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| Author |
Message |
| Joerg... |
 Posted: Wed Nov 04, 2009 7:23 pm |
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Guest
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Gents,
Looking for a small PCB-mounted power supply, 90VAC-260VAC wide range.
15-20W category, 12V. So far I've always rolled my own switchers but
this time it's too small a production volume to go through the agency
cert rigamaroo.
Long story short it's an application for "nasty" environments. Think
farms, rural power grid, thunderstorms, raggedy old emergency power
generators, uncle Leroy's old arc welder, and so on. Plus tons of load
transients from motors being turned on and off right there. As usual,
cost is an issue so mil-spec stuff is out. Has to remain below $20 in
hundreds qties. RoHS will probably be needed some day but not right now.
Which brands/types/series are really reliable these days?
Here is an example:
http://us.tdk-lambda.com/lp/ftp/Specs/kps.pdf
Lambda used to be a top-of-the-line company, AFAICT, although I had some
bad luck of the phssst ... *POOF* kind with their lab bench supplies. We
can't really use this particular type because it's not corner-pinned and
only four pins, will rip right off during the first dirt road ride.
Beats me why they always do that ... <banging head on table>
--
Regards, Joerg
http://www.analogconsultants.com/
"gmail" domain blocked because of excessive spam.
Use another domain or send PM. |
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| Martin Riddle... |
| Posted: Wed Nov 04, 2009 8:25 pm |
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Guest
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"Joerg" <invalid at (no spam) invalid.invalid> wrote in message
news:7lek94F3cslrdU1 at (no spam) mid.individual.net...
[quote]Gents,
Looking for a small PCB-mounted power supply, 90VAC-260VAC wide range.
15-20W category, 12V. So far I've always rolled my own switchers but
this time it's too small a production volume to go through the agency
cert rigamaroo.
Long story short it's an application for "nasty" environments. Think
farms, rural power grid, thunderstorms, raggedy old emergency power
generators, uncle Leroy's old arc welder, and so on. Plus tons of load
transients from motors being turned on and off right there. As usual,
cost is an issue so mil-spec stuff is out. Has to remain below $20 in
hundreds qties. RoHS will probably be needed some day but not right
now.
Which brands/types/series are really reliable these days?
Here is an example:
http://us.tdk-lambda.com/lp/ftp/Specs/kps.pdf
Lambda used to be a top-of-the-line company, AFAICT, although I had
some bad luck of the phssst ... *POOF* kind with their lab bench
supplies. We can't really use this particular type because it's not
corner-pinned and only four pins, will rip right off during the first
dirt road ride. Beats me why they always do that ... <banging head on
table
--
Regards, Joerg
http://www.analogconsultants.com/
[/quote]
Astrodyne, I've never see a failure with their switchers.
Cheers |
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| John Larkin... |
| Posted: Wed Nov 04, 2009 8:34 pm |
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Guest
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On Wed, 04 Nov 2009 16:23:59 -0800, Joerg <invalid at (no spam) invalid.invalid>
wrote:
[quote]Gents,
Looking for a small PCB-mounted power supply, 90VAC-260VAC wide range.
15-20W category, 12V. So far I've always rolled my own switchers but
this time it's too small a production volume to go through the agency
cert rigamaroo.
Long story short it's an application for "nasty" environments. Think
farms, rural power grid, thunderstorms, raggedy old emergency power
generators, uncle Leroy's old arc welder, and so on. Plus tons of load
transients from motors being turned on and off right there. As usual,
cost is an issue so mil-spec stuff is out. Has to remain below $20 in
hundreds qties. RoHS will probably be needed some day but not right now.
Which brands/types/series are really reliable these days?
Here is an example:
http://us.tdk-lambda.com/lp/ftp/Specs/kps.pdf
Lambda used to be a top-of-the-line company, AFAICT, although I had some
bad luck of the phssst ... *POOF* kind with their lab bench supplies. We
can't really use this particular type because it's not corner-pinned and
only four pins, will rip right off during the first dirt road ride.
Beats me why they always do that ... <banging head on table
[/quote]
We've been very happy with MeanWell open-frame switchers. I don't know
if they have PCB-mount stuff. PCB mount supplies take up a lot of
board area and can cause a lot of vibration problems.
We're getting their LPP-150-48 (150 watt PFC switcher with input EMI
filters) for $44.
Can you use an external wart?
John |
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| Joerg... |
| Posted: Wed Nov 04, 2009 8:53 pm |
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Guest
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Martin Riddle wrote:
[quote]"Joerg" <invalid at (no spam) invalid.invalid> wrote in message
news:7lek94F3cslrdU1 at (no spam) mid.individual.net...
Gents,
Looking for a small PCB-mounted power supply, 90VAC-260VAC wide range.
