Connect with us

IC trying to identify from ST

Discussion in 'Troubleshooting and Repair' started by marcusmacman, May 15, 2015.

Scroll to continue with content
  1. marcusmacman

    marcusmacman

    6
    0
    May 15, 2015
    hi all,

    I'm trying to identify a component on a small AC/DC power module. It's an 8 pin surface mount IC made by STMicoelectronic and it has two identification markings

    1) ST E 9615 (the E doesn't look like a capitol E, it almost looks like a £ symbol?)

    2) 33428 (the second digit 3 could be an 8)

    If you have an help on where i can look or better still if you recognize this component would you let me know.
    kind regards
    Marcus
     
  2. davenn

    davenn Moderator

    13,991
    2,018
    Sep 5, 2009
    hi Marcus
    welcome :)

    show us a sharp well lit photo of the circuit board
     
  3. shrtrnd

    shrtrnd

    3,826
    527
    Jan 15, 2010
    Did you check the STMicroelectronics website?
    Manufacturers usually have a page in their data search functions with a break-down of their chip identification methods/codes.
     
  4. marcusmacman

    marcusmacman

    6
    0
    May 15, 2015
    Hi there, thanks for your replies. It's quite exciting getting back into electronics from a gap of 15 years and with forums like these. Appreciate any feedback.
    Attached should be the IC I'm trying to check. There is a resistor or something burnt out too but I thought if I can look to see what the chip is doing and I may be able to determine what the component is and its value.
    Thanks for your help and I'll check out the ST website.
    Kind regards
    Marcus
     

    Attached Files:

  5. davenn

    davenn Moderator

    13,991
    2,018
    Sep 5, 2009
  6. marcusmacman

    marcusmacman

    6
    0
    May 15, 2015
    thanks Dave, i think you are right. The component just above the chip is completely burnt out. I was hoping to determine what it could be and it's value based off the LM334 but i will need to do more studying :) attached is the component in question.
    thanks again for your help
    Marcus
     

    Attached Files:

  7. davenn

    davenn Moderator

    13,991
    2,018
    Sep 5, 2009
    ahhh that resistor .... wast really visible in your first pic

    and that 3 pin chip at the top is also toast ... its got a huge hole in it where it's gone bang
     
  8. marcusmacman

    marcusmacman

    6
    0
    May 15, 2015
    That's right, Big Bang !! My plan is to replace what I think didn't make it after the bang then start with a very high resistor and work down until it works. The module is an AC to DC converter with 4 DC outputs. I'll try and map the circuit and post it on here. That'll keep me busy for a while.
    Thanks
    Marcus
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-