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noob question,easy answer

Discussion in 'General Electronics Discussion' started by turbogt16v, May 19, 2015.

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  1. turbogt16v

    turbogt16v

    173
    4
    Mar 27, 2015
    Hy i just bought DC DC Converter Step Up Boost Module 3V To 5V 1A USB Charger For MP3 MP4 Phoneusb charger.
    specs are

    Module Properties: non-isolated step-up module (BOOST)
    input voltage: 2.5-6V
    Output voltage: 4-12 V(Adjustable, the default 5 v)
    Output Current: the maximum 1000mA
    Efficiency: Up to 92% (the higher the input voltage, the higher the efficiency)
    Switching frequency: 1MHz
    Output ripple: 20mV (MAX)
    Operating Temperature: Industrial (-40°c to +85°c)
    Voltage regulation: ± 2.5%
    Size:28*19*8mm(L*W*H)

    so my question is when i power some device with correct voltage but weigher amperage what would happen.
    if i power this device with 5v 3a would it burn
     
  2. davenn

    davenn Moderator

    13,557
    1,853
    Sep 5, 2009
    The device will only draw the current it needs

    you can put a device requiring 1 amp on a 20 amp power supply if you wish

    always ensure the voltage is the correct one

    Dave
     
  3. turbogt16v

    turbogt16v

    173
    4
    Mar 27, 2015
    thank you for swift answer,this has been bugging me a while
     
  4. davenn

    davenn Moderator

    13,557
    1,853
    Sep 5, 2009
    its an extremely common question on many forums

    usually because those asking the question haven't got around to learning the basics
    do some google searching on Ohms Law and how it relates to resistance, current and voltage :)

    Dave
     
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