15-20W category, 12V. So far I've always rolled my own switchers but
this time it's too small a production volume to go through the agency
cert rigamaroo.
Long story short it's an application for "nasty" environments. Think
farms, rural power grid, thunderstorms, raggedy old emergency power
generators, uncle Leroy's old arc welder, and so on. Plus tons of load
transients from motors being turned on and off right there. As usual,
cost is an issue so mil-spec stuff is out. Has to remain below $20 in
hundreds qties. RoHS will probably be needed some day but not right
now.
Which brands/types/series are really reliable these days?
Here is an example:
http://us.tdk-lambda.com/lp/ftp/Specs/kps.pdf
Lambda used to be a top-of-the-line company, AFAICT, although I had
some bad luck of the phssst ... *POOF* kind with their lab bench
supplies. We can't really use this particular type because it's not
corner-pinned and only four pins, will rip right off during the first
dirt road ride. Beats me why they always do that ... <banging head on
table
--
Regards, Joerg
http://www.analogconsultants.com/
Astrodyne, I've never see a failure with their switchers.
[/quote]
Thanks, Martin, now I remember that brand. I think they sell directly
and not via distributors. Looks like they only sell versions of open
frames that must be screwed on:
http://www.astrodyne.com/ecatalog/usa/open-frame-power-supply/ASL-1502
40 bucks is a bit steep but I'll give them a ring. The others are
encapsulated but then the price shoots above $70 which I don't think
will fly here:
http://www.astrodyne.com/smartcat/pdf/ANC.pdf
BTW, while scoping out some supplies I realized that the Cincon 15W
supplies and the Lambdas look quite the same. Hmm ...
--
Regards, Joerg
http://www.analogconsultants.com/
"gmail" domain blocked because of excessive spam.
Use another domain or send PM. |
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| Joerg... |
| Posted: Wed Nov 04, 2009 9:05 pm |
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Guest
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John Larkin wrote:
[quote]On Wed, 04 Nov 2009 16:23:59 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
Gents,
Looking for a small PCB-mounted power supply, 90VAC-260VAC wide range.
15-20W category, 12V. So far I've always rolled my own switchers but
this time it's too small a production volume to go through the agency
cert rigamaroo.
Long story short it's an application for "nasty" environments. Think
farms, rural power grid, thunderstorms, raggedy old emergency power
generators, uncle Leroy's old arc welder, and so on. Plus tons of load
transients from motors being turned on and off right there. As usual,
cost is an issue so mil-spec stuff is out. Has to remain below $20 in
hundreds qties. RoHS will probably be needed some day but not right now.
Which brands/types/series are really reliable these days?
Here is an example:
http://us.tdk-lambda.com/lp/ftp/Specs/kps.pdf
Lambda used to be a top-of-the-line company, AFAICT, although I had some
bad luck of the phssst ... *POOF* kind with their lab bench supplies. We
can't really use this particular type because it's not corner-pinned and
only four pins, will rip right off during the first dirt road ride.
Beats me why they always do that ... <banging head on table
We've been very happy with MeanWell open-frame switchers. I don't know
if they have PCB-mount stuff. PCB mount supplies take up a lot of
board area and can cause a lot of vibration problems.
[/quote]
Thanks, John. Mouser has one that looks like it is footprint-compatible
to the Lambda and to the remarkably similar Cincon:
http://www.mouser.com/ProductDetail/Mean-Well/NFM-15-12/?qs=sGAEpiMZZMu0oxGuRuNKHyR6%252bRRfgR3q4687Dpjf4lI%3d
[quote]We're getting their LPP-150-48 (150 watt PFC switcher with input EMI
filters) for $44.
[/quote]
Where do you buy yours from?
[quote]Can you use an external wart?
[/quote]
Nope, has to go onto the board. The problem with bolt-down is the extra
hassle and cost in assembly, plus bolts can come loose. Board space
isn't really lost because the supplies ride one or two tenths above so
you can place stuff underneath as long as it's not fat inductors.
PCB mount would be really nice if they had a few more dummy pins or at
least positioned the pins in the four corners so you get less vibration.
But for reasons that completely elude me they don't.
--
Regards, Joerg
http://www.analogconsultants.com/
"gmail" domain blocked because of excessive spam.
Use another domain or send PM. |
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| John Larkin... |
| Posted: Wed Nov 04, 2009 9:41 pm |
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Guest
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On Wed, 04 Nov 2009 18:05:56 -0800, Joerg <invalid at (no spam) invalid.invalid>
wrote:
[quote]John Larkin wrote:
On Wed, 04 Nov 2009 16:23:59 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
Gents,
Looking for a small PCB-mounted power supply, 90VAC-260VAC wide range.
15-20W category, 12V. So far I've always rolled my own switchers but
this time it's too small a production volume to go through the agency
cert rigamaroo.
