Trouble finding available DC/DC converter modules.

T

Teece

Guest
Hi,

I am looking for some DC to DC converter modules for the project that I am
currently working on. I need 5 Volts , 3.3 Volts, 2.5 Volts and 1.2 Volts
(at 1.6 Amps, 3 Amps, 2.8 Amps and 10 Amps, respectively). The only one that
really needs "isolation" is the 5 Volt supply and if I can find "point of
load" converters for the 3.3 Volt, 2.5 Volt and 1.2 Volt supplies then they
can work off of the 5 Volt supply. I don't have to power budget to "blow"
much in linear regulators (all of these converters must work off of 48 Volts
DC input).

I am surprised that for all of the so-called manufacturers of converters
(off the shelf ones) there are so few with real deliverable product. I have
received quotes from many that give lead times of 8 to 12 weeks. That is
longer then my development cycle.

I have checked Digikey, but a lot of the ones that they carry do not have
"industry standard" footprints. If I use a converter with a non standard
footprint and it stops being available, then I am screwed.

If anyone has suggestions for manufacturers, I would appreciate the help. I
would love to make my own "switcher" but I don't have the development time
in my schedule.

Regards
Tom
tom_cip_11551@hotmail.com
 
Hi
In a recent project I have developed I had similar needs.
I have used the "brick" (1/8 will be enough for you) very common technology
for the isolated 48V --> 3.3/ 5V
and than I have used the TYCO (other vendors also available for this MSA
product) microLYNX very small SMD nonisolated Switching converters to
produce the other required low voltage supplies (LYNX family converts 3-5V
input to 2.5/1.8/1.3/etc/ )
Just don't forget to add the many InRush/protection/ EMI components required
on the 48V entry to comply with UL/ CE requirements.

Amnon
"Teece" <tipollone@sierra_NOSPAM_video.com> wrote in message
news:SKGdnRx64pr11Tfd4p2dnA@giganews.com...
Hi,

I am looking for some DC to DC converter modules for the project that I am
currently working on. I need 5 Volts , 3.3 Volts, 2.5 Volts and 1.2 Volts
(at 1.6 Amps, 3 Amps, 2.8 Amps and 10 Amps, respectively). The only one
that
really needs "isolation" is the 5 Volt supply and if I can find "point of
load" converters for the 3.3 Volt, 2.5 Volt and 1.2 Volt supplies then
they
can work off of the 5 Volt supply. I don't have to power budget to "blow"
much in linear regulators (all of these converters must work off of 48
Volts
DC input).

I am surprised that for all of the so-called manufacturers of converters
(off the shelf ones) there are so few with real deliverable product. I
have
received quotes from many that give lead times of 8 to 12 weeks. That is
longer then my development cycle.

I have checked Digikey, but a lot of the ones that they carry do not have
"industry standard" footprints. If I use a converter with a non standard
footprint and it stops being available, then I am screwed.

If anyone has suggestions for manufacturers, I would appreciate the help.
I
would love to make my own "switcher" but I don't have the development time
in my schedule.

Regards
Tom
tom_cip_11551@hotmail.com
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