Tech dies...
CRT..dead.
HD DVD ..dead.
Floppy..dead.
But is silicon steel transformers in consumer electronics...dead?
Are block of steel wallwarts disappearing?
Consider: My cellphone charger feels like an empty plastic box.

So...
I wonder which branch of smps is dominant in consumer electronics?
Resonant? Or, non-resonant?

What is powering LCD displays, audio amplifiers, phone chargers, laser
printers and computers?


Going off the rails... :P

Class D + smps supply <<Now that's a marriage.
And that's not a gay marriage...smps's are female and class D amps are
male :P

http://www.wordreference.com/fren/amplificateur
Amplifier is male in french.

http://fr.wikipedia.org/wiki/Alimentation_%C3%A0_d%C3%A9coupage
But I don't know yet if it's female..



D from BC
myrealaddress(at)comic(dot)com
British Columbia
Canada

D from BC <m...@comic.com> wrote in 
news:h...@4ax.com:

> Tech dies...
> CRT..dead.
> HD DVD ..dead.
> Floppy..dead.
> But is silicon steel transformers in consumer electronics...dead?
> Are block of steel wallwarts disappearing?
> Consider: My cellphone charger feels like an empty plastic box.
> 
> So...
> I wonder which branch of smps is dominant in consumer electronics?
> Resonant? Or, non-resonant?

flyback/PWM.
non-resonant for really high powered stuff.(not necessarily consumer stuff)
High-end home audio probably still uses iron-core,to eliminate switching 
noise.


the old TEK 7904/A,7844,7834,7704/A o'scopes all used series-resonant PS.
newer TDS models use flyback supplies.

> 
> What is powering LCD displays, audio amplifiers, phone chargers, laser
> printers and computers?

I opened up an old car cellphone charger,and there's just a 34061 PWM 
regulator chip circuit inside.

PC supplies are PWM flybacks. Probably the same for printers. 
LCD displays use a HF DC-DC inverter,with a tiny SMD inductor/xfmr.


-- 
Jim Yanik
jyanik
at
kua.net

ooopss...correction 
Silicon
D from BC
myrealaddress(at)comic(dot)com
British Columbia
Canada

On 26 Jan 2009 21:49:29 GMT, Jim Yanik <j...@abuse.gov> wrote:

>D from BC <m...@comic.com> wrote in 
>news:h...@4ax.com:
>
>> Tech dies...
>> CRT..dead.
>> HD DVD ..dead.
>> Floppy..dead.
>> But is silicon steel transformers in consumer electronics...dead?
>> Are block of steel wallwarts disappearing?
>> Consider: My cellphone charger feels like an empty plastic box.
>> 
>> So...
>> I wonder which branch of smps is dominant in consumer electronics?
>> Resonant? Or, non-resonant?
>
>flyback/PWM.
>non-resonant for really high powered stuff.(not necessarily consumer stuff)
>High-end home audio probably still uses iron-core,to eliminate switching 
>noise.
>
>
>the old TEK 7904/A,7844,7834,7704/A o'scopes all used series-resonant PS.
>newer TDS models use flyback supplies.
>
>> 
>> What is powering LCD displays, audio amplifiers, phone chargers, laser
>> printers and computers?
>
>I opened up an old car cellphone charger,and there's just a 34061 PWM 
>regulator chip circuit inside.
>
>PC supplies are PWM flybacks. Probably the same for printers. 
>LCD displays use a HF DC-DC inverter,with a tiny SMD inductor/xfmr.

Wow....Lots of flyback.. 
Out of the pile of textbook topologies, flyback sounds like the winner
for consumer power supplies.

Was that flyback for the LCD display too?


D from BC
myrealaddress(at)comic(dot)com
British Columbia
Canada

Jim Yanik wrote:
> 
> D from BC <m...@comic.com> wrote in
> news:h...@4ax.com:
> 
> > Tech dies...
> > CRT..dead.
> > HD DVD ..dead.
> > Floppy..dead.
> > But is silicon steel transformers in consumer electronics...dead?
> > Are block of steel wallwarts disappearing?
> > Consider: My cellphone charger feels like an empty plastic box.
> >
> > So...
> > I wonder which branch of smps is dominant in consumer electronics?
> > Resonant? Or, non-resonant?
> 
> flyback/PWM.
> non-resonant for really high powered stuff.(not necessarily consumer stuff)
> High-end home audio probably still uses iron-core,to eliminate switching
> noise.

Its easier to filter 100 kHz switching noise out of high end audio than
60 Hz (plus harmonics caused by non-linearities in magnetics).

The LF magnetics will continue to be used in audio gear because that's
the easiest way to make it heavier and give the audiophools a false
sense of quality. Particularly since RoHS regs prohibit weighing it down
with lead or spent U238.
 
-- 
Paul Hovnanian     mailto:P...@Hovnanian.com
------------------------------------------------------------------
The ark was skippered by amateurs, the Titanic was skippered by
professionals.

