• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 32 subscribers
  • Views 914 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.

TSB41BA3A-EP - failed to solder the thermal pad to PCB

Kirk Horn
Prodigy 145 points

I have a customer that failed to solder the thermal pad on the subject part number to their PCB.  It is not know if there is a solder pad on the PCB or not.  The customer needs to know what failure modes and life expectancy the device might have if the board is put into service in this state.  It is clear to them that the data sheets expressly state that the solder pad must be soldered to the PCB but they are looking for guidance on what might happen to the device if the solder pad is not connected to the PCB. 

Thanks in advance for any comments you can make

Kirk Horn

Arrow Electronics

  • 0
    TI__Guru* 76130 points
    Hello,
    They will probably see a reduced life cycle due to the amount of heat dissipated by the die, grounding problems are also probably.
    I will ask to the Quality area if they have some results of destructive tests.
    Regards
  • 0 in reply to Elias Villegas M.
    TI__Guru* 76130 points
    Hello,
    Please see below response from QA:

    "I don’t have any data but I would not expect the device to work very well and most likely get damaged. We have seen many EOS jobs due to poor soldering of the powerpad. If the powerpad is not soldered the device will be very susceptible to damage from overheating. Also the powerpad is connected to GND so if it is not connected to the PCB then this could force a lot more current through the GND pins of the device than what is expected on those pins."