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Blown Regulator!! SOS!

Discussion in 'General Electronics Discussion' started by JPU, Sep 1, 2012.

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  1. JPU

    JPU

    281
    1
    May 19, 2012
    Hi

    Would anyone have any idea why the 7815 on this circuit died. It is just putting out 4.1V

    The input is from a Lifepo4 battery 21v - 29V

    Any help appreciated,desperate as the unit has come back today and was a trial...It only worked for 4 hrs before blowing!!!

    The Regulator is marked TS7815 OF1 CZ

    Thanks

    JPU
     

    Attached Files:

  2. duke37

    duke37

    5,364
    769
    Jan 9, 2011
    The data sheet for the TS7815 that I saw said 23V max input. I could not find OF1 CZ.
     
  3. JPU

    JPU

    281
    1
    May 19, 2012
    Yes, I think you are correct. I saw the data somewhere and it says Max was 35V. Does that mean for a very short time.....

    Ie if running at 26.5 - 28V for long periods will this cause this sort of damage.

    Can you recommend a regulator that can deal with these requirements. I was hoping to get one from Maplin today but their site is awful!!

    Thanks
     
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