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Really really really light power pack

Discussion in 'Hobby Electronics' started by Michael C, Jul 1, 2005.

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  1. Michael C

    Michael C Guest

    I bought an accessory for my mobile phone the other day that comes with a
    power pack. The power pack is amazingly light and feels like there's nothing
    in it at all. What do they put in them these days? I presume it's not a

  2. **SMPS.
  3. Michael C

    Michael C Guest

    Of course! That explains it all :) Surface mounted power system, right? ;-)

  4. **Switch Mode Power Supply. Same thing as your computer power supply.
  5. Owen

    Owen Guest

    It probably does have a transformer, but it runs at a frequency of
    perhaps a thousand times that of a convential 50Hz transformer, so it
    can be made much smaller and lighter, even after allowing for the
    associated electronics for rectifying the mains and chopping it up at
    the higher frequency. Not only is it lighter, but it probably adapts
    to a wide range of mains supply voltages and frequencies.

  6. Mr.T

    Mr.T Guest

    Perhaps a bit smaller I think :)

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