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From: Kari Laine on 28 Mar 2010 15:07
Hi,

I am trying to find schematics for PSUs. I found one, probably good one,
but it was very complicated and used an IC, which I probably won't get
anywhere.
So any good links welcome.

I understand the sub 3A PSUs somehow. But for example a 12V/60A ones are
mystery to me. One person told me that they use FET's. Are they
basically like the PC Power supply? But how they make the controllable
between 1.5 -- 12V with full load?

Any schema ?

I hope my continued questions are not regarded as spam...

Best Regards
Kari

--
PIC - ARM - DISPLAYS - RELAYS - MODULES - CONVERTERS - I2C - SPI -
KEYPADS - ACCESSORIES
http://www.byvac.com (I am just a satisfied customer)
From: Hammy on 28 Mar 2010 14:10
On Sun, 28 Mar 2010 22:07:59 +0300, Kari Laine <klaine8(a)gmail.com>
wrote:

>Hi,
>
>I am trying to find schematics for PSUs. I found one, probably good one,
>but it was very complicated and used an IC, which I probably won't get
>anywhere.
>So any good links welcome.
>
>I understand the sub 3A PSUs somehow. But for example a 12V/60A ones are
>mystery to me. One person told me that they use FET's. Are they
>basically like the PC Power supply? But how they make the controllable
>between 1.5 -- 12V with full load?
>
>Any schema ?
>
>I hope my continued questions are not regarded as spam...
>
>Best Regards
>Kari

It's most likely a Switched Mode Power Supply (SMPS). I'm not saying
it couldnt be a linear regulator without seeing it,but at that power
level 720W its likely an SMPS.

You might want to try something less ambtious if this is your first
foray into SMPS's . They can be difficult at 7W let alone 700W.

A good basic IC to use; to learn some basics about variable linear
regulators is the old LM723. You will soon see the problems and
expense of building a linear regulator at 12V/60A.

A good basic SMPS CONTROLLER to use is the NCP3063 which is an
upgraded version of the old MC34063A-D.

http://www.intusoft.com/onsemipdfs/AN920-D.pdf

LM723
http://eu.st.com/stonline/books/pdf/docs/4553.pdf

Googling anyone of those part numbers will get you a wealth of info.

Everything you could want to know about SMPS well almost; nothing
beats frying a few controllers and what not on the bench;-)

http://www.smps.us/

basic simulator

http://schmidt-walter.eit.h-da.de/smps_e/smps_e.html

Small steps first grasshopper;-)
From: Hammy on 28 Mar 2010 14:23
On Sun, 28 Mar 2010 14:10:11 -0400, Hammy <spam(a)spam.com> wrote:

>On Sun, 28 Mar 2010 22:07:59 +0300, Kari Laine <klaine8(a)gmail.com>
>wrote:
>
>>Hi,
>>
>>I am trying to find schematics for PSUs. I found one, probably good one,
>>but it was very complicated and used an IC, which I probably won't get
>>anywhere.
>>So any good links welcome.
>>
>>I understand the sub 3A PSUs somehow. But for example a 12V/60A ones are
>>mystery to me. One person told me that they use FET's. Are they
>>basically like the PC Power supply? But how they make the controllable
>>between 1.5 -- 12V with full load?
>>
>>Any schema ?
>>
>>I hope my continued questions are not regarded as spam...
>>
>>Best Regards
>>Kari
>
>It's most likely a Switched Mode Power Supply (SMPS). I'm not saying
>it couldnt be a linear regulator without seeing it,but at that power
>level 720W its likely an SMPS.
>
>You might want to try something less ambtious if this is your first
>foray into SMPS's . They can be difficult at 7W let alone 700W.
>
>A good basic IC to use; to learn some basics about variable linear
>regulators is the old LM723. You will soon see the problems and
>expense of building a linear regulator at 12V/60A.
>
>A good basic SMPS CONTROLLER to use is the NCP3063 which is an
>upgraded version of the old MC34063A-D.
>
>http://www.intusoft.com/onsemipdfs/AN920-D.pdf
>
>LM723
>http://eu.st.com/stonline/books/pdf/docs/4553.pdf
>
>Googling anyone of those part numbers will get you a wealth of info.
>
>Everything you could want to know about SMPS well almost; nothing
>beats frying a few controllers and what not on the bench;-)
>
>http://www.smps.us/
>
>basic simulator
>
>http://schmidt-walter.eit.h-da.de/smps_e/smps_e.html
>
>Small steps first grasshopper;-)