Long story short it's an application for "nasty" environments. Think
farms, rural power grid, thunderstorms, raggedy old emergency power
generators, uncle Leroy's old arc welder, and so on. Plus tons of load
transients from motors being turned on and off right there. As usual,
cost is an issue so mil-spec stuff is out. Has to remain below $20 in
hundreds qties. RoHS will probably be needed some day but not right now.
Which brands/types/series are really reliable these days?
Here is an example:
http://us.tdk-lambda.com/lp/ftp/Specs/kps.pdf
Lambda used to be a top-of-the-line company, AFAICT, although I had some
bad luck of the phssst ... *POOF* kind with their lab bench supplies. We
can't really use this particular type because it's not corner-pinned and
only four pins, will rip right off during the first dirt road ride.
Beats me why they always do that ... <banging head on table
We've been very happy with MeanWell open-frame switchers. I don't know
if they have PCB-mount stuff. PCB mount supplies take up a lot of
board area and can cause a lot of vibration problems.
Thanks, John. Mouser has one that looks like it is footprint-compatible
to the Lambda and to the remarkably similar Cincon:
http://www.mouser.com/ProductDetail/Mean-Well/NFM-15-12/?qs=sGAEpiMZZMu0oxGuRuNKHyR6%252bRRfgR3q4687Dpjf4lI%3d
We're getting their LPP-150-48 (150 watt PFC switcher with input EMI
filters) for $44.
Where do you buy yours from?
[/quote]
Powergate LLC. Jameco and Mouser also have them, but are more
expensive.
John |
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| Joerg... |
| Posted: Wed Nov 04, 2009 9:51 pm |
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Guest
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John Larkin wrote:
[quote]On Wed, 04 Nov 2009 18:05:56 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
John Larkin wrote:
On Wed, 04 Nov 2009 16:23:59 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
Gents,
Looking for a small PCB-mounted power supply, 90VAC-260VAC wide range.
15-20W category, 12V. So far I've always rolled my own switchers but
this time it's too small a production volume to go through the agency
cert rigamaroo.
Long story short it's an application for "nasty" environments. Think
farms, rural power grid, thunderstorms, raggedy old emergency power
generators, uncle Leroy's old arc welder, and so on. Plus tons of load
transients from motors being turned on and off right there. As usual,
cost is an issue so mil-spec stuff is out. Has to remain below $20 in
hundreds qties. RoHS will probably be needed some day but not right now.
Which brands/types/series are really reliable these days?
Here is an example:
http://us.tdk-lambda.com/lp/ftp/Specs/kps.pdf
Lambda used to be a top-of-the-line company, AFAICT, although I had some
bad luck of the phssst ... *POOF* kind with their lab bench supplies. We
can't really use this particular type because it's not corner-pinned and
only four pins, will rip right off during the first dirt road ride.
Beats me why they always do that ... <banging head on table
We've been very happy with MeanWell open-frame switchers. I don't know
if they have PCB-mount stuff. PCB mount supplies take up a lot of
board area and can cause a lot of vibration problems.
Thanks, John. Mouser has one that looks like it is footprint-compatible
to the Lambda and to the remarkably similar Cincon:
http://www.mouser.com/ProductDetail/Mean-Well/NFM-15-12/?qs=sGAEpiMZZMu0oxGuRuNKHyR6%252bRRfgR3q4687Dpjf4lI%3d
We're getting their LPP-150-48 (150 watt PFC switcher with input EMI
filters) for $44.
Where do you buy yours from?
Powergate LLC. Jameco and Mouser also have them, but are more
expensive.
[/quote]
Thanks. No prices on their web site but they've got the MeanWell NFM-15
series, so it's just a phone call. The vibration specs do not look good
though. Dang, this thing would be almost ideal. Maybe we can spritz some
goo underneath.
--
Regards, Joerg
http://www.analogconsultants.com/
"gmail" domain blocked because of excessive spam.
Use another domain or send PM. |
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| John Larkin... |
| Posted: Wed Nov 04, 2009 10:04 pm |
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Guest
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On Wed, 04 Nov 2009 18:51:05 -0800, Joerg <invalid at (no spam) invalid.invalid>
wrote:
[quote]John Larkin wrote:
On Wed, 04 Nov 2009 18:05:56 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
John Larkin wrote:
On Wed, 04 Nov 2009 16:23:59 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
Gents,
Looking for a small PCB-mounted power supply, 90VAC-260VAC wide range.
15-20W category, 12V. So far I've always rolled my own switchers but
this time it's too small a production volume to go through the agency
cert rigamaroo.
