Power Supply design

Discussion in 'The Projects Forum' started by satya369, Apr 17, 2011.

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  1. satya369

    Thread Starter New Member

    Dec 14, 2009
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    Hi,
    I am working on a project which requires power supply of +/-60V DC. I found a positive voltage regulator(TL783) which can work for this high DC voltage. But, I found it difficult in searching for a negative voltage linear regulator. If you guys have any suggestions of creating a negative voltage supply of this range or if you know any linear voltage regulator this can provide me this range please help me. By the way my project requires a power supply which can supply currents up to 0.3A.

    I also though of a circuit which can be used to generate +/-60V volts from a single 120V supply using a opamp and some resistors. But this requires a regulator with a positive and negative terminals. I have attached that circuit to this feed. Can you suggest any such voltage regulator.

    Thank you,
    Regards
    satya.
     
    Last edited: Apr 17, 2011
  2. beenthere

    Retired Moderator

    Apr 20, 2004
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    Any circuit that attaches directly to the mains is a lethal shock hazard. You must find a transformer to give galvanic isolation from the line. A transformer with a center tapped secondary of about 90 volts will give DC voltages high enough to regulate down to +/- 60 VDC.
     
  3. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    Satya....who gave u tht diagram?
     
  4. satya369

    Thread Starter New Member

    Dec 14, 2009
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    thank you.. for the suggestion. I am planing to implement voltage regulator only after rectifying AC voltage and passing it through the capacitors to get DC voltage with ripple content.

    To decrease this ripple content and to keep the voltage stable I am planning to use linear voltage regulator. I need help in this regard to find a negative voltage regulator which can be used.

    Bye the way I found the circuit on a video in EEVblog in YouTube. Which uses one battery source to produce positive as well as negative voltages.
     
  5. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    Any idea on ur load current?
     
  6. satya369

    Thread Starter New Member

    Dec 14, 2009
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    My circuit consists of opamps, filters and a piezo displacement device. Expecting total load current up to 200-300mA
     
  7. beenthere

    Retired Moderator

    Apr 20, 2004
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    As long as you insist this be directly tied to the line, we can't support the project.
     
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