• State Resolved
  • Locked Locked
  • Replies 5 replies
  • Subscribers 32 subscribers
  • Views 1389 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Short Circuit in TM4C123GH6PM

muhammad moutiry
Intellectual 280 points
Other Parts Discussed in Thread: TM4C123GH6PM, EK-TM4C123GXL

Hello ,

I have made , by mistake, short circuit in tm4c123gh6pm , the U8 ic has been burnt

what is the function of this IC ?

and is there is any solution to make the kit work again ?

thanks ,

  • 0
    TI__Guru 72500 points

    You are referring to U8 on the EK-TM4C123GXL Launchpad board correct? U8 is a TPS73633DRB voltage regulator.  It regulates the 5V from the USB port down to 3.3V which is used by the TM4C123G part. The schematic for the EK-TM4C123GXL is in the back of the User's Guide.

  • 0 in reply to Bob Crosby
    Intellectual 280 points

    Thanks for replying ,

    U8 has 10 pins in  EK-TM4C123GXL , but when I saw the datasheet , I found that it has only 8 pins.

    I mean the IC that I shaped it with green square.

  • 0 in reply to muhammad moutiry
    Guru 13040 points
    Muhammad,
    The device has actually 8 pins. The 4 things you see on top and bottom are only thermal paths to reach the pad under the IC.
    It is a TPS73633DRB, supplied on 8VDFN exposed-pad case.
    Good luck soldering that by hand - not impossible by all means, but it takes some experience - and a good soldering iron and flux.
    Regards
    Bruno
  • 0 in reply to Bruno Saraiva
    Intellectual 280 points
    Hello Eng.Bruno ,
    Thank you very much.
    Regards
    Muhammad
  • 0 in reply to Bruno Saraiva
    Guru 117855 points

    Bravo Bruno - those (extra) escaping pins have "fooled" many!

    Note too: that thermal pad - upon the IC's "under-side" may complicate the IC's removal.

    In such a case - we find it (often) best to "clip each of the IC's pins - and then apply a properly sized solder tip and much solder flux - to those "thermal" exit pins.     The hope is that enough heat will transfer to enable the IC to be "lifted" from the "holding/solder-joined" pcb pad - WITHOUT DAMAGING that delicate & critical, pcb thermal pad!

    Minus the proper heat transfer between that Voltage Regulator - and the holding pcb - the "life" of the (replacement) Voltage Regulator may be far too short!    Care, Plan and Gentle Precision far trump YANK & RUSH!

    Many here would "Love to know" just what our poster did - to cause the Voltage Regulator to fail!    (so such can be avoided - by others!)