Role of Op-Amp in regulators-in-parallel circuit

Discussion in 'General Electronics Chat' started by exleonhart, Nov 19, 2008.

  1. exleonhart

    Thread Starter Member

    Nov 19, 2008
    10
    0
    As stated in the title. I dont understand the role of the LM308 Op-Am in the circuit. Someone enlighten me, please.
    Here is the circuit:
    [​IMG]

    [​IMG]
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    The LM308 is there to sense the output voltage, compare it with the reference voltage which is set by the 1.5K pot and give the appropriate signal to the LM338 as to maintain the output voltage constant and independent of the load.
     
  3. exleonhart

    Thread Starter Member

    Nov 19, 2008
    10
    0
    Hey thanks lots
     
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