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How many amps needed for inverter @12v?

  • 13-02-2016 12:20PM
    #1
    euser1984
    Registered Users, Registered Users 2 Posts: 1,995 ✭✭✭


    It's a laptop CCFL screen - I got this kit http://www.ebay.ie/itm/111743845103?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

    It's a 12v input to the main lcd controller (which powers the inverter) - the max I can find in a charger here at the house is 2amp output @ 12v....

    I'm trying to figure out if I need more amperage or a possible problem with either the controller or inverter.....

    Thanks.


Comments

  • #2
    eeguy
    Closed Accounts Posts: 3,399 ✭✭✭eeguy


    euser1984 wrote: »
    It's a laptop CCFL screen - I got this kit http://www.ebay.ie/itm/111743845103?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

    It's a 12v input to the main lcd controller (which powers the inverter) - the max I can find in a charger here at the house is 2amp output @ 12v....

    I'm trying to figure out if I need more amperage or a possible problem with either the controller or inverter.....

    Thanks.

    Hard to tell. You can source a lot of current from a laptop battery.

    I've used 12v non laptop screens with a 5A PSU. If you have an old ATX computer power supply you could try that before springing for a proper PSU.

    Judging by this:
    http://electronics.stackexchange.com/questions/30541/lcd-led-panel-power-consumption (very non scientific)

    a CCFL is up around 60W, which suits the 5A guide.


  • #3
    euser1984
    Registered Users, Registered Users 2 Posts: 1,995 ✭✭✭euser1984


    ok thanks, out with the soldering iron so - I'll cut the connector off a laptop psu that has a amperage that's too low.


  • #4
    lostpas5235
    Registered Users, Registered Users 2 Posts: 35 ✭lostpas5235


    I am playing around with one of the moment. The kit is hooked up to a very old Samsung screen taken from an Acer laptop that I purchased in 2002 or thereabouts.

    I am powering it from a modified ATX PSU and it is drawing a steady 1.2A at 12V.


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