Where to get A3949, how to replace it?

Hi!

i wanted to buy the A3949 for my extruder controller but i could not find a source for it.

It seems like Production ended because of low value, so how can i get one or how can i repalce it?

Thank you
user

[search.digikey.com]

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[www.hydraraptor.blogspot.com]

can i replace it with the l6505 and l6202?

or does the direction not work(two pins)

> can i replace it with the l6505 and l6202?
To use one of these, you would have to redesign the PCB layout, so it's probably quite a lot of hassle. If you want to do that anyway, I'd recommend to go for the official replacement part, the A3950 (smaller package).

Florian

im in the uk and im building the reprap electronics from pcbs ive bought off that auction site, im really struggling to find a3949 chips the right size, any ideas where i can get two?

Go to [www.findchips.com] and enter part number
It will list several suppliers of this chip

thanks but it is only showing stock on either through hole or a different packaging lay out, the ones i need are so16w(?)

Here. It looks like A3950 is the newer version of A3949.

thanks for the help, seems im flogging a dead horse, the 3950 is about half the size i need so wont fit on the pcb, not sure what to do now, seems that as i make a bit of progress with this thing im set back five paces by struggling with the next thing. ho hum!

As far as I can tell, this chip is not used in electronics more recent than Gen3. You could save yourself a lot of pain by switching to something more recent.

Failing that, there was a Gen3+ board which replaced the extruder controller with a daughter card that mounts to the sanguino header on the main board. Its built to drive a modern stepper extruder, which the original extruder controlled can only run in full step mode, and it can run a heated bed which I don't think the basic Gen3 can. This will also allow you to use modern firmware.

sounds about right, ive been building the boards for about 4 months now and the last pieces of the puzzle are the a3949 chips, thats all i need to complete......
its just my luck to get right to the end but not be able to complete because of something like this,