# Help ID Wallwart Switcher or Linear

A

#### amdx

Jan 1, 1970
0
Hi guys,
I want to know if this is a switching supply or a linear regulator.

http://www.monstermarketplace.com/Electronics/Landing2900a2344.html

http://www.amazon.com/PHC-2200W-PHC-2200W/dp/B000VA359W

This involves running a pump, a thermostatic controlled circuit switches
on the PHC-2200w and that drives the pump.
Have had a problem with the thermostatic controlled circuit and
manufacturer
says,
" If you want to run a DC pump via a power supply that "our circuit" powers,
then it should not be a switching power supply."

So trying to figure out if this is the cause of the
failed thermostatic controlled circuit.

Mike

E

#### ehsjr

Jan 1, 1970
0
amdx said:
Hi guys,
I want to know if this is a switching supply or a linear regulator.

http://www.monstermarketplace.com/Electronics/Landing2900a2344.html

http://www.amazon.com/PHC-2200W-PHC-2200W/dp/B000VA359W

This involves running a pump, a thermostatic controlled circuit switches
on the PHC-2200w and that drives the pump.
Have had a problem with the thermostatic controlled circuit and
manufacturer
says,
" If you want to run a DC pump via a power supply that "our circuit" powers,
then it should not be a switching power supply."

So trying to figure out if this is the cause of the
failed thermostatic controlled circuit.

Mike

It's a switcher:

As a guess, your problem may stem from the fact (?) that you appear
to be switching the supply AC input instead of switching an already
stable DC output from the supply.

Can you do the following?

------- /
AC---|PHC2200|---o o-------+
| | Tstat |
| | Switch [Pump]
| | |
AC---| |--------------+
-------

/ -------
AC---o o---|PHC2200|------+
Tstat | | |
Switch | | [Pump]
| | |
AC----------| |------+
-------

Also, this idea could help if you must switch the AC side:

/
+---o o-----------------+
| |
+12 ---+------+--[Rly]--+------+ |
| | | | |
[3.3K] +---|<----+ | +-----+
| /c | |
+---[330]--[Zd]---+---| NPN [Pump] [D2]
| 6V | \e | |a
[330uF] [10K] | +-----+
| | | |
- ---+-----------------+-----+-------+

The idea is to allow the power supply about a second to
stabilize before the load is connected. The circuit is
general, I'm assuming 12 volts, 2 amps and guessing at
worth a try if switching the AC input instead of the DC
output.

Ed

A

#### amdx

Jan 1, 1970
0
ehsjr said:
amdx said:
Hi guys,
I want to know if this is a switching supply or a linear regulator.

http://www.monstermarketplace.com/Electronics/Landing2900a2344.html

http://www.amazon.com/PHC-2200W-PHC-2200W/dp/B000VA359W

This involves running a pump, a thermostatic controlled circuit switches
on the PHC-2200w and that drives the pump.
Have had a problem with the thermostatic controlled circuit and
manufacturer
says,
" If you want to run a DC pump via a power supply that "our circuit"
powers,
then it should not be a switching power supply."

So trying to figure out if this is the cause of the
failed thermostatic controlled circuit.

Mike

It's a switcher:

As a guess, your problem may stem from the fact (?) that you appear
to be switching the supply AC input instead of switching an already
stable DC output from the supply.

Can you do the following?

------- /
AC---|PHC2200|---o o-------+
| | Tstat |
| | Switch [Pump]
| | |
AC---| |--------------+
-------

/ -------
AC---o o---|PHC2200|------+
Tstat | | |
Switch | | [Pump]
| | |
AC----------| |------+
-------

Also, this idea could help if you must switch the AC side:

/
+---o o-----------------+
| |
+12 ---+------+--[Rly]--+------+ |
| | | | |
[3.3K] +---|<----+ | +-----+
| /c | |
+---[330]--[Zd]---+---| NPN [Pump] [D2]
| 6V | \e | |a
[330uF] [10K] | +-----+
| | | |
- ---+-----------------+-----+-------+

The idea is to allow the power supply about a second to
stabilize before the load is connected. The circuit is
general, I'm assuming 12 volts, 2 amps and guessing at
worth a try if switching the AC input instead of the DC
output.

Ed

Hi Ed,
Thanks for the input, I saw the "auto switching " term on another site, but
it
didn't give my the feel of solid information. On this site you found it does
say
"state of the art switching technology"
I think that is solid enough!
I'm helping someone else try to get to an understanding of what he has.
I'll try to send them here to see your ascii art.
Thanks for the help, Mike

A

#### Archimedes' Lever

Jan 1, 1970
0
Hi guys,
I want to know if this is a switching supply or a linear regulator.

http://www.monstermarketplace.com/Electronics/Landing2900a2344.html

http://www.amazon.com/PHC-2200W-PHC-2200W/dp/B000VA359W

This involves running a pump, a thermostatic controlled circuit switches
on the PHC-2200w and that drives the pump.
Have had a problem with the thermostatic controlled circuit and
manufacturer
says,
" If you want to run a DC pump via a power supply that "our circuit" powers,
then it should not be a switching power supply."

