Power supply design

Discussion in 'Embedded Systems and Microcontrollers' started by Tamilselvan, Nov 21, 2012.

  1. Tamilselvan

    Thread Starter New Member

    Apr 26, 2011
    Hello Everybody !

    I am developing a variable power supply which could deliver 1.25 to 125V dc using TL78c voltage regulator.

    I need to filter out the ripple after rectification, So pls help me to design the filtering part.

    I had done some numerical calculation and finally I decided to put 2200uF, 180V capacitor. Will it be sufficient or should I Increase capacitance ?

    My load current is 700mA.
  2. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    One would have no idea if the cap is sufficient as you have not posted any sort of schematic to define just how this cap would be used.

    But I would guess that cap gives you on the order of 3.2V of ripple.

    I would not guess about the voltage rating.

    Also, in what part of "Embedded Systems and Microcontrollers" does power supply design reside?
  3. spinnaker

    AAC Fanatic!

    Oct 29, 2009
    And 125 VDC! I hope your current is very low or you are setting yourself up for a nice funeral.