Nationals Webench

[Ban]

When looking at a datasheet I found this simulator on Nationals site. It not
only creates the circuits makes a BOM and displays waveforms. The default
values are 1206 resistors and 0603 caps even with an old TO5 can opamp.
Worst is that you cannot do single supply filters.
You need to be (very) patient with the design and simulation.
I do not want to judge too fast, maybe someone can say something positive?

--
ciao Ban
Bordighera, Italy

 

[James Morrison]

On Tue, 2005-04-19 at 16:15 +0000, Ban wrote:

When looking at a datasheet I found this simulator on Nationals site. It not
only creates the circuits makes a BOM and displays waveforms. The default
values are 1206 resistors and 0603 caps even with an old TO5 can opamp.
Worst is that you cannot do single supply filters.
You need to be (very) patient with the design and simulation.
I do not want to judge too fast, maybe someone can say something positive?

How much did you pay for it? Oh, nothing. So don't complain. Anything
they are providing is a bonus.

It's a tool that is useful for all sorts of reasons but not for every
reason. Use at your own peril. In my experience it does generate
solutions that will work while not being optimal.

 

[Rene Tschaggelar]

Ban wrote:

When looking at a datasheet I found this simulator on Nationals site. It not
only creates the circuits makes a BOM and displays waveforms. The default
values are 1206 resistors and 0603 caps even with an old TO5 can opamp.
Worst is that you cannot do single supply filters.
You need to be (very) patient with the design and simulation.
I do not want to judge too fast, maybe someone can say something positive?

It didn't cost that much didn't it ?


Rene

 

[Ban]

Rene Tschaggelar wrote:

Ban wrote:

When looking at a datasheet I found this simulator on Nationals
site. It not only creates the circuits makes a BOM and displays
waveforms. The default values are 1206 resistors and 0603 caps even
with an old TO5 can opamp. Worst is that you cannot do single supply
filters. You need to be (very) patient with the design and simulation.
I do not want to judge too fast, maybe someone can say something
positive?


It didn't cost that much didn't it ?


Rene
Well, maybe we are spoiled by Linear Techs switcher cad, that not only is

free, but can be used in a professional way. The Spice engine always has
been free, and in the mean time all manufacturers offer free model for most
of their parts. They want us to design in their parts, don't they?

But what I do not like is, that this tool is apparently aimed at the
newcomer or software engineer with very few fixed circuits, but on the other
hand it tries to appear professional. Analog design seems to be forgotten,
if tools like this have to be used.
But then.. who uses or used this programm already?

--
ciao Ban
Bordighera, Italy

 

[Genome]

"Ban" <bansuri@web.de> wrote in message
news:98a9e.1259467$35.46372498@news4.tin.it...

When looking at a datasheet I found this simulator on Nationals site. It
not
only creates the circuits makes a BOM and displays waveforms. The default
values are 1206 resistors and 0603 caps even with an old TO5 can opamp.
Worst is that you cannot do single supply filters.
You need to be (very) patient with the design and simulation.
I do not want to judge too fast, maybe someone can say something positive?

--
ciao Ban
Bordighera, Italy

I think it's shit becoz I have to register.... So I did.

I am now registered as Arse Fuck.

e-mail ilike_spam@yahoo.co.uk
password Aa0-snookums

It's true, see the screenshot in ABSE.

You may have a free go courtesy of Arse Fuck Industries Ltd.

Dear Arse,

Thank you for creating your sign-on and notifications on National
Semiconductor's website. This email will confirm the creation of your
sign-on when you execute the URL link below.

Please click on the following link. If your email reader does not
allow you to click on links, then please enter the url into your
web browser :

CLICK HERE
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V
http://www.national.com/profile/confirm.cgi?

We will now be able to offer you the following benefits:

* Common form fields will pre-fill themselves, saving valuable time
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and design storage
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Regards,
Web Business at National

DNA

 

[Nico Coesel]

"Ban" <bansuri@web.de> wrote:

When looking at a datasheet I found this simulator on Nationals site. It not
only creates the circuits makes a BOM and displays waveforms. The default
values are 1206 resistors and 0603 caps even with an old TO5 can opamp.
Worst is that you cannot do single supply filters.
You need to be (very) patient with the design and simulation.
I do not want to judge too fast, maybe someone can say something positive?

Their thermal simulation for switchers is quite 'cool'. I like it.
Gives an idea of the power consumption of each component -which isn't
easy to calculate by hand-.
The rest of the calculations and transient response simulations are
not so interesting. I like to choose 1% E12 resistors (they don't). I
don't like tantalum caps (they do).
There isn't so much to gain or lose in the transient response, if you
use the chip, you're stuck with the transient response it has.

--
Reply to nico@nctdevpuntnl (punt=.)
Bedrijven en winkels vindt U op www.adresboekje.nl

 

[R.Lewis]

"Tim Shoppa" <shoppa@trailing-edge.com> wrote in message
news:1113937235.883021.56970@l41g2000cwc.googlegroups.com...

Analog design seems to be forgotten,
if tools like this have to be used.

Cookbook design will always be with us in one form or another.
Webbench is cookbook design with some frills. (Thermal modeling is a
cute frill to me, to others it's bread and butter!)

But what I do not like is, that this tool is apparently
aimed at the newcomer or software engineer with
very few fixed circuits, but on the other
hand it tries to appear professional.

Of course it appears professional... National almost certainly makes
money selling chips with it. At the same time, everyone realizes that
it's selecting designs from a cookbook and fleshing them out
automatically.

who uses or used this programm already?

It's kinda neat to put in some parameters and see it realized in some
standard topologies. It's a cookbook, and it knows all the standard
recipes. (Or, at least the recipes using National chips...)

Tim.

I have tried a few times but never managed to get it to give me anything -

even when a very basic 'simple swithcher' was keyed.
Is there some secret?

 

[Fred Bloggs]

Ban wrote:

But what I do not like is, that this tool is apparently aimed at the
newcomer or software engineer with very few fixed circuits, but on the other
hand it tries to appear professional. Analog design seems to be forgotten,
if tools like this have to be used.
But then.. who uses or used this programm already?

As far as I can tell from limited use of the simple switcher simulation,
the product is good- you can accurately explore all the boundary points
and transient responses. A good analog designer can use WebBench to
evaluate a part's performance in test circuits- not necessarily
identical with intended application circuit. One major benefit that
*could* come from this type of tightly controlled simulator is that
National can insert a much more accurate model without giving away
proprietary design information that could be derived from a detailed
published SPICE model.