Forums

Looking for DC/DC converter

Started by Meindert Sprang March 4, 2004
Hi all,

My application needs a double DC/DC converter, 5V in, dual isolated 5V out,
1W. The NMD050505S from C7D Technologies is very suitable but I want to go
one step further: my application would still need a voltage regulator before
the DC/DC converter to accomodate input voltages from 8-30V. What I would
like is a DC/DC converter that accepts 8-30V input and produces dual
isolated 5V. Any ideas/pointers? I know I could use a standard SMPS IC and
use an appropriate transformer but I would like to buy an off the shelf
solution.

Meindert


"Meindert Sprang" <mhsprang@NOcustomSPAMware.nl> wrote in message
news:40472eaa@news.nb.nu...
> Hi all, > > My application needs a double DC/DC converter, 5V in, dual isolated 5V
out,
> 1W. The NMD050505S from C7D Technologies is very suitable but I want to go > one step further: my application would still need a voltage regulator
before
> the DC/DC converter to accomodate input voltages from 8-30V. What I would > like is a DC/DC converter that accepts 8-30V input and produces dual > isolated 5V. Any ideas/pointers? I know I could use a standard SMPS IC and > use an appropriate transformer but I would like to buy an off the shelf > solution. >
Did you check powerone? They have some nice modules...a bit pricey though.
how many do you want, how quick do you need them?
"CBarn24050" <cbarn24050@aol.com> wrote in message
news:20040305005832.02011.00000994@mb-m19.aol.com...
> how many do you want, how quick do you need them?
50-100 per month. Starting from now. Meindert
Doesn't /didn't Burr-Brown make a similar item ???
j


"j.b. miller" <invalidjbmiller@cogeco.ca> wrote in message
news:HSO5c.6711$R37.5962@read1.cgocable.net...
> Doesn't /didn't Burr-Brown make a similar item ???
Burr-Brown, now acquired by TI, only has high power converters, I only need 1 watt. Meindert
On Wed, 17 Mar 2004 07:48:53 +0100, "Meindert Sprang"
<mhsprang@NOcustomSPAMware.nl> wrote:

>"j.b. miller" <invalidjbmiller@cogeco.ca> wrote in message >news:HSO5c.6711$R37.5962@read1.cgocable.net... >> Doesn't /didn't Burr-Brown make a similar item ??? > >Burr-Brown, now acquired by TI, only has high power converters, I only need >1 watt. > >Meindert >
Not true. There are excellent BB 1W (DCP01) and 2W (DCP02) isolated converters available in standard DIP and SO packages, and we use them extensively. Unfortunately, they don't have the wide input range that you are looking for in this application. ================================ Greg Neff VP Engineering *Microsym* Computers Inc. greg@guesswhichwordgoeshere.com
"Greg Neff" <greg@microsym.com> wrote in message
news:8k3h501cnrd2ntvacvkjl97uuogpj2dr32@4ax.com...
> On Wed, 17 Mar 2004 07:48:53 +0100, "Meindert Sprang" > <mhsprang@NOcustomSPAMware.nl> wrote: > > >"j.b. miller" <invalidjbmiller@cogeco.ca> wrote in message > >news:HSO5c.6711$R37.5962@read1.cgocable.net... > >> Doesn't /didn't Burr-Brown make a similar item ??? > > > >Burr-Brown, now acquired by TI, only has high power converters, I only
need
> >1 watt. > > > >Meindert > > > > Not true. There are excellent BB 1W (DCP01) and 2W (DCP02) isolated > converters available in standard DIP and SO packages, and we use them > extensively. Unfortunately, they don't have the wide input range that > you are looking for in this application.
Ok, I seemed to have missed those on the TI website (horrible beast anyway). I'll do a search on the typenumbers you mentioned. Thanks, Meindert
Meindert Sprang wrote:
> > "Greg Neff" <greg@microsym.com> wrote in message > news:8k3h501cnrd2ntvacvkjl97uuogpj2dr32@4ax.com... > > On Wed, 17 Mar 2004 07:48:53 +0100, "Meindert Sprang" > > <mhsprang@NOcustomSPAMware.nl> wrote: > > > > >"j.b. miller" <invalidjbmiller@cogeco.ca> wrote in message > > >news:HSO5c.6711$R37.5962@read1.cgocable.net... > > >> Doesn't /didn't Burr-Brown make a similar item ??? > > > > > >Burr-Brown, now acquired by TI, only has high power converters, I only > need > > >1 watt. > > > > > >Meindert > > > > > > > Not true. There are excellent BB 1W (DCP01) and 2W (DCP02) isolated > > converters available in standard DIP and SO packages, and we use them > > extensively. Unfortunately, they don't have the wide input range that > > you are looking for in this application. > > Ok, I seemed to have missed those on the TI website (horrible beast anyway). > I'll do a search on the typenumbers you mentioned.
I find that I can do a much better search as some of the distis. I normally start with Digikey and sometimes Mouser. Digikey is great as they have pretty much everything in their data base categorized, so if you do a search on a partial number or description, you don't just get a million hits, you get a list of categories. Clicking on one gives you a parametric selection guide that actually *means* something normally. I wrote to them about how it can be hard to select parts by temperature range and they said they are in the process of adding that! Too bad other vendors can't seem to learn from Digikeys innovation in this area, both disti's and manufacturers. -- Rick "rickman" Collins rick.collins@XYarius.com Ignore the reply address. To email me use the above address with the XY removed. Arius - A Signal Processing Solutions Company Specializing in DSP and FPGA design URL http://www.arius.com 4 King Ave 301-682-7772 Voice Frederick, MD 21701-3110 301-682-7666 FAX
In article <4058A0B3.E95C88A5@yahoo.com>
           spamgoeshere4@yahoo.com "rickman" writes:

[X%]

> Too bad other vendors can't seem to learn from Digikeys innovation in > this area, both disti's and manufacturers.
I have recently had both the RS Components and Farnell reps around. To both I gave a longish list of things that would improve their web based catalogues and make things easier for those of us looking for suitable components to fulfil a function in the latest project. As one who is always looking for isolation components I can sympathise with others who find the same difficulty. The BB parts are good if a bit pricy at times. However, there are other companies around who do similar DC-DC converters. Look on RS Components web-site (www.rsw.com??) sorry, away from works machine at present. -- ******************************************************************** Paul E. Bennett ....................<email://peb@amleth.demon.co.uk> Forth based HIDECS Consultancy .....<http://www.amleth.demon.co.uk/> Mob: +44 (0)7811-639972 .........NOW AVAILABLE:- HIDECS COURSE...... Tel: +44 (0)1235-811095 .... see http://www.feabhas.com for details. Going Forth Safely ..... EBA. www.electric-boat-association.org.uk.. ********************************************************************