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Inquiry for overvoltage/reverse polarity voltage protection device recommendation

Grady Lee
Expert 2345 points
Other Parts Discussed in Thread: TMUX7462F, TMUX7308F, TMUX7412F, TMUX1072

Hi, TI expert

The customer has an inquiry about overvoltage/reverse polarity voltage protection device.

The required specifications are as follows.

------------------------------------------------------------------------------

- Overvoltage : Cut-off: 6.0V or less / Vin max: up to 25V

- Reverse polarity voltage: Vin max: +-25V

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Are there any suitable parts?

Please recommend. Thank you.

  • 0
    TI__Genius 10722 points

    Hi Grady,

    We do have some fault protection multiplexers that can possibly handle this application, but need a little more information:

    1) What is the supply voltage available?

    2) You need the overvoltage protection to kick in at 6V, and the device needs to be able to survive +/-25V overvoltages, is that correct?

    3) How many inputs do you need to protect?

    Thanks!

    Bryan

  • 0 in reply to Bryan Marshall
    Expert 2345 points

    Hi, Bryan

    I will answer your inquiry.

    1) What is the supply voltage available?

    Vin rated : USB 5V

    Vin Max: +25V

    2) You need the overvoltage protection to kick in at 6V, and the device needs to be able to survive +/-25V overvoltages, is that correct?

    : YES

    3) How many inputs do you need to protect?

    : USB 5V single supply

    Are there any suitable devices?

    Please Check. Thank you.

  • +1 in reply to Grady Lee
    TI__Genius 10722 points

    Hi Grady,

    Unfortunately, we do not have a device that can be powered only by a 5V rail and protect against those higher voltages. The closest device we have is the TMUX1072 which has a 6V OVP tripping point and can block voltages up to 18V. In addition, if you have the option to provide a higher supply rail (8V minimum), we also have devices that could protect against these voltages which are our TMUX7462F, TMUX7308F, or TMUX7412F devices.

    Thanks,

    Bryan