Long story short it's an application for "nasty" environments. Think
farms, rural power grid, thunderstorms, raggedy old emergency power
generators, uncle Leroy's old arc welder, and so on. Plus tons of load
transients from motors being turned on and off right there. As usual,
cost is an issue so mil-spec stuff is out. Has to remain below $20 in
hundreds qties. RoHS will probably be needed some day but not right now.
Which brands/types/series are really reliable these days?
Here is an example:
http://us.tdk-lambda.com/lp/ftp/Specs/kps.pdf
Lambda used to be a top-of-the-line company, AFAICT, although I had some
bad luck of the phssst ... *POOF* kind with their lab bench supplies. We
can't really use this particular type because it's not corner-pinned and
only four pins, will rip right off during the first dirt road ride.
Beats me why they always do that ... <banging head on table
We've been very happy with MeanWell open-frame switchers. I don't know
if they have PCB-mount stuff. PCB mount supplies take up a lot of
board area and can cause a lot of vibration problems.
Thanks, John. Mouser has one that looks like it is footprint-compatible
to the Lambda and to the remarkably similar Cincon:
http://www.mouser.com/ProductDetail/Mean-Well/NFM-15-12/?qs=sGAEpiMZZMu0oxGuRuNKHyR6%252bRRfgR3q4687Dpjf4lI%3d
We're getting their LPP-150-48 (150 watt PFC switcher with input EMI
filters) for $44.
Where do you buy yours from?
Powergate LLC. Jameco and Mouser also have them, but are more
expensive.
Thanks. No prices on their web site but they've got the MeanWell NFM-15
series, so it's just a phone call. The vibration specs do not look good
though. Dang, this thing would be almost ideal. Maybe we can spritz some
goo underneath.
[/quote]
RTV the wiggly parts.
John |
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| Joerg... |
| Posted: Wed Nov 04, 2009 10:25 pm |
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Guest
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John Larkin wrote:
[quote]On Wed, 04 Nov 2009 18:51:05 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
John Larkin wrote:
On Wed, 04 Nov 2009 18:05:56 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
John Larkin wrote:
On Wed, 04 Nov 2009 16:23:59 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
Gents,
Looking for a small PCB-mounted power supply, 90VAC-260VAC wide range.
15-20W category, 12V. So far I've always rolled my own switchers but
this time it's too small a production volume to go through the agency
cert rigamaroo.
Long story short it's an application for "nasty" environments. Think
farms, rural power grid, thunderstorms, raggedy old emergency power
generators, uncle Leroy's old arc welder, and so on. Plus tons of load
transients from motors being turned on and off right there. As usual,
cost is an issue so mil-spec stuff is out. Has to remain below $20 in
hundreds qties. RoHS will probably be needed some day but not right now.
Which brands/types/series are really reliable these days?
Here is an example:
http://us.tdk-lambda.com/lp/ftp/Specs/kps.pdf
Lambda used to be a top-of-the-line company, AFAICT, although I had some
bad luck of the phssst ... *POOF* kind with their lab bench supplies. We
can't really use this particular type because it's not corner-pinned and
only four pins, will rip right off during the first dirt road ride.
Beats me why they always do that ... <banging head on table
We've been very happy with MeanWell open-frame switchers. I don't know
if they have PCB-mount stuff. PCB mount supplies take up a lot of
board area and can cause a lot of vibration problems.
Thanks, John. Mouser has one that looks like it is footprint-compatible
to the Lambda and to the remarkably similar Cincon:
http://www.mouser.com/ProductDetail/Mean-Well/NFM-15-12/?qs=sGAEpiMZZMu0oxGuRuNKHyR6%252bRRfgR3q4687Dpjf4lI%3d
We're getting their LPP-150-48 (150 watt PFC switcher with input EMI
filters) for $44.
Where do you buy yours from?
Powergate LLC. Jameco and Mouser also have them, but are more
expensive.
Thanks. No prices on their web site but they've got the MeanWell NFM-15
series, so it's just a phone call. The vibration specs do not look good
though. Dang, this thing would be almost ideal. Maybe we can spritz some
goo underneath.
RTV the wiggly parts.
[/quote]
Well, the whole thing will be the wiggly part because it rides on four
puny pins ;-)
Possibly squishing silicone under the four corners works.
--
Regards, Joerg
http://www.analogconsultants.com/
"gmail" domain blocked because of excessive spam.
Use another domain or send PM. |
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| langwadt at (no spam) fonz.dk... |
| Posted: Thu Nov 05, 2009 7:10 am |
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Guest
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On 5 Nov., 01:23, Joerg <inva... at (no spam) invalid.invalid> wrote:
[quote]Gents,
Looking for a small PCB-mounted power supply, 90VAC-260VAC wide range.
15-20W category, 12V. So far I've always rolled my own switchers but
this time it's too small a production volume to go through the agency
cert rigamaroo.
