self regulating power supply

Discussion in 'General Electronics Chat' started by lokeycmos, Dec 25, 2010.

  1. lokeycmos

    Thread Starter Active Member

    Apr 3, 2009
    432
    7
    can someone please explain to me how a self regulating power supply works? the reason im asking is because i got a hold of a 24 volt 10 amp self regulating power supply. ive built a couple power supplies in the past and they had power transistors in them. this has a circuit board with the electronics. this had NO transistors in it(other than to-92 trannys on the circuit board). i have a couple pics. TY
     
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  2. Kermit2

    AAC Fanatic!

    Feb 5, 2010
    3,795
    951
    Is one of those IC's a '723'?
     
  3. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    That's a battery charger, not a power supply.
    I count seven ICs on the main board. What are the numbers on the ICs?
    What are the numbers on the TO-92 devices? I'm betting that they are SCRs or Triacs.
     
  4. lokeycmos

    Thread Starter Active Member

    Apr 3, 2009
    432
    7
    no none of them are the lm723. that is the ic i used in
    another lab power supply.

    the ic #:

    tc4040bp
    tc4043bp
    tc4001bp
    tc4020bp
    ua741cn
    mc14093bcp fnt9439
    mc14584bcp fic9430

    2n3906

    cant read the other 2 transistors

    sgtWookie, is there a difference between a 24 volt regulated charger and a fixed regulated 24 volt supply? please elaborate ty :)
     
  5. timrobbins

    Active Member

    Aug 29, 2009
    318
    16
    The transformer construction and cap indicate it is a ferroresonant type regulating output circuit. If you google on that then you should get a better understanding of its principal operation mode.
     
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