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TPS61150 ESD rating

Walid
Prodigy 90 points
Other Parts Discussed in Thread: TPS61150

Hi,

I was wondering if anyone could provide details on ESD rating for TPS61150.  The data sheet doesn't list any ESD ratings for the part, just that it is ESD sensitive.  Can anyone say if TPS61150 is rated at 2kV, 6kV, or any other value?

Thanks,

Walid

  • 0
    TI__Genius 11575 points

    All semiconductor devices are ESD sensitive, but due to the fact that these sorts of power circuits are generally not connected to user accesible interfaces to the outside world (like connectors, etc...) it's unusual to spec an ESD rating for such a part.

    Usually, ESD becomes a prominent specification on devices such as USB, ethernet, RS485, etc... where wires are being plugged and un-plugged.

    Having said all that, there are certainly ESD structures build into the device pins, but the ratings were simply omitted as irrelevent.

    Do you need a rating on a particular pin?  Can you eleborate on your appplication?

  • 0 in reply to Antenna_Head
    Prodigy 90 points

    Our application is pretty typical, the device is used to drive two backlight LED strings in a 5" LCD panel.  Nothing out of the ordinary.  The board that has the TPS61150 is tested in a bed of nails in production and there's some concern that ESD might be damaging the TPS61150 during handling for testing or the test fixture.  We're measuring very low resistance between the ground pin (8) and the FET pins (6, 1, and 10) on the failed components, indicating that the FETs are blown.  So, ESD rating on pins 6, 1, and 10 might be a good starting point.

  • 0 in reply to Walid
    TI__Genius 11575 points

    This doesn't sound like an ESD problem. The transistors behind IFB1/IFB2 will be fairly large, and it would take a greate deal of energy to wipe out both of these, especially at the same time.

    Please confirm the integrity of the output capacitor (C2 of the data sheet, page 1).  If this capacitor if cracked or otherwise an open-circuit excessive voltage will be presented to IFB1/2 and harm the device.

    Best, steve