Availability of Zetex components

[gewe]

I would like to build a LED driver circuit, to modify a torch. One of the reference designs from Zetex (as described in application note DN63) looks like a good starting point.

Unfortunately I can't find a supplier for the parts being used. My local electronics shop claims to have 67 suppliers. None of them have the ZXSC300E5, FMMT619 and ZHCS1000 from Zetex, and the DO1608P-683 from Coilcraft.

I noticed there are some Dutch members on this forum. Does anyone know where in the Netherlands I can buy these parts?

I am not interested in bulk, just small quantities. And no payment by credit card.

 

[LoneRebel]

This page tells you step by step what to do and where to buy the parts...

http://www.5thcolumn.org/zetex/project/

Also if you need more info there are tons of threads discussing the zetex circuit.

 

[remuen]

I buy my Zetex parts from Farnell.

The ArtNo's are:
</font><ul type="square">[*]<font size="2" face="Verdana, Arial">ZXSC300 = 3847986</font>[*]<font size="2" face="Verdana, Arial">FMMT617 = 549400</font>[*]<font size="2" face="Verdana, Arial">ZHCS1000 = 743781</font>[/list]<font size="2" face="Verdana, Arial">The ZHCS2000 diode mentioned by the ZLT guys seems not to be available her in Europe in small quantities.

----

Btw, this thread would belong into the Electronics section where you find some more threads dealing with these Zetex parts

 

[gewe]

Thanks for your response. Unfortunately it doesn't help me, because:
1. DigiKey and Radio Shack (as mentioned in http://www.5thcolumn.org/zetex/project/) are in the USA
2. I tried Farnell Netherlands. This is what it says after selecting the ZXSC300:

The following item(s) were deleted from the cart, since they are not available in this country:
3847986;

The ZXSC310 or ZXSC400 don't even show in the catalog.

 

[gibbled]

Darn! just got the parts together, the boards etched and now the web page is gone... any one know what happened to the 5thcolumn ??or know of a mirror? The google cache misses the pictures.

 

[CiTY]

I think I have it in a MS word doc. Send me an email with your address. Make sure you have enough space on the address, it's 816kb.

 

[gibbled]

Email sent, word doc received. Thanks again CiTY!
With the "help" of my two year old son I was able to mount all the major compnents today. hoping to get to the testing stage tomorrow

gibbled.

 

[CiTY]

Your welcome Gibbled, Have fun.
"gewe" are you all set with the parts? If not send me mail, I might be able to help.

 

[Scoper]

Digi-Key ( http://www.digikey.com ) is good for many Zetex parts.

I would like info on obtaining Coilcraft inductors.

 

[Doug S]

Originally posted by Scoper:

I would like info on obtaining Coilcraft inductors.

<font size="2" face="Verdana, Arial">Coilcraft does only direct sales. They do not have distributors.

http://www.coilcraft.com/index.cfm

 

[MrAl]

Hello there,

Im trying to find out what happened to the page:

http://www.5thcolumn.org/zetex/project/

If i can find out, ill post it here.
If not, i might be able to cover some of the issues
brought up on that page.

Take care and good luck with your LED circuits,
Al

 

[Scoper]

Here's most of it:

http://members.shaw.ca/isomorphic

I can't leave this up very long.

 

[gewe]

Originally posted by CiTY:
Your welcome Gibbled, Have fun.
"gewe" are you all set with the parts? If not send me mail, I might be able to help.

<font size="2" face="Verdana, Arial">Thanks, CiTY.
I just noticed something weird: I can't order the ZXSC300 from the Dutch site of Farnell, but I can from the Belgian or UK site. If, however, I look for the address of the Belgian branch, I get the Dutch address.

I think I will contact them on this. Depending on their answer I might accept your help.

 

[gewe]

Originally posted by MrAl:
Hello there,

Im trying to find out what happened to the page:

http://www.5thcolumn.org/zetex/project/

If i can find out, ill post it here.
If not, i might be able to cover some of the issues
brought up on that page.

Take care and good luck with your LED circuits,
Al

<font size="2" face="Verdana, Arial">Search Google for:
"5thcolumn" zetex project

First link it returns with: click "in cache". Don't know how long Google will keep it.

[EDIT]Oops, just noticed the cached version doesn't contain any images![/EDIT]

 

[CiTY]

gewe, would you like me to email you the word doc of this? Email me your address and leave about 1mb available.

 

[James S]

I'd be happy to mirror any of those sites on my site. While not infinite my email account is not measured so feel free to email me anything you like.

 

[Scoper]

As I posted above, you can download the 5thcolumn stuff from:
http://members.shaw.ca/isomorphic

 

[kingkong]

hi,
i am trying to build the circuit zLT+. what is the vaule of the inductor? can i use the 220uf instead of the 150uf?
Thanks,

 

[Lucien]

kingkong,

Using a larger capacitance value should be fine, however you'll want to watch out for the ESR rating of the cap. The lower the ESR, the lower the ripple voltage on the output (good thing). If the ESR is too high, then the ripple voltage would be big enough to cause a "pulsed" current higher than what the LS is rated for.

I have no idea what the inductor value is myself/ubbthreads/images/graemlins/confused.gif, and I'm also interested in finding that out too. Anyone know/have a LCR meter?

 

[gibbled]

I've been wondering about this too. reading through the zetex spec sheet reveals this:

Inductor selection
The inductor value must be chosen to satisfy
performance, cost and size requirements of the overall
solution. For the reference designs we recommend an
inductor value of 100uH with a core saturation current
rating greater than the converter peak current value
and low series resistance.

Haven't found a formula or value for l for the jw miller cores yet so can't calculate it that way.

I'm hoping to find a way to reduce the inductor size for driving one or two 5mm leds and shoehorn the works into a dorcy single aaa aluminum light.