DC/DC Converter

Discussion in 'General Electronics Chat' started by JazzRei, Jan 25, 2011.

  1. JazzRei

    Thread Starter New Member

    Jan 25, 2011

    I'm designing a Buck/Boost Converter. I'm searching for an inductor that support input voltage of 5V and 2A.. to produce output range 1V to 15V.

    I'm looking for inductor value of 1mH. Is it I need an inductor to support current more than 2A? Where can I get the inductor?
  2. JDT

    Well-Known Member

    Feb 12, 2009
    How did you calculate this? Higher inductance value than I would expect. The inductor needs to have a low DC resistance. For an inductor of this value and 2A it is going to be a BIG item.

    I suggest raising the operating frequency. A value of inductance in the range 47μH to 150μH would be expected. You can get off-the-shelf toroidal inductors of this size rated 3A or more.

    If you look at data sheets for switching I.C.s they often have formulas and example circuits.
  3. SgtWookie


    Jul 17, 2007
    a 50uH inductor would be about right for a 100kHz drive circuit.
    The lower in frequency you go, the larger the inductance you need. Large inductors rated for even moderate current get rather expensive rather quickly.