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Hot Swap Protection

Maulik Patel
Prodigy 160 points
Other Parts Discussed in Thread: LM5116

Hello,

I am looking for some hot swap input protection on our device. Currently our product operate from 6V to 100V. Please let me know if there is something I can try. We are seeing couple of failure in the field with hot swap issue on our device. 

-Maulik

  • 0
    TI__Guru 71526 points

    Hello Maulik,

    We need some additional information as to what is in need of protection, please.  We have a large portfolio of Protection Devices, however, you have not described what part, or parts, of your product need protection (power, I/O, bus, etc); see: http://www.ti.com/lsds/ti/interface/circuit-protection/circuit-protection-overview.page .

    If you could provide a schematic, or block diagram with description, and perhaps the actual device that has failed, that will help us narrow down a proper selection.

    At your service,

    ~Leonard 

     

  • 0 in reply to LeonardEllis
    Prodigy 160 points

    Hello,

    We seen issue where our microprocessor is getting damage on first power up in the field. Generally our products gets mounted on commercial vehicle such as forklift, tow truck, etc.  Our product take minimum input of 6V and max Input of 100V. Max input current it can take about  2A. We have a main input regulator LM5116 which gives output of 5.5V. Then it gets distributed to other part of circuit board.

    Let me know if you need more information. I would like to try out if there are any eval board available to test it for hot swap using our product.

    -Maulik

  • 0 in reply to Maulik Patel
    Prodigy 160 points
    Hello,

    Any update/suggestion??

    -Maulik
  • 0 in reply to Maulik Patel
    TI__Mastermind 23845 points
    Hi Maulik,

    When you say the microprocessor get damaged, is the LM5116 also get damaged?
    I am trying to see where the voltage transient is located. The other thing is whether your buck regulator from 5.5V to 3.3V have a soft-start function. If not, then there is a possibility of a voltage overshoot on the 3.3V rail that damages your microprocessor

    Thanks
    -Arief