Long story short it's an application for "nasty" environments. Think
farms, rural power grid, thunderstorms, raggedy old emergency power
generators, uncle Leroy's old arc welder, and so on. Plus tons of load
transients from motors being turned on and off right there. As usual,
cost is an issue so mil-spec stuff is out. Has to remain below $20 in
hundreds qties. RoHS will probably be needed some day but not right now.
Which brands/types/series are really reliable these days?
Here is an example:http://us.tdk-lambda.com/lp/ftp/Specs/kps.pdf
Lambda used to be a top-of-the-line company, AFAICT, although I had some
bad luck of the phssst ... *POOF* kind with their lab bench supplies. We
can't really use this particular type because it's not corner-pinned and
only four pins, will rip right off during the first dirt road ride.
Beats me why they always do that ... <banging head on table
--
[/quote]
RS has traco power TMP 15112 (12V,15W) for ~30€ in ones
pins are not quite in the corners for 15W, 30 watt is
it has threaded holes for two screws in the bottom
-Lasse |
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| Herman... |
| Posted: Thu Nov 05, 2009 7:21 am |
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Guest
|
"Joerg" <invalid at (no spam) invalid.invalid> wrote in message
news:7leusoFmufisU1 at (no spam) mid.individual.net...
[quote]John Larkin wrote:
On Wed, 04 Nov 2009 18:51:05 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
John Larkin wrote:
On Wed, 04 Nov 2009 18:05:56 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
John Larkin wrote:
On Wed, 04 Nov 2009 16:23:59 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
Gents,
Looking for a small PCB-mounted power supply, 90VAC-260VAC wide
range. 15-20W category, 12V. So far I've always rolled my own
switchers but this time it's too small a production volume to go
through the agency cert rigamaroo.
Long story short it's an application for "nasty" environments. Think
farms, rural power grid, thunderstorms, raggedy old emergency power
generators, uncle Leroy's old arc welder, and so on. Plus tons of
load transients from motors being turned on and off right there. As
usual, cost is an issue so mil-spec stuff is out. Has to remain
below $20 in hundreds qties. RoHS will probably be needed some day
but not right now.
Which brands/types/series are really reliable these days?
Here is an example:
http://us.tdk-lambda.com/lp/ftp/Specs/kps.pdf
Lambda used to be a top-of-the-line company, AFAICT, although I had
some bad luck of the phssst ... *POOF* kind with their lab bench
supplies. We can't really use this particular type because it's not
corner-pinned and only four pins, will rip right off during the
first dirt road ride. Beats me why they always do that ... <banging
head on table
We've been very happy with MeanWell open-frame switchers. I don't
know
if they have PCB-mount stuff. PCB mount supplies take up a lot of
board area and can cause a lot of vibration problems.
Thanks, John. Mouser has one that looks like it is
footprint-compatible to the Lambda and to the remarkably similar
Cincon:
http://www.mouser.com/ProductDetail/Mean-Well/NFM-15-12/?qs=sGAEpiMZZMu0oxGuRuNKHyR6%252bRRfgR3q4687Dpjf4lI%3d
We're getting their LPP-150-48 (150 watt PFC switcher with input EMI
filters) for $44.
Where do you buy yours from?
Powergate LLC. Jameco and Mouser also have them, but are more
expensive.
Thanks. No prices on their web site but they've got the MeanWell NFM-15
series, so it's just a phone call. The vibration specs do not look good
though. Dang, this thing would be almost ideal. Maybe we can spritz some
goo underneath.
RTV the wiggly parts.
Well, the whole thing will be the wiggly part because it rides on four
puny pins ;-)
Possibly squishing silicone under the four corners works.
--
Regards, Joerg
http://www.analogconsultants.com/
"gmail" domain blocked because of excessive spam.
Use another domain or send PM.
[/quote]
I had a problem with PC mounted transformers and them tearing loose. When
the device was dropped, the transformer would break loose and become a
bowling ball inside the enclosure. I tried tie-wrapping the transformer
down to the board but they still broke loose. I started using "Gorilla
Glue", the kind that activates with water and foams up. 362 units later and
not a single failure. |
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| Joerg... |
| Posted: Thu Nov 05, 2009 10:55 am |
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Guest
|
Herman wrote:
[quote]"Joerg" <invalid at (no spam) invalid.invalid> wrote in message
news:7leusoFmufisU1 at (no spam) mid.individual.net...
John Larkin wrote:
On Wed, 04 Nov 2009 18:51:05 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
John Larkin wrote:
On Wed, 04 Nov 2009 18:05:56 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
John Larkin wrote:
On Wed, 04 Nov 2009 16:23:59 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
Gents,
Looking for a small PCB-mounted power supply, 90VAC-260VAC wide
range. 15-20W category, 12V. So far I've always rolled my own
switchers but this time it's too small a production volume to go
through the agency cert rigamaroo.