On Mon, 26 Jan 2009 17:25:23 -0800, "Paul Hovnanian P.E."
<p...@hovnanian.com> wrote:

>Jim Yanik wrote:
>> 
>> D from BC <m...@comic.com> wrote in
>> news:h...@4ax.com:
>> 
>> > Tech dies...
>> > CRT..dead.
>> > HD DVD ..dead.
>> > Floppy..dead.
>> > But is silicon steel transformers in consumer electronics...dead?
>> > Are block of steel wallwarts disappearing?
>> > Consider: My cellphone charger feels like an empty plastic box.
>> >
>> > So...
>> > I wonder which branch of smps is dominant in consumer electronics?
>> > Resonant? Or, non-resonant?
>> 
>> flyback/PWM.
>> non-resonant for really high powered stuff.(not necessarily consumer stuff)
>> High-end home audio probably still uses iron-core,to eliminate switching
>> noise.
>
>Its easier to filter 100 kHz switching noise out of high end audio than
>60 Hz (plus harmonics caused by non-linearities in magnetics).
>
>The LF magnetics will continue to be used in audio gear because that's
>the easiest way to make it heavier and give the audiophools a false
>sense of quality. Particularly since RoHS regs prohibit weighing it down
>with lead or spent U238.
> 

lol...
That gives me an idea..
The concrete amplifier!
Encapsulate a class D + smps in flooring cement.
It's heavy. It's cheap...And it doesn't do anything..

"For that solid sound!" :)
(Was that on the list? re:other thread)


D from BC
myrealaddress(at)comic(dot)com
British Columbia
Canada

D from BC wrote:

> ooopss...correction 
> Silicon
> D from BC
> myrealaddress(at)comic(dot)com
> British Columbia
> Canada
   Boob!  (tee hee)

Paul Hovnanian P.E. wrote:

> Jim Yanik wrote:
> 
>>D from BC <m...@comic.com> wrote in
>>news:h...@4ax.com:
>>
>>
>>>Tech dies...
>>>CRT..dead.
>>>HD DVD ..dead.
>>>Floppy..dead.
>>>But is silicon steel transformers in consumer electronics...dead?
>>>Are block of steel wallwarts disappearing?
>>>Consider: My cellphone charger feels like an empty plastic box.
>>>
>>>So...
>>>I wonder which branch of smps is dominant in consumer electronics?
>>>Resonant? Or, non-resonant?
>>
>>flyback/PWM.
>>non-resonant for really high powered stuff.(not necessarily consumer stuff)
>>High-end home audio probably still uses iron-core,to eliminate switching
>>noise.
> 
> 
> Its easier to filter 100 kHz switching noise out of high end audio than
> 60 Hz (plus harmonics caused by non-linearities in magnetics).
> 
> The LF magnetics will continue to be used in audio gear because that's
> the easiest way to make it heavier and give the audiophools a false
> sense of quality. Particularly since RoHS regs prohibit weighing it down
> with lead or spent U238.
>  
   Well, if you *really* want a lot of weight in a small volume, just 
use osmium...

D from BC wrote:

> On Mon, 26 Jan 2009 17:25:23 -0800, "Paul Hovnanian P.E."
> <p...@hovnanian.com> wrote:
> 
> 
>>Jim Yanik wrote:
>>
>>>D from BC <m...@comic.com> wrote in
>>>news:h...@4ax.com:
>>>
>>>
>>>>Tech dies...
>>>>CRT..dead.
>>>>HD DVD ..dead.
>>>>Floppy..dead.
>>>>But is silicon steel transformers in consumer electronics...dead?
>>>>Are block of steel wallwarts disappearing?
>>>>Consider: My cellphone charger feels like an empty plastic box.
>>>>
>>>>So...
>>>>I wonder which branch of smps is dominant in consumer electronics?
>>>>Resonant? Or, non-resonant?
>>>
>>>flyback/PWM.
>>>non-resonant for really high powered stuff.(not necessarily consumer stuff)
>>>High-end home audio probably still uses iron-core,to eliminate switching
>>>noise.
>>
>>Its easier to filter 100 kHz switching noise out of high end audio than
>>60 Hz (plus harmonics caused by non-linearities in magnetics).
>>
>>The LF magnetics will continue to be used in audio gear because that's
>>the easiest way to make it heavier and give the audiophools a false
>>sense of quality. Particularly since RoHS regs prohibit weighing it down
>>with lead or spent U238.
>>
> 
> 
> lol...
> That gives me an idea..
> The concrete amplifier!
> Encapsulate a class D + smps in flooring cement.
> It's heavy. It's cheap...And it doesn't do anything..
> 
> "For that solid sound!" :)
> (Was that on the list? re:other thread)
> 
> 
> D from BC
> myrealaddress(at)comic(dot)com
> British Columbia
> Canada
   Ad continues: "...a REAL brick...".

On Mon, 26 Jan 2009 22:27:10 -0800, Robert Baer wrote:
> Paul Hovnanian P.E. wrote:
...
>> with lead or spent U238.
>>  
>    Well, if you *really* want a lot of weight in a small volume, just 
> use osmium...

Wasn't Ozzie Osmium the first "heavy metal" musician? ;-)

Cheers!
Rich