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TPS25200: Recommended TI part for hot plugging devices.

Kirk Vrigian
Prodigy 40 points
Part Number: TPS25200

Tool/software:

Hi

I'm looking into implementing a protection circuit that will allow me to "hot plug" or "hot swap" devices on a +3.3V power rail, the load also draws about 600mA. The idea is that my +3.3V rail can stay on at all times and i can safely plugin & unplug devices (with no communication or handshaking) on this rail without affecting the +3.3V rail. I'm assuming efuses would be the ideal candidate for this, I'm trying to save space so I'm also looking for something with low external component count needed to absolutely minimize the space needed.

Regards,

Kirk Vrigian

  • 0
    Prodigy 40 points

    What that being said, would the Efuse be placed on the load device or the source device (source side of the cable or load side of the cable)? The goal is that when i connect or disconnect a load device, it won't damage the source supply.

  • 0 in reply to Kirk Vrigian
    TI__Mastermind 38645 points

    Hi Kirk,

    Generally eFuses are placed at the load side in the applications where hot-plugging is involved. 

    During hot-plug, we expect transients to generate in the power path which can cause damage to the eFuse or your load. To prevent this, we highly recommend use of TVS diodes to clamp these transients below the abs max of the device.

    Best Regards,
    Arush