Long story short it's an application for "nasty" environments. Think
farms, rural power grid, thunderstorms, raggedy old emergency power
generators, uncle Leroy's old arc welder, and so on. Plus tons of
load transients from motors being turned on and off right there. As
usual, cost is an issue so mil-spec stuff is out. Has to remain
below $20 in hundreds qties. RoHS will probably be needed some day
but not right now.
Which brands/types/series are really reliable these days?
Here is an example:
http://us.tdk-lambda.com/lp/ftp/Specs/kps.pdf
Lambda used to be a top-of-the-line company, AFAICT, although I had
some bad luck of the phssst ... *POOF* kind with their lab bench
supplies. We can't really use this particular type because it's not
corner-pinned and only four pins, will rip right off during the
first dirt road ride. Beats me why they always do that ... <banging
head on table
We've been very happy with MeanWell open-frame switchers. I don't
know
if they have PCB-mount stuff. PCB mount supplies take up a lot of
board area and can cause a lot of vibration problems.
Thanks, John. Mouser has one that looks like it is
footprint-compatible to the Lambda and to the remarkably similar
Cincon:
http://www.mouser.com/ProductDetail/Mean-Well/NFM-15-12/?qs=sGAEpiMZZMu0oxGuRuNKHyR6%252bRRfgR3q4687Dpjf4lI%3d
We're getting their LPP-150-48 (150 watt PFC switcher with input EMI
filters) for $44.
Where do you buy yours from?
Powergate LLC. Jameco and Mouser also have them, but are more
expensive.
Thanks. No prices on their web site but they've got the MeanWell NFM-15
series, so it's just a phone call. The vibration specs do not look good
though. Dang, this thing would be almost ideal. Maybe we can spritz some
goo underneath.
RTV the wiggly parts.
Well, the whole thing will be the wiggly part because it rides on four
puny pins ;-)
Possibly squishing silicone under the four corners works.
--
Regards, Joerg
http://www.analogconsultants.com/
"gmail" domain blocked because of excessive spam.
Use another domain or send PM.
I had a problem with PC mounted transformers and them tearing loose. When
the device was dropped, the transformer would break loose and become a
bowling ball inside the enclosure. I tried tie-wrapping the transformer
down to the board but they still broke loose. I started using "Gorilla
Glue", the kind that activates with water and foams up. 362 units later and
not a single failure.
[/quote]
Ah, thanks, here comes the hardcore practical stuff :-)
Is it this one?
http://www.gorillaglue.com/glues/gorillaglue/index.aspx
They also have an epoxy. What I'd need is something that retains a wee
bit of flexibility because upon hard shocks the boards with, well, flex
a bit versus each other.
--
Regards, Joerg
http://www.analogconsultants.com/
"gmail" domain blocked because of excessive spam.
Use another domain or send PM. |
|
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| Back to top |
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| Spehro Pefhany... |
| Posted: Thu Nov 05, 2009 11:11 am |
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Guest
|
On Thu, 5 Nov 2009 06:21:55 -0600, "Herman" <ripe at (no spam) bellsouth.net>
wrote:
[quote]
"Joerg" <invalid at (no spam) invalid.invalid> wrote in message
news:7leusoFmufisU1 at (no spam) mid.individual.net...
John Larkin wrote:
On Wed, 04 Nov 2009 18:51:05 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
John Larkin wrote:
On Wed, 04 Nov 2009 18:05:56 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
John Larkin wrote:
On Wed, 04 Nov 2009 16:23:59 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
Gents,
Looking for a small PCB-mounted power supply, 90VAC-260VAC wide
range. 15-20W category, 12V. So far I've always rolled my own
switchers but this time it's too small a production volume to go
through the agency cert rigamaroo.
Long story short it's an application for "nasty" environments. Think
farms, rural power grid, thunderstorms, raggedy old emergency power
generators, uncle Leroy's old arc welder, and so on. Plus tons of
load transients from motors being turned on and off right there. As
usual, cost is an issue so mil-spec stuff is out. Has to remain
below $20 in hundreds qties. RoHS will probably be needed some day
but not right now.
Which brands/types/series are really reliable these days?
Here is an example:
http://us.tdk-lambda.com/lp/ftp/Specs/kps.pdf
Lambda used to be a top-of-the-line company, AFAICT, although I had
some bad luck of the phssst ... *POOF* kind with their lab bench
supplies. We can't really use this particular type because it's not
corner-pinned and only four pins, will rip right off during the
first dirt road ride. Beats me why they always do that ... <banging
head on table
We've been very happy with MeanWell open-frame switchers. I don't
know
if they have PCB-mount stuff. PCB mount supplies take up a lot of
board area and can cause a lot of vibration problems.
