Design a 4A 48V DC Charger with monitoring system

Discussion in 'The Projects Forum' started by seanbein, Sep 5, 2011.

  1. seanbein

    Thread Starter New Member

    Mar 16, 2010
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    I am required to design a circuit with ability to convert 100-240vrms, 50/60Hz to DC 48v, 4A OUTPUT with isolated dc-dc converter.I would like to know if there is any suggestion of reading materials for this project?
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    759
    Yup...
    Try google.
     
  3. entgineer

    New Member

    Sep 19, 2011
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    Funny enough I just Googled "48V DC Charger" and this was one of the results...

    What's needed beyond a rectifier?
     
  4. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    After a rectifier comes the capacitor.
     
  5. capnray

    Member

    Jul 3, 2010
    59
    2
    No clue here on reading material. You have a large input range and I'm guessing that a mere switch is not in the program. This says that you need a switching power supply or as many are called "universal". Unless you are required to build from scratch, I'd do the "quick and dirty", select a universal power supply with enough "headroom" at the output to allow charging current regulation and design a linear regulator to control the charge rate. If you haven't already done it, you need to evaluate the battery to be charged. If it is lead/acid, full charge is 2.2V/cell, however the charging voltage is a bit higher. As an example, the automotive alternator output is 13.9V .

    I hope this helps, comes from too many years in automotive engineering.
     
  6. vrainom

    Member

    Sep 8, 2011
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