12Vdc 2a Transformerless Power Supply

Discussion in 'General Electronics Chat' started by aq_rules, May 24, 2010.

Thread Status:
Not open for further replies.
  1. aq_rules

    Thread Starter Member

    Oct 28, 2009
    168
    0
    I searched this 12VDC 2a transformerless power supply,but i was unable to find it...
    i found 12vdc 20a supply..
    plz post a schematic if possible for 12v 2a supply...
     
  2. kkazem

    Active Member

    Jul 23, 2009
    160
    26
    Hi,
    I'd be glad to help you, but your specs are too vague for me to answer you. Here is some basic information I would need to help you:
    --Input Voltage level and whether AC or DC.
    --Available input current
    --Maximum allowable ripple
    --Maximum allowable line and load regulation
    I think you are looking for a DC-DC converter, but I need you to confirm that information before I spend my time helping you. Also, tell me what the power supply load is (what will it be powering?).
    When you reply with that, I'll answer you with details.

    Regards,
    Kamran Kazem
     
  3. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,536
    If you are talking about trying to make a power supply connected to power mains without a transformer, well, I expect this thread to be closed shortly. There is no safe way to make a power supply without using a transformer.

    Personally I recommend a wall wart.
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    A DC - DC converter is one thing; a transformerless supply operated from the mains is another. Can the OP clarify?
     
  5. aq_rules

    Thread Starter Member

    Oct 28, 2009
    168
    0
    yea....it will be connected to 220VAc Mains...
     
  6. bertus

    Administrator

    Apr 5, 2008
    15,647
    2,346
    Hello,

    A powersupply without a transformer WILL NOT BE SAFE.
    The use of a transformer is a MUST.
    There are circuits as SMPS that are small, but still use a transformer.

    Bertus
     
Loading...
Thread Status:
Not open for further replies.