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Fuse is getting burn

Ashutosh Nahar
Intellectual 640 points
Other Parts Discussed in Thread: ASH

Hi,

I am facing one issue in my circuit.Issue is-

My board is working at 12V input. I am using fuse at the input side of 3A current rating.

As soon as I powered up the board, the fuse is getting burn(in some board).If I remove the fuse and short the board then the circuit is working fine and taking the current as same in the working board(having fuse)

I checked the impedance of the board and it is fine.

I replaced the fuse of the working board with this board then also it got burnt.

I am not able to debug the issue.Please help.

Thanks

Ash

  • 0
    TI__Genius 14317 points
    Hi Ashu,

    Are you using any TI devices on your board (DC-DC, LDO or other)? Have you looked at your 12V power on a scope and do you see any voltage spike at power up? Is your fuse the proper rating and is it slow or fast fuse? Can you attach your schematic?