deciphering an application circuit--UAA2016

MrDEB · Post by **MrDEB** » Sun Oct 16, 2011 11:22 pm

I Emailed ON Semiconductor but they can't provide any input like HUUA??
Found this device while trying to build a temp ctr soldering iron as per this HAJJO schematic http://www.n0ss.net/hakko_936_schem-pcb_&_mod_v1r7.pdf
Built and found several descripencies between the PCboard layout and the schematic.
Well instead of trying to decipher the problems I am going with a PIC controlled soldering iron.
Could use the easy way out by just using an opti-coupler/triac (ON/OFF) but this UAA2016 looks like a better control solution using PWM via zero crossing.
The app circuit has lots of math which I get lost with. Hoping someone can config the app circuit then I can breadboard and go from there.
Page 3 on datasheet has app circuit.

Post by **brad** » Mon Oct 17, 2011 8:55 pm

Looks like you have quite a project on your hands there!

what microcontroller are you using for the circuit?

MrDEB · Post by **MrDEB** » Tue Oct 18, 2011 1:23 am

Going to use an 18F4520 or 452. basically same pic.
If I can't figure out the UAA2016 then just using a opti coupler (ho hum)
My Komec 936 broke the heater element, purchased the HAKKO907 iron off Ebay for $12.
I got spoiled using a temp ctr iron and mst of hat I have to assemble is sMD so I am kinda at a standstill. The PIC ctr soldering iron is going to be perf boarded w/ dip.
will post present schematic after I add an opti-couplier, couple of LEDs then compress. Its using Diptrace (GREAT PROGRAM)

MrDEB · Post by **MrDEB** » Tue Oct 18, 2011 6:55 am

found an archived data sheet for the UAA2016
http://www2.renesas.com/maps_download/pdf/SEA-1201A.pdf
any help would be appreciated.

Post by **brad** » Wed Oct 19, 2011 8:48 pm

What help are you looking for with it?

MrDEB · Post by **MrDEB** » Thu Oct 20, 2011 12:27 am

I contacted ON semiconductor about the app schematic on page 3 but no help.
Going a different direction at present just using an MOC3023 opti coupler.
Would really want to use the UAA2016 but??

Post by **brad** » Fri Oct 21, 2011 6:27 am

What do you think the advantage would be using the UAA2016 over an opto-coupler?

MrDEB · Post by **MrDEB** » Fri Nov 25, 2011 11:15 pm

The advantage would be I could then utilize zero cross thus less shock of ON/OFF.
Better control of the temperature as well by using PWM.
The HAKKO soldering iron to mention one, utilizes zero crossing.
an example http://www.fairchildsemi.com/an/AN/AN-3006.pdf

Post by **brad** » Sat Nov 26, 2011 7:45 am

Oh I see now!

Very good practice

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deciphering an application circuit--UAA2016

deciphering an application circuit--UAA2016

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