Thanks, John. Mouser has one that looks like it is
footprint-compatible to the Lambda and to the remarkably similar
Cincon:
http://www.mouser.com/ProductDetail/Mean-Well/NFM-15-12/?qs=sGAEpiMZZMu0oxGuRuNKHyR6%252bRRfgR3q4687Dpjf4lI%3d
We're getting their LPP-150-48 (150 watt PFC switcher with input EMI
filters) for $44.
Where do you buy yours from?
Powergate LLC. Jameco and Mouser also have them, but are more
expensive.
Thanks. No prices on their web site but they've got the MeanWell NFM-15
series, so it's just a phone call. The vibration specs do not look good
though. Dang, this thing would be almost ideal. Maybe we can spritz some
goo underneath.
RTV the wiggly parts.
Well, the whole thing will be the wiggly part because it rides on four
puny pins ;-)
Possibly squishing silicone under the four corners works.
--
Regards, Joerg
http://www.analogconsultants.com/
"gmail" domain blocked because of excessive spam.
Use another domain or send PM.
I had a problem with PC mounted transformers and them tearing loose. When
the device was dropped, the transformer would break loose and become a
bowling ball inside the enclosure. I tried tie-wrapping the transformer
down to the board but they still broke loose. I started using "Gorilla
Glue", the kind that activates with water and foams up. 362 units later and
not a single failure.
[/quote]
Sounds good. Is there an adequate UL flammability rating on that
stuff? |
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| Back to top |
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| John Larkin... |
| Posted: Thu Nov 05, 2009 11:48 am |
|
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Guest
|
On Thu, 05 Nov 2009 07:55:44 -0800, Joerg <invalid at (no spam) invalid.invalid>
wrote:
[quote]Herman wrote:
"Joerg" <invalid at (no spam) invalid.invalid> wrote in message
news:7leusoFmufisU1 at (no spam) mid.individual.net...
John Larkin wrote:
On Wed, 04 Nov 2009 18:51:05 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
John Larkin wrote:
On Wed, 04 Nov 2009 18:05:56 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
John Larkin wrote:
On Wed, 04 Nov 2009 16:23:59 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
Gents,
Looking for a small PCB-mounted power supply, 90VAC-260VAC wide
range. 15-20W category, 12V. So far I've always rolled my own
switchers but this time it's too small a production volume to go
through the agency cert rigamaroo.
Long story short it's an application for "nasty" environments. Think
farms, rural power grid, thunderstorms, raggedy old emergency power
generators, uncle Leroy's old arc welder, and so on. Plus tons of
load transients from motors being turned on and off right there. As
usual, cost is an issue so mil-spec stuff is out. Has to remain
below $20 in hundreds qties. RoHS will probably be needed some day
but not right now.
Which brands/types/series are really reliable these days?
Here is an example:
http://us.tdk-lambda.com/lp/ftp/Specs/kps.pdf
Lambda used to be a top-of-the-line company, AFAICT, although I had
some bad luck of the phssst ... *POOF* kind with their lab bench
supplies. We can't really use this particular type because it's not
corner-pinned and only four pins, will rip right off during the
first dirt road ride. Beats me why they always do that ... <banging
head on table
We've been very happy with MeanWell open-frame switchers. I don't
know
if they have PCB-mount stuff. PCB mount supplies take up a lot of
board area and can cause a lot of vibration problems.
Thanks, John. Mouser has one that looks like it is
footprint-compatible to the Lambda and to the remarkably similar
Cincon:
http://www.mouser.com/ProductDetail/Mean-Well/NFM-15-12/?qs=sGAEpiMZZMu0oxGuRuNKHyR6%252bRRfgR3q4687Dpjf4lI%3d
We're getting their LPP-150-48 (150 watt PFC switcher with input EMI
filters) for $44.
Where do you buy yours from?
Powergate LLC. Jameco and Mouser also have them, but are more
expensive.
Thanks. No prices on their web site but they've got the MeanWell NFM-15
series, so it's just a phone call. The vibration specs do not look good
though. Dang, this thing would be almost ideal. Maybe we can spritz some
goo underneath.
RTV the wiggly parts.
Well, the whole thing will be the wiggly part because it rides on four
puny pins ;-)
Possibly squishing silicone under the four corners works.
--
Regards, Joerg
http://www.analogconsultants.com/
"gmail" domain blocked because of excessive spam.
Use another domain or send PM.
I had a problem with PC mounted transformers and them tearing loose. When
the device was dropped, the transformer would break loose and become a
bowling ball inside the enclosure. I tried tie-wrapping the transformer
down to the board but they still broke loose. I started using "Gorilla
Glue", the kind that activates with water and foams up. 362 units later and
not a single failure.
