Identification component on PCB

Discussion in 'General Electronics Chat' started by guerrez, Sep 18, 2015.

  1. guerrez

    Thread Starter New Member

    Jan 26, 2012
    8
    0
    Hi all,

    I would like to know if you can recognize this component, it seems a transformer to me, it has in total 6 pin: 3 on one side and 3 on the other side. I am confused, because as far as I know, on the primary there should be only 2 pin...

    Here the pictures:

    upload_2015-9-18_7-56-31.png upload_2015-9-18_7-56-50.png


    Pinout:
    upload_2015-9-18_7-57-12.png



    Thank you for the support!

    guerrez
     
  2. KeepItSimpleStupid

    Well-Known Member

    Mar 4, 2014
    1,144
    203
    Center-tapped primary and secondaries are common.

    A good reason for a center tapped primary is in power production. The center tap is ties to a DC voltage and the ends are commutated to ground.

    3 taps for a primary can be used for 0 120 240, for instance. Dual primaries are also common.
     
    DerStrom8 and guerrez like this.
  3. guerrez

    Thread Starter New Member

    Jan 26, 2012
    8
    0
    Thank you for the fast answer, do you have some link references to theory on centered tap transformers on both primary and secondary? I cannot find anything online. Thank you,

    guerrez
     
  4. #12

    Expert

    Nov 30, 2010
    16,278
    6,791
    It's too simple for anybody to write, "The Theory of Why and How Transformers Have Taps at Different Points in a Winding". When you are designing or winding a transformer, you can add as many windings and taps as you want in order to make as many voltages as you want. Which ever taps YOU don't need, don't connect anything to them. Not connecting anything to a voltage tap you don't need has no effect on the rest of the transformer functions.
     
  5. KeepItSimpleStupid

    Well-Known Member

    Mar 4, 2014
    1,144
    203
  6. takao21203

    Distinguished Member

    Apr 28, 2012
    3,577
    463
    It's not a power circuits and probably some pins just dummy.
     
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