Zener Regulator

Discussion in 'Homework Help' started by jegues, Apr 21, 2011.

  1. jegues

    Thread Starter Well-Known Member

    Sep 13, 2010
    The only question I have with regards to this design question was the selection of R.

    In the solution provided, they chose to determine the value of IL based on Vo and then choose an approriate value for I such that Iz > Izk.

    As you can see from my work I did none such thing and just simply let I be 12mA.

    Is there any problems with that? As a result my R value came out different but that's okay right?

    Edit: Note in the figure there is only a portion of my solution.
  2. designnut


    Apr 21, 2011
    The source resistor is chossen so that at maximum currennt into the load there is still some residual current in the zener, say 5 ma.