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DC-DC Step-Up circuit

Discussion in 'Electronic Design' started by Ryan Faerman, Jul 11, 2007.

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  1. Ryan Faerman

    Ryan Faerman Guest

    I am trying to design a circuit that will take ~12v from my car's
    electrical system, and step it up to around 24v for a 12" powerbook. I
    need between 3 and 4 amps of current.

    I'd like to be able to have the power supply have some sort of delayed
    shutdown (by a few seconds).

    I barely know where to start.
     
  2. Joel Kolstad

    Joel Kolstad Guest

    In that case, you might consider an off-the-shelf solution such as:
    http://www.igo.com/product.asp?sku=3541433

    iGo's main competition is from Targus:
    http://www.targus.com/us/powerstore.asp -- their products also sometimes show
    up with the Kensington name on them.

    iGo and Targus both have "solutions" that can take in either 12V DC or
    120/240VAC (you just change power cords) -- this is quite convenient if you
    want to leave the existing power supply at home as a spare and just carry
    around one "brick."
     
  3. scada

    scada Guest

    Car inverter (12VDC-120VAC) 150W around $30-40...
     
  4. Joerg

    Joerg Guest

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