kicad-developers team mailing list archive

[Miguel Angel Ajo Pelayo <miguelangel@xxxxxxx>]

Yes, the board seems quite tight, mine is for 9A, It's a simple HP led
driver
for an special application, and I'm suffering :-)

What do you mean for IPS? :)

And, yes, it seems that I'll have to go for 70um copper if I want to give
the
current I need.  I've made 70um ~0.254mm clearance before, why did you need
0.8mm ? It's huge!! :)

About your drawings, may be we could put some section at the kicad site,
with
production drawings, to have showcase to users, and let other companies know
that kicad is used also in professional environment

Greetings dude! ;)

2012/5/18 Lorenzo Marcantonio <l.marcantonio@xxxxxxxxxxxx>

> On Fri, May 18, 2012 at 08:34:45AM +0200, Miguel Angel Ajo Pelayo wrote:
> > Yes, It's just a little board -yet-,
> >
> > Component arrays make blocks more complicate, I tend not to use them
> > (unless for buses). But sometimes you just need them (cost
> constraining...)
>
> Just for fun, here's a production example (it's a commercial board but
> you can put the PDF layout on the site for showcasing).
>
> http://www.logossrl.com/LGS-ATL-2-Layout.pdf
>
> Straight from the fabrication docs, is a typical mixed signal design:
> the *big* terminal blocks on the left are power input and two 30A PWM
> outputs (well they *could* do more, but there's a fuse): first array,
> notice the dual recirculation diode between the two fets, on the other
> side there are gate drivers and current senses (dual driver and
> amplifier).
>
> On the top an array of 8 IPS switches (thanks IRF for these magnificent
> devices). Gate resistors are two arrays below the buzzer (in square B3),
> status leds just on the right.
>
> The four 4x2 headers on lower right are an array of differential inputs
> multiplexed and tied to a PGA (with their TVS), lower center yet another
> array of 6 analog inputs (you see the conditioning resistors just above
> them and the tvs blocks on the sides).
>
> The real fun thing was pulling the display lines up there between the
> IPS and the power supply :D
>
> Oh, and, of course, someone said that the board was *too big*... done
> with 0.8 clearance since its a 70µm copper you can guess how much tracks
> are crowded near the MPU (look at the vias...). Even more funny is that
> this board is 'too big' but it's meant do be installed on a 350Kg
> machine on casters!
>
> (hobbysts are lucky when designing, it seems...)
>
> --
> Lorenzo Marcantonio
> Logos Srl
>
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-- 

Miguel Angel Ajo Pelayo
http://www.nbee.es
+34 636 52 25 69
skype: ajoajoajo