What IC is this?

Discussion in 'General Electronics Chat' started by iMayne, Oct 20, 2011.

  1. iMayne

    Thread Starter New Member

    Oct 20, 2011
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  2. BMorse

    Senior Member

    Sep 26, 2009
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    can not read any of the numbers on the IC, can you post the info or take a macro shot of the IC itself, without any information from the IC itself, no one can tell just by looking at it.
     
  3. iMayne

    Thread Starter New Member

    Oct 20, 2011
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    My camera is not that good. I've looked in a sunlight and I see LDPR and below "LDPR" I see "009C" I have searched for those and nothing. The IC has eight pins, four on each sides.
     
  4. SgtWookie

    Expert

    Jul 17, 2007
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    I have no idea either.

    To the upper left of the IC, looks like the upper end of the cap is blown off; down & left from the cap, the vertical resistor looks like it's upper end is damaged/gone and upper right corner is missing/chipped.
     
  5. iMayne

    Thread Starter New Member

    Oct 20, 2011
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    No. Above the IC are just points that has nothing. My only concern is in the red circle. As you can see some of its pins are damaged by corrosion. On the IC has "LDPR 0009C". Google has nothing on it.

    Here's a clear picture:

    http://www.flickr.com/photos/imayne/6263277933/
     
    Last edited: Oct 20, 2011
  6. SgtWookie

    Expert

    Jul 17, 2007
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    It's an LT3470A
    Product page: http://www.linear.com/product/LT3470A
    Datasheet: http://cds.linear.com/docs/Datasheet/3470afb.pdf
    Look under "Order Information" on page 2; LDPR is used as the marking on all three temp range parts.

    I first went to this site & page:
    http://www.qsl.net/dl7avf/smdcode/cl.html#TOC
    Didn't find LDPR, but found a couple of LDPx's that were Linear Technology part numbers. A quick search on Linears' site nailed it.

    For future reference, bookmark the index page:
    http://www.qsl.net/dl7avf/smdcode/index.html
     
  7. iMayne

    Thread Starter New Member

    Oct 20, 2011
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    Ahhhhhhh! Thanks! I was searching but found nothing. The next step is to find a seller that ships to the UK :)
     
  8. SgtWookie

    Expert

    Jul 17, 2007
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    Click here:
    http://www.linear.com/contact/intl_offices.php#uk

    Farnell UK doesn't have the LT3470A (250mA), but they have a couple versions of the LT3470 (200mA). Farnell indicates 300mA for one of them, but that is not correct. I suggest that you don't try the non-A suffix.

    I suggest you call the Linear Technology direct sales in Buckinghamshire; perhaps that is not that far from you.

    [eta]
    I did some more looking, and stand by the direct sales recommendation; everything else turned out to be a waste of time.
     
    Last edited: Oct 20, 2011
  9. iMayne

    Thread Starter New Member

    Oct 20, 2011
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    Thanks for the support throughout this. I'll give Linear a call and get the exact model. I'll report what they say tomorrow.
     
  10. iMayne

    Thread Starter New Member

    Oct 20, 2011
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    I have placed an order on their direct website. So I should expect them within two weeks. Our UK branch does not store parts. Thanks for the help!;)
     
  11. SgtWookie

    Expert

    Jul 17, 2007
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    OK, good deal. :)
     
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