
You think that it is a secret, but it never has been one.
 - fortune cookie

2006\07\11@232028 by Martin Klingensmith

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Thanks Bob.
I'm still surprised by suppliers' lack of interest in magnetics other
than 60Hz transformers, ethernet transformers, or inductors. I can't be
the only one who needs low volume SMPS transformers (or am I?)
Arnold has a nice selection of high-B capable toroids, but winding them
is a bear. I'd much rather wind a two-piece core but they tend to be
significantly more expensive anyway. I get the feeling a lot of these
companies aren't too interested in helping me unless I'm going to order
Qty. >1,000.

--
Martin K

Bob Blick wrote:

{Quote hidden}

2006\07\12@091809 by Alan B. Pearce

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>Does anyone have any source recommendations for gate drive
>transformers? Coilcraft wants $6.50 for a 1:1:1 transformer.
>I know I can get free samples but I'm looking for something
>that wouldn't be ridiculously expensive for low-volume use.

I have a couple of samples of Vanguard Electronics GD203. Haven't tried them
yet.

http://www.ve1.com/index.htm


2006\07\15@143121 by Martin K

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Thanks Bob!
They're backordered until late August, but they are the least expensive
ones I've found.
--
Martin

Bob Blick wrote:
{Quote hidden}

2006\07\18@232812 by Martin K

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FWIW:
I found that Coilcraft does have SMT 1:1:1 transformers for a reasonable
price ($1.x) in low quantity.
--
Martin K

Martin Klingensmith wrote:
{Quote hidden}

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