Which ic is this ?

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drdan1234

New Member

• Jun 15, 2010

• #1

hello there people ;
i am new to electronics .

i dont know if this question fits to be in this category .

i am copying a circuit of a UPS that runs on external lead acid battery.
it has an ic on it...the manufacturer has removed the initials written on the ic , leaving me no way to find out which ic is this ????

is there any way i can find out which IC is this ???

sincerely
dr.dan

 

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mgeno216

New Member

• Jun 15, 2010

• #2

Well, what are the specs on the circut you have. What is it rated for? I would assume that it is just a basic voltage regulator, it has 3 pins right? There are quite a few different kinds. It could be a LM317, LM338, LM7085C. They all have slightly different ratings so that would narrow it down.

Mike

 

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drdan1234

New Member

• Jun 30, 2010

• #3

some pics of the circuit to help you help me .

here are some pics of the circuit.

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full body with transformer and transistor plates ;


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Dx3

New Member

• Jun 30, 2010

• #4

Swell pics, but which chip is the regulator? How many legs does it have? Stuff like that.

 

Reloadron

Well-Known Member

Most Helpful Member

• Jun 30, 2010

• #5

I am guessing lower right beside the V on the board. The chip (14 pin) less any markings. That is my guess anyway.

Ron

 

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Dx3

New Member

• Jun 30, 2010

• #6

Oh. Had to widen my screen to see it. A 723 has 14 legs.

 

lilimike

Member

• Jun 30, 2010

• #7

I don't know if it is because the 14 pin chip is bigger and it caught all of your attention but it looks like also the 2 eight pins chips at the bottom have been grinded down.

Mike

 

Reloadron

Well-Known Member

Most Helpful Member

• Jul 1, 2010

• #8

lilimike said:

I don't know if it is because the 14 pin chip is bigger and it caught all of your attention but it looks like also the 2 eight pins chips at the bottom have been grinded down.

Mike

Click to expand...

Well I do believe you called it. Never noticed them and yes, I see nothing on them either. There is really no easy way to know or see what these chips are. Short of a schematic which obviously doesn't exist for the end user.

Ron