Isolate DC

Discussion in 'The Projects Forum' started by rene.qvist, Aug 4, 2013.

  1. rene.qvist

    Thread Starter New Member

    Aug 1, 2013
    5
    0
    Is it possible to split one dc power source into 2 isolated power sources?


    Reason im asking is because I have a sound system that requires 18+ and 18- @ 1A and instead of using 2 regular power supplies to do this, i was wondering if it was possible to split a single source into 2 isolated ones...




    Thanks in advance
     
  2. MrChips

    Moderator

    Oct 2, 2009
    12,439
    3,360
    They do not need to be isolated.
    Yes, you can create a split DC power supply from a single DC supply.
    What is the voltage and current rating of your DC supply?
     
  3. rene.qvist

    Thread Starter New Member

    Aug 1, 2013
    5
    0
    The current is 18 V 1A from the powersupply

    My sound system needs

    0v
    18V
    &
    0v
    -18V
     
  4. crutschow

    Expert

    Mar 14, 2008
    13,001
    3,229
    Splitting the supply into ±18V will half the current so you will only have 0.5A available for each voltage. You need another 1A power supply.
     
  5. rene.qvist

    Thread Starter New Member

    Aug 1, 2013
    5
    0
    My mistake in Info, I do have a 2 amp I want to split into two
     
  6. MrChips

    Moderator

    Oct 2, 2009
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    Good. Then you need a 18VDC to -18VDC converter.

    LM78S40 is shows one example of how to do this.
     
  7. MrChips

    Moderator

    Oct 2, 2009
    12,439
    3,360
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