I should've added this. Browsing manufacturers sites can get a lot of
your questions answered. For instance

http://www.onsemi.com/PowerSolutions/supportDoc.do?type=manuals

What you want is

Linear & Switching Voltage Regulator Handbook

and

SWITCHMODE� Power Supply Reference Manual

LT has a free SIMULATOR get it here.

http://www.linear.com/designtools/software/ltspice.jsp

From: Jon Kirwan on 28 Mar 2010 17:06
On Sun, 28 Mar 2010 14:23:23 -0400, Hammy <spam(a)spam.com>
wrote:

>On Sun, 28 Mar 2010 14:10:11 -0400, Hammy <spam(a)spam.com> wrote:
>
>>On Sun, 28 Mar 2010 22:07:59 +0300, Kari Laine <klaine8(a)gmail.com>
>>wrote:
>>
>>>Hi,
>>>
>>>I am trying to find schematics for PSUs. I found one, probably good one,
>>>but it was very complicated and used an IC, which I probably won't get
>>>anywhere.
>>>So any good links welcome.
>>>
>>>I understand the sub 3A PSUs somehow. But for example a 12V/60A ones are
>>>mystery to me. One person told me that they use FET's. Are they
>>>basically like the PC Power supply? But how they make the controllable
>>>between 1.5 -- 12V with full load?
>>>
>>>Any schema ?
>>>
>>>I hope my continued questions are not regarded as spam...
>>>
>>>Best Regards
>>>Kari
>>
>>It's most likely a Switched Mode Power Supply (SMPS). I'm not saying
>>it couldnt be a linear regulator without seeing it,but at that power
>>level 720W its likely an SMPS.
>>
>>You might want to try something less ambtious if this is your first
>>foray into SMPS's . They can be difficult at 7W let alone 700W.
>>
>>A good basic IC to use; to learn some basics about variable linear
>>regulators is the old LM723. You will soon see the problems and
>>expense of building a linear regulator at 12V/60A.
>>
>>A good basic SMPS CONTROLLER to use is the NCP3063 which is an
>>upgraded version of the old MC34063A-D.
>>
>>http://www.intusoft.com/onsemipdfs/AN920-D.pdf
>>
>>LM723
>>http://eu.st.com/stonline/books/pdf/docs/4553.pdf
>>
>>Googling anyone of those part numbers will get you a wealth of info.
>>
>>Everything you could want to know about SMPS well almost; nothing
>>beats frying a few controllers and what not on the bench;-)
>>
>>http://www.smps.us/
>>
>>basic simulator
>>
>>http://schmidt-walter.eit.h-da.de/smps_e/smps_e.html
>>
>>Small steps first grasshopper;-)
>
>I should've added this. Browsing manufacturers sites can get a lot of
>your questions answered. For instance
>
>http://www.onsemi.com/PowerSolutions/supportDoc.do?type=manuals
>
>What you want is
>
>Linear & Switching Voltage Regulator Handbook
>
>and
>
>SWITCHMODE� Power Supply Reference Manual
>
>LT has a free SIMULATOR get it here.
>
>http://www.linear.com/designtools/software/ltspice.jsp

UNITRODE has had some nice seminars and books on the subject,
as well. TI has taken over and has them on their site.

There are a number of archived seminars here:
http://focus.ti.com/docs/training/catalog/events/event.jhtml?sku=SEM401001

Plus later ones here:
http://focus.ti.com/docs/training/catalog/events/event.jhtml?sku=SEM405006
http://focus.ti.com/docs/training/catalog/events/event.jhtml?sku=SEM406008
http://focus.ti.com/docs/training/catalog/events/event.jhtml?sku=SEM408003

These seminars also include a number of topics, such as:
http://focus.ti.com/lit/ml/slup168/slup168.pdf
http://focus.ti.com/lit/ml/slup169/slup169.pdf
http://focus.ti.com/lit/ml/slup170/slup170.pdf
http://focus.ti.com/lit/ml/slup171/slup171.pdf
http://focus.ti.com/lit/ml/slup172/slup172.pdf
http://focus.ti.com/lit/ml/slup173/slup173.pdf
http://focus.ti.com/lit/ml/slup174/slup174.pdf

The Unitrode Magnetics Design Handbook, MAG 100A, is at:
http://focus.ti.com/docs/training/catalog/events/event.jhtml?sku=SEM401014

The book itself is labeled SLUP003, but I don't know where to
find that exact PDF file. Perhaps someone else can.

