• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 34 subscribers
  • Views 436 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.

TPD1E04U04: Understanding ESD requirements

Davis Grier44
Prodigy 50 points
Part Number: TPD1E04U04
Other Parts Discussed in Thread: HD3SS3212, , ESD321

Hello, I need to add  IEC 61000-4-2 Level 4 ESD protection to a USB 3.0 interface and considered the TPD1E04U04. The clamping voltage is ~9V at 16A TLP. However, the absolute maximum rating for the protected device (HD3SS3212) is Vcc + 0.5 (Vcc = 3.3V). It doesn't seem reasonable to find a voltage clamp that low. Do I misunderstand the design requirements?

  • 0
    TI__Prodigy 360 points

    Hi,

    Thanks for the questions, the abs max rating for the device is specified for a DC voltage while the clamping voltage is for an ESD nS duration waveform and most devices with a DC abs max  of <5V can sustain ESD clamping voltage >10V, which most devices can sustain. In the case of the TPD1E04U04, it would be typically one of the lowest clamping devices and should work well in your system unless there is a specific sensitivity which can be either tested on board with or without protection.

    Regards,
    Obi

  • 0 in reply to Obi Oji
    Prodigy 60 points

    Hi Obi,

    I have some ICs that work at 1.8V.

    How to check a device can sustain 10V ESD clamping voltage? Is there any clue in the device datasheet?

    Thank you,

    Tom

  • 0 in reply to Tom Nguyen1
    TI__Prodigy 360 points

    Hi unfortunately most datasheets do not provide the IEC ESD clamp tolerance but only the DC level abs max. It is typically done through empirical testing or experience or in case of a customer solution getting the information from the chip provider if they have it

    The best guidance I can provide is to use a device with a low working voltage and very low clamping voltage like the ESD321 which has a working voltage of 3.3V and clamping around 6V