So trying to figure out if this is the cause of the
failed thermostatic controlled circuit.

Mike

It is very likely a linear, but I will not declare it as such from a
mere photo and common sense.

A

#### amdx

Jan 1, 1970
0
Archimedes' Lever said:
It is very likely a linear, but I will not declare it as such from a
mere photo and common sense.

Lessee, 1-Switching 1-Linear, ok next vote must be right!
Mike

A

#### Archimedes' Lever

Jan 1, 1970
0
Lessee, 1-Switching 1-Linear, ok next vote must be right!
Mike

A box like that usually has a transformer in there. Is it heavy, like
there might be some laminated mµ metal plates in there? ie transformer.

If so, I do not know of many transformer fed switchers, but anything is
possible.

A

#### amdx

Jan 1, 1970
0
Archimedes' Lever said:
A box like that usually has a transformer in there. Is it heavy, like
there might be some laminated mµ metal plates in there? ie transformer.

If so, I do not know of many transformer fed switchers, but anything is
possible.

Ya, it's a lack of solid info, it looks like the standard wallwart with a
stepdown transformer, but description says "state of the art switching
technology".
The price seems more consistant with a stepdown transformer style.
Wouldn't be hard to figure if I had it in my hands.
Mike

L

#### legg

Jan 1, 1970
0

The first line on the product's retail display card is:

Input voltage range is 100-240VAC.

portable rechargeable battery-powered consumer device, for which this
adapter is marketed. This is because batteries are expected to be
present in the circuit to handle operating transients. Largish output
filter caps might help it power more dynamic loads unassisted.

Switching the output (after any extra filter caps), rather than the
input, might be safer.

As I recall, a household type thermostatic controller normally expects
to switch 24VAC control lines, not AC mains directly. You might read
the info that came with it - this type of info will be printed pretty
clearly on the instructions.

RL

A

#### amdx

Jan 1, 1970
0
legg said:
The first line on the product's retail display card is:

Input voltage range is 100-240VAC.

portable rechargeable battery-powered consumer device, for which this
adapter is marketed. This is because batteries are expected to be
present in the circuit to handle operating transients. Largish output
filter caps might help it power more dynamic loads unassisted.

Switching the output (after any extra filter caps), rather than the
input, might be safer.

As I recall, a household type thermostatic controller normally expects
to switch 24VAC control lines, not AC mains directly. You might read
the info that came with it - this type of info will be printed pretty
clearly on the instructions.

RL

This system is designed to run a pump for a solar water heating system.
I think it is made to switch a 120vac to run a pump. In this case the
fellow
is running a 12vdc pump.
Mike

R

#### Rich Grise

Jan 1, 1970
0
Lessee, 1-Switching 1-Linear, ok next vote must be right!

If it's in a blister pack that can hang on a display hook, it must be
a switcher.

Cheers!
Rich

A

#### amdx

Jan 1, 1970
0
legg said:
The first line on the product's retail display card is:

Input voltage range is 100-240VAC.

portable rechargeable battery-powered consumer device, for which this
adapter is marketed. This is because batteries are expected to be
present in the circuit to handle operating transients. Largish output
filter caps might help it power more dynamic loads unassisted.

Switching the output (after any extra filter caps), rather than the
input, might be safer.

As I recall, a household type thermostatic controller normally expects
to switch 24VAC control lines, not AC mains directly. You might read
the info that came with it - this type of info will be printed pretty
clearly on the instructions.

RL

I'm being told this is rated at 2200mah as in 2.2amp/hours.
This is because it is a multi voltage PS.
Does this make sense?
Mike

L

#### legg

Jan 1, 1970
0
I'm being told this is rated at 2200mah as in 2.2amp/hours.
This is because it is a multi voltage PS.
Does this make sense?

No. mAh ratings are applied to batteries or other energy storage
devices only.

Adapters will have a voltage compliance limit, a power rating and a
current limit. Depending on the battery voltage, the power limit will
translate into a charging current P/V, below the current limit. The
voltage compliance represents open-circuit output or maximum float
voltage.

The adjustment required for different non-smart battery systems is
float voltage.

If there is some kind of intelligence in the adapter that relates to a
2200mAh battery rating, it could be either a guage recording
accumulated charge (irrelevant if prior state of charge is unknown) or
fixed charge rate (an arbitrary percentage of mAh rating for a
pre-stated or internally limited charging time duration).

Similar low power (<5W) wall plug adapters can often be found in junk
collections or Salvation Army / Goodwill Industry jumble bins for
fooling around with. They will be specifically designed for an
original (defunct) marked equipment model number, with varying fixed
label voltages and ratings. Maybe worth looking into if more info not
provided for your targeted new product purchase.

RL

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