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Topic: AS1130 Ongoing Discussion 132 Individually controllable, PWM LED driver (Read 17052 times) previous topic - next topic

funkyguy4000

If I did that, then I'd have to delete all my posts.  (Seriously whats up with that?)

Okay sounds good, I have a lot to do today (Speech -> clean room -> E-mail friend -> Finish internship cover letter)  But i might be able to get all that done in 5 or 6 hours.  Then I can make a build and try the code out.
Accelerate to 88 miles per hour.

Force



It's a shame they only do 1 package for this chip...it probably puts lots of designers off, not to mention hobbyists.

Well you can also get the Ssop-28 package which is available too.
that will solve your problem with soldering. The package was available shortly after the wlp.

Hexadec




It's a shame they only do 1 package for this chip...it probably puts lots of designers off, not to mention hobbyists.

Well you can also get the Ssop-28 package which is available too.
that will solve your problem with soldering. The package was available shortly after the wlp.


OOps...yep forgot about that... :smiley-red: :smiley-red:
Sponge.
I'm allowed to have it 'cos it's not sharp.

JoeN



I am very slowly designing a 4-layer board with some AS1130's. The biggest pain has been finding out that my usual cheap PCBAs don't want to do 0.5mm BGA/WLCSP.


It's a shame they only do 1 package for this chip...it probably puts lots of designers off, not to mention hobbyists.


They do?  I see a 28 TSSOP

AS1130-BSST

http://www.digikey.com/product-detail/en/AS1130-BSST/AS1130-BSSTCT-ND/3028666
I have only come here seeking knowledge. Things they would not teach me of in college.

funkyguy4000





It's a shame they only do 1 package for this chip...it probably puts lots of designers off, not to mention hobbyists.

Well you can also get the Ssop-28 package which is available too.
that will solve your problem with soldering. The package was available shortly after the wlp.


OOps...yep forgot about that... :smiley-red: :smiley-red:


we know
Accelerate to 88 miles per hour.

macegr

I know about the TSSOP, but it's actually way too big for my application.
Unique RGB LED Modules and Arduino shields: http://www.macetech.com/store

funkyguy4000

Unfortunately, to this day, I haven't been able to find anybody who can make a board that made for a WL-CSP footprint.
Its more of a massive company, large production kind of capability. 

If anybody knows of some fabricator, throw it out.
Accelerate to 88 miles per hour.

macegr

Most places that can handle 4mil rules can do it, but I still have to cheat by altering the shape of the outer BGA pads. A couple of PCBAs have reviewed this and seem to think it will work fine; one even said it's approximately what they would have done to my Gerbers without my asking.

Unique RGB LED Modules and Arduino shields: http://www.macetech.com/store

funkyguy4000

Hmmmm, my board isn't lighting up.
Do you really need the IRQ and the RSTN hooked up for your PWM sketch Hex?
If not, my circuit board must suck
Accelerate to 88 miles per hour.

Hexadec

Sorry about the delay...been away for a few days.... 8)

The RSTN pin needs to be pulled to logic 1 or the chip will keep resetting.

The IRQ pin has no effect whatsoever if you're using the PWM example code. (It's not used).

Are you using the code "as is" or modified?

Also let's see your hardware/schematic... ;)
Sponge.
I'm allowed to have it 'cos it's not sharp.

funkyguy4000

The code is not changed at all. 
Okay, I didn't solder a pin to my RSTN hole.  I'll see what I can do about getting one soldered on after some class tomorrow.  I just tried to heat up my iron in my dorm and I smelled awful.  Didn't want the alarm to go off.

Schematic...Lemme see...I can't find it right now, BUT! I know its right.  I went over it about seven times.  I always do a check like that before I send something to fab.
Accelerate to 88 miles per hour.

Force


Hexadec

Thanks for the link Mr Force...good to know for future reference.
Sponge.
I'm allowed to have it 'cos it's not sharp.

funkyguy4000

Lol, wow I feel dumb.  turns out a few of my pins weren't soldered to the pad on the AS1130.  Should look closer next time.
Good news is I have to go home to get my suit so I can solder those down.  I'll report back when I have it soldered down
Accelerate to 88 miles per hour.

Hexadec

I had a similar problem with one of my chips on the 528 LED board, it was intermittently working and after a lot of messing about I found 1 pin was not soldered properly!.

Remember it for the future (like I didn't)  :smiley-mr-green:
Sponge.
I'm allowed to have it 'cos it's not sharp.

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