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pinouts for L120AB ic

  • Thread starter Michael Phillips
  • Start date
M

Michael Phillips

Jan 1, 1970
0
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
 
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

I googled in the UK and found this one for £29...
http://www.cricklewoodelectronics.c...226&js=n&xid=64b188e2539fa97577ca591d7008a3d4
Hope it helps
Pete
 
M

Michael Phillips

Jan 1, 1970
0
[email protected] wrote in
I googled in the UK and found this one for £29...
http://www.cricklewoodelectronics.com/Cricklewood/home.php?cat=226&js=n
&xid=64b188e2539fa97577ca591d7008a3d4 Hope it helps
Pete

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
 
P

Prepair Ltd

Jan 1, 1970
0
[email protected] wrote in


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
 
P

Prepair Ltd

Jan 1, 1970
0
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

Ignore that, wrong IC!!

Still checking...

Peter
 
P

Prepair Ltd

Jan 1, 1970
0
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

What is different to the basic L120 ?

Have got that data sheet, 16-pin scr/triac driver/controller?

Peter
 
M

Michael Phillips

Jan 1, 1970
0
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
[email protected]
http://www.prepair.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.
 
P

Prepair Ltd

Jan 1, 1970
0
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
 

GRIG

Dec 4, 2009
1
Joined
Dec 4, 2009
Messages
1
i'm searching for l120ab datasheet to use another ic pin to pin compatible.
Can you help me?
 

tuandaubac

Apr 12, 2010
4
Joined
Apr 12, 2010
Messages
4
Hello!
My name is Tuan.
I have a final year project about scr controller. I use Ic L120AB.
I'm searching for l120ab datasheet.
Please help me! Thank you!
 
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