Hi, I let the smoke out of an IC on an induction motor speed control board. The IC is discontinued and is an SGS manufacture. Its a zero crossing triac driver. I am unable to find the pinouts or a schematic for it despite having googled all over the place. Can anyone help with this? If you email me please remove one of the three 'l's in the email address. thanks, Mike
ac
il
I googled in the UK and found this one for =A329...
snipped-for-privacy@tesco.net wrote in news: snipped-for-privacy@o5g2000hsb.googlegroups.com:
Thanks Pete. 29quid is a bit steep for an ic that cost about 2 quid when in common use. Alternatives do exist such as the OM5428 at I believe modest cost but from examination of the damaged pc board pinouts seem to be different. I'd like to modify the board for an om5428 (or another similar ic) but I cannot fathom all the pinouts from examination of the board - hence the desire for a schematic or datasheet for the L120AB. But thanks anyway. Mike
We used to use them, 'might' have one or two around, I'll have to look.
Pin 1 is Input Pin 2 is Current ref Pin 3 is 0V Pin 4 is Volt Ref Pin 5 is Output
We have the SGS-Thomson 1992 App's guide with the circuits etc.
Peter
-- Peter A Forbes Prepair Ltd, Luton, UK snipped-for-privacy@easynet.co.uk
Ignore that, wrong IC!!
Still checking...
Peter
-- Peter A Forbes Prepair Ltd, Luton, UK snipped-for-privacy@easynet.co.uk
What is different to the basic L120 ?
Have got that data sheet, 16-pin scr/triac driver/controller?
Peter
-- Peter A Forbes Prepair Ltd, Luton, UK snipped-for-privacy@easynet.co.uk
There may well be no difference - at least in pinouts. it sounds a very similar device - 16 pin triac driver/controller with zero crossing triggering capability. Possibly slightly different voltage/current ratings etc? If you have a data sheet for the L120 I'd be glad to have a look at that. The only pin I'm reasonably certain of is the trigger output, pin 7 on the l120ab.
Pin 1 Ramp Voltage Pin 2 Amplifier Output Pin 3 Non-Inv Amplifier Output Pin 4 DC ref Voltage Pin 5 Inv Amplifier Input Pin 6 Stabilised DC Supply Pin 7 Gate Pulse Output Pin 8 Positive Rectifier Supply Pin 9 AC Supply Pin 10 Negative Rectifier Supply Pin 11 Chopper Pin 12 Ground Pin 13 Ground Pin 14 NC Pin 15 Output Logic Circuit Pin 16 Current Generator
These are the pin descriptions from the data sheet.
Let me have your email address (mine is a valid reply-to) and I'll send you the pdf file.
Peter
-- Peter A Forbes Prepair Ltd, Luton, UK snipped-for-privacy@easynet.co.uk
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.