Looking for a small off the shelf PSU

[Eeyore]

I've got a little project that I'd like an AC power supply for.

I'd like to avoid a wall wart or lump-in-a-cord and I don't really want to get
into designing my own for small quantities and have to deal with compliance
issues into the bargain.

So, Im looking for a simple self-contained supply ( ideally enclosed ) and
ideally universal input.

I only need a few watts. 3.6V @ 350mA and +/- 9 , 12 or 15V @ say 150mA (
non-critical ).

Has anyone got any suggestions ? It's not something I normally need to look at.

Graham

 

[Roger Hamlett]

I've got a little project that I'd like an AC power supply for.

I'd like to avoid a wall wart or lump-in-a-cord and I don't really want
to get
into designing my own for small quantities and have to deal with
compliance
issues into the bargain.

So, Im looking for a simple self-contained supply ( ideally enclosed )
and
ideally universal input.

I only need a few watts. 3.6V @ 350mA and +/- 9 , 12 or 15V @ say 150mA
(
non-critical ).

Has anyone got any suggestions ? It's not something I normally need to
look at.

You will find that these are more expensive than Wall Warts. Generally,
'triple supply' units are also noticeably more, and you might want to
consider, using a small charge pump chip to develop the +/-15v supplies,
if these are not too critical, and just using a single supply unit. The
very smallest PCB units are often not enclosed. Traco enclosed units,
start at 18W. However there are then really small 'fully encapsulated'
units, and for example, Traco, do such a module, the TML15515, which
though 15W, otherwise 'meets' your requirements.
As a non encapsulated PCB mount module, the TOF15-0533T, would again suit,
and an optional 'cover', is available for this.
Several other companies do similar modules.
These are 'universal input' modules (85 to 265vAC), with safety
certifications for just about every standard.
If your 'run', is more than a few units, it is worth talking to one of the
companies, or a supplier. As an example, in the past, IPD, did me a custom
unit, for only a couple of dollars more than the standard modules, with
assymetric output rails.

Best Wishes

 

[Eeyore]

You will find that these are more expensive than Wall Warts.

For sure but that's not the primary motivator here. 'Professional' kit doesn't
cut it when wall-wart powered.

Generally,
'triple supply' units are also noticeably more, and you might want to
consider, using a small charge pump chip to develop the +/-15v supplies,
if these are not too critical, and just using a single supply unit.

I'd considered that too. It's a maybe.

The
very smallest PCB units are often not enclosed. Traco enclosed units,
start at 18W. However there are then really small 'fully encapsulated'
units, and for example, Traco, do such a module, the TML15515, which
though 15W, otherwise 'meets' your requirements.
As a non encapsulated PCB mount module, the TOF15-0533T, would again suit,
and an optional 'cover', is available for this.
Several other companies do similar modules.
These are 'universal input' modules (85 to 265vAC), with safety
certifications for just about every standard.
If your 'run', is more than a few units, it is worth talking to one of the
companies, or a supplier. As an example, in the past, IPD, did me a custom
unit, for only a couple of dollars more than the standard modules, with
assymetric output rails.

How many units did you need for that to make sense ?

Graham

 

[Homer J Simpson]

I've got a little project that I'd like an AC power supply for.

I'd like to avoid a wall wart or lump-in-a-cord and I don't really want to
get
into designing my own for small quantities and have to deal with
compliance
issues into the bargain.

AllElectronics.com

 

[Hal Murray]

For sure but that's not the primary motivator here. 'Professional' kit doesn't
cut it when wall-wart powered.

Why? I've seen a lot of laptops powered off wall warts. Are they
not professional?

If you are worried about the plug falling out, use a right-angle
one and put a clip/clamp over it.

If your gear is expected to be used on the desk top or bench, it
might even be an advantage to have a light flexible power cord
rather than a big/stiff one. The space/weight savings might help too.

 

[Zak]

I've got a little project that I'd like an AC power supply for.

I'd like to avoid a wall wart or lump-in-a-cord and I don't really want to get
into designing my own for small quantities and have to deal with compliance
issues into the bargain.

So, Im looking for a simple self-contained supply ( ideally enclosed ) and
ideally universal input.

I only need a few watts. 3.6V @ 350mA and +/- 9 , 12 or 15V @ say 150mA (
non-critical ).

A latop-style supply often takes a power cord. Mount such a box inside
your cabinet and be done.

I've seen them as dual supply models at least for USB drive cabinets. 5
volts, not 3.6 volts, though.


Thomas

 

[Brian]

I've got a little project that I'd like an AC power supply for.

I'd like to avoid a wall wart or lump-in-a-cord and I don't really want to get
into designing my own for small quantities and have to deal with compliance
issues into the bargain.

So, Im looking for a simple self-contained supply ( ideally enclosed ) and
ideally universal input.

I only need a few watts. 3.6V @ 350mA and +/- 9 , 12 or 15V @ say 150mA (
non-critical ).

Has anyone got any suggestions ? It's not something I normally need to look at.

Graham

Graham, I'll give you the same fag answer you'd give anyone else...
"Does it need to fit up your arse?"

Now, maybe you will understand why most of your posts seem to show that
you have a fascination for homosexual behaviour.

 

[Eeyore]

Why? I've seen a lot of laptops powered off wall warts. Are they
not professional?

Not in my book. I've seen those DC connectors fail too. WTH does a $1000 laptop
rely on a 2c connector to get its power ?

Pro-audio ( the market the product is for ) requires very durable equipment that
doesn't rely on friction fitting connectors that easily break for starters.

Besides, the wart is a PITA to have to carry around with you when it's being used
in the field.

If you are worried about the plug falling out, use a right-angle
one and put a clip/clamp over it.

Not adequate. Warts are simply plain Mr Clumsy territory. Experience shows them to
be unreliable too, noisy, prone to inadvertent damage, you name it.

If your gear is expected to be used on the desk top or bench, it
might even be an advantage to have a light flexible power cord
rather than a big/stiff one. The space/weight savings might help too.

Weight is almost a non-issue compared to durability.

The other side of the coin is that 'flimsy' DC leads such as found with most wart
powered PC peripherals is wholly inadequate to the task.

Graham

 

[Eeyore]

A latop-style supply often takes a power cord. Mount such a box inside
your cabinet and be done.

Not exactly what I had in mind for a production item.

I've seen them as dual supply models at least for USB drive cabinets. 5
volts, not 3.6 volts, though.

5 and 12 Volts ? The 3.6V is easily obtained with a regulator.

Graham

 

[Eeyore]

AllElectronics.com

Damn !

If only there was one of these in the UK !

Nice one Homer.

Graham