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'[EE]: Urgent ST FJ0916CI datasheet'
2002\08\03@095230 by Morgan Olsson

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Hi guys

I now recieved a broke electic fence unit which needs to be repaired ASAP before the sheeps escape!

Problem is I can´t find info on the central IC.

The IC is made by ST microelectronics, marked FJ0916CI, datecode A9035

I have searched ST homepage datasheet search, both amongst current and obsolete parts, but no hit.

From what i can see from the design it is a flyback controller in 16 pin DIP.

I have other controllers in stock i can replace it with, just i can decode what it is doing in regards of frequency, duty cycle, regulation etc.
Therefor i need a data sheet.

I´ve got the general idea clear: the cirquit is a flyback isolated charger for a large capacitor, and when a certain voltage is reached a SCR fires to dump the charge into the HV pulse transformer to the fence.  Repeating.

Thanks in advance
/Morgan
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2002\08\03@113422 by Jim

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I'll venture in here in lieu of any other responses ATTM ...

Have you looked at products offered by ST microelectronics
and could you see something similar offered?

Sometimes 'house numbers' are used on devices purchased
by companies BUT they are in reality simply standard
products with the purchaser's part number stamped
on it.

Best I can do ...

RF Jim


{Original Message removed}

2002\08\03@135035 by Katinka Mills

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On Sat, 3 Aug 2002 23:18, you wrote:
> I'll venture in here in lieu of any other responses ATTM ...
>
> Have you looked at products offered by ST microelectronics
> and could you see something similar offered?
>
> Sometimes 'house numbers' are used on devices purchased
> by companies BUT they are in reality simply standard
> products with the purchaser's part number stamped
> on it.
>
> Best I can do ...
>
> RF Jim

In these situations I just look for chips that do this sort of function, then
at the chip pinouts, you can usually work out gnd and V+, this can help
narrow it down further, and then look at app notes for the ones left, most
designs I have found usually relate back to app notes :o)

Regards,

Kat.

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Perth, Western Australia
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2002\08\03@140035 by Morgan Olsson

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Hej Jim. Tack för ditt meddelande 16:18 2002-08-03 enligt nedan:
>I'll venture in here in lieu of any other responses ATTM ...
>
>Have you looked at products offered by ST microelectronics
>and could you see something similar offered?

Tried, but they are so plenty!

This seem to be a switcher controller with extra comparator/timer for firing the discharge SCR.

Now i have schematizised the unit and plan on attempting redesign the thing using a stock switcher controller + extra ckt.

>Sometimes 'house numbers' are used on devices purchased
>by companies BUT they are in reality simply standard
>products with the purchaser's part number stamped
>on it.

Yes.  I remember repairing an audio power amp with unusually marked transistors "PT7".  As spare part they were ridicously expensive, so i threw in dirt cheap ones i had on the shelf (The PCB layout was terrible anyway, the cost for that crap was only marketing obviously...) , and the wannabe audiofile owner said they sounded better...

>Best I can do ...

Thank for your reply :)

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