Jon
From: Kari Laine on 29 Mar 2010 07:54
Jon Kirwan wrote:
> On Sun, 28 Mar 2010 14:23:23 -0400, Hammy <spam(a)spam.com>
> wrote:
>
>> On Sun, 28 Mar 2010 14:10:11 -0400, Hammy <spam(a)spam.com> wrote:
>>
>>> On Sun, 28 Mar 2010 22:07:59 +0300, Kari Laine <klaine8(a)gmail.com>
>>> wrote:
>>>
>>>> Hi,
>>>>
>>>> I am trying to find schematics for PSUs. I found one, probably good one,
>>>> but it was very complicated and used an IC, which I probably won't get
>>>> anywhere.
>>>> So any good links welcome.
>>>>
>>>> I understand the sub 3A PSUs somehow. But for example a 12V/60A ones are
>>>> mystery to me. One person told me that they use FET's. Are they
>>>> basically like the PC Power supply? But how they make the controllable
>>>> between 1.5 -- 12V with full load?
>>>>
>>>> Any schema ?
>>>>
>>>> I hope my continued questions are not regarded as spam...
>>>>
>>>> Best Regards
>>>> Kari
>>> It's most likely a Switched Mode Power Supply (SMPS). I'm not saying
>>> it couldnt be a linear regulator without seeing it,but at that power
>>> level 720W its likely an SMPS.
>>>
>>> You might want to try something less ambtious if this is your first
>>> foray into SMPS's . They can be difficult at 7W let alone 700W.
>>>
>>> A good basic IC to use; to learn some basics about variable linear
>>> regulators is the old LM723. You will soon see the problems and
>>> expense of building a linear regulator at 12V/60A.
>>>
>>> A good basic SMPS CONTROLLER to use is the NCP3063 which is an
>>> upgraded version of the old MC34063A-D.
>>>
>>> http://www.intusoft.com/onsemipdfs/AN920-D.pdf
>>>
>>> LM723
>>> http://eu.st.com/stonline/books/pdf/docs/4553.pdf
>>>
>>> Googling anyone of those part numbers will get you a wealth of info.
>>>
>>> Everything you could want to know about SMPS well almost; nothing
>>> beats frying a few controllers and what not on the bench;-)
>>>
>>> http://www.smps.us/
>>>
>>> basic simulator
>>>
>>> http://schmidt-walter.eit.h-da.de/smps_e/smps_e.html
>>>
>>> Small steps first grasshopper;-)
>> I should've added this. Browsing manufacturers sites can get a lot of
>> your questions answered. For instance
>>
>> http://www.onsemi.com/PowerSolutions/supportDoc.do?type=manuals
>>
>> What you want is
>>
>> Linear & Switching Voltage Regulator Handbook
>>
>> and
>>
>> SWITCHMODE� Power Supply Reference Manual
>>
>> LT has a free SIMULATOR get it here.
>>
>> http://www.linear.com/designtools/software/ltspice.jsp
>
> UNITRODE has had some nice seminars and books on the subject,
> as well. TI has taken over and has them on their site.
>
> There are a number of archived seminars here:
> http://focus.ti.com/docs/training/catalog/events/event.jhtml?sku=SEM401001
>
> Plus later ones here:
> http://focus.ti.com/docs/training/catalog/events/event.jhtml?sku=SEM405006
> http://focus.ti.com/docs/training/catalog/events/event.jhtml?sku=SEM406008
> http://focus.ti.com/docs/training/catalog/events/event.jhtml?sku=SEM408003
>
> These seminars also include a number of topics, such as:
> http://focus.ti.com/lit/ml/slup168/slup168.pdf
> http://focus.ti.com/lit/ml/slup169/slup169.pdf
> http://focus.ti.com/lit/ml/slup170/slup170.pdf
> http://focus.ti.com/lit/ml/slup171/slup171.pdf
> http://focus.ti.com/lit/ml/slup172/slup172.pdf
> http://focus.ti.com/lit/ml/slup173/slup173.pdf
> http://focus.ti.com/lit/ml/slup174/slup174.pdf
>
> The Unitrode Magnetics Design Handbook, MAG 100A, is at:
> http://focus.ti.com/docs/training/catalog/events/event.jhtml?sku=SEM401014
>
> The book itself is labeled SLUP003, but I don't know where to
> find that exact PDF file. Perhaps someone else can.
>
> Jon

Thank you VERY much for all of this information. Would keep me busy some
time to come :-)

Best Regards
Kari

--
PIC - ARM - DISPLAYS - RELAYS - MODULES - CONVERTERS - I2C - SPI -
KEYPADS - ACCESSORIES
http://www.byvac.com (I am just a satisfied customer)
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Prev: Idiots, we all will be killed in a couple of days. Write to Genevaand plead the citizens of Geneva to block the entrances to LHC.
Next: Tomorrow, the 30-th of March, despite to our protests, CERN plans to perform the first collisions of protons with the energy 3.5 TeV per proton (7 TeV per collision).