Ah, thanks, here comes the hardcore practical stuff :-)
Is it this one?
http://www.gorillaglue.com/glues/gorillaglue/index.aspx
They also have an epoxy. What I'd need is something that retains a wee
bit of flexibility because upon hard shocks the boards with, well, flex
a bit versus each other.
[/quote]
Serious double-stick foam tape might be good.
John |
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| Back to top |
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| Joerg... |
| Posted: Thu Nov 05, 2009 11:58 am |
|
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|
Guest
|
John Larkin wrote:
[quote]On Thu, 05 Nov 2009 07:55:44 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
Herman wrote:
"Joerg" <invalid at (no spam) invalid.invalid> wrote in message
news:7leusoFmufisU1 at (no spam) mid.individual.net...
John Larkin wrote:
On Wed, 04 Nov 2009 18:51:05 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
John Larkin wrote:
On Wed, 04 Nov 2009 18:05:56 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
John Larkin wrote:
On Wed, 04 Nov 2009 16:23:59 -0800, Joerg <invalid at (no spam) invalid.invalid
wrote:
Gents,
Looking for a small PCB-mounted power supply, 90VAC-260VAC wide
range. 15-20W category, 12V. So far I've always rolled my own
switchers but this time it's too small a production volume to go
through the agency cert rigamaroo.
Long story short it's an application for "nasty" environments. Think
farms, rural power grid, thunderstorms, raggedy old emergency power
generators, uncle Leroy's old arc welder, and so on. Plus tons of
load transients from motors being turned on and off right there. As
usual, cost is an issue so mil-spec stuff is out. Has to remain
below $20 in hundreds qties. RoHS will probably be needed some day
but not right now.
Which brands/types/series are really reliable these days?
Here is an example:
http://us.tdk-lambda.com/lp/ftp/Specs/kps.pdf
Lambda used to be a top-of-the-line company, AFAICT, although I had
some bad luck of the phssst ... *POOF* kind with their lab bench
supplies. We can't really use this particular type because it's not
corner-pinned and only four pins, will rip right off during the
first dirt road ride. Beats me why they always do that ... <banging
head on table
We've been very happy with MeanWell open-frame switchers. I don't
know
if they have PCB-mount stuff. PCB mount supplies take up a lot of
board area and can cause a lot of vibration problems.
Thanks, John. Mouser has one that looks like it is
footprint-compatible to the Lambda and to the remarkably similar
Cincon:
http://www.mouser.com/ProductDetail/Mean-Well/NFM-15-12/?qs=sGAEpiMZZMu0oxGuRuNKHyR6%252bRRfgR3q4687Dpjf4lI%3d
We're getting their LPP-150-48 (150 watt PFC switcher with input EMI
filters) for $44.
Where do you buy yours from?
Powergate LLC. Jameco and Mouser also have them, but are more
expensive.
Thanks. No prices on their web site but they've got the MeanWell NFM-15
series, so it's just a phone call. The vibration specs do not look good
though. Dang, this thing would be almost ideal. Maybe we can spritz some
goo underneath.
RTV the wiggly parts.
Well, the whole thing will be the wiggly part because it rides on four
puny pins ;-)
Possibly squishing silicone under the four corners works.
--
Regards, Joerg
http://www.analogconsultants.com/
"gmail" domain blocked because of excessive spam.
Use another domain or send PM.
I had a problem with PC mounted transformers and them tearing loose. When
the device was dropped, the transformer would break loose and become a
bowling ball inside the enclosure. I tried tie-wrapping the transformer
down to the board but they still broke loose. I started using "Gorilla
Glue", the kind that activates with water and foams up. 362 units later and
not a single failure.
Ah, thanks, here comes the hardcore practical stuff :-)
Is it this one?
http://www.gorillaglue.com/glues/gorillaglue/index.aspx
They also have an epoxy. What I'd need is something that retains a wee
bit of flexibility because upon hard shocks the boards with, well, flex
a bit versus each other.
Serious double-stick foam tape might be good.
[/quote]
Yeah, like the kind that rock bands use to stick their cables onto
concrete :-)
However, these supplies have stepped pins and there seems to be a large
gap between SMPS board and circuit board. Around 2/10" or so. So it
would have to be pretty thick foam tape. Plus it can't have as much
compliance as, for example, weather stripping because then it wouldn't
protect much against ripping the SMPS off during a fall.
It would have been so easy if they had just added half a dozen dummy
pins for extra mechanical support. The alternative would be to reduce
the gap substantially but that requires rework, prying the pins from the
SMPS, replacing with shorter-stepped ones and thus voiding the warranty.
--
Regards, Joerg
http://www.analogconsultants.com/
"gmail" domain blocked because of excessive spam.
Use another domain or send PM. |
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