IGBT and MOSFET

Discussion in 'General Electronics Chat' started by Surendar, Feb 14, 2006.

  1. Surendar

    Thread Starter Member

    Sep 12, 2005
    18
    0
    Could anyone explain the differences between IGBT and MOSFET.


    Thank You

    Surendar
     
  2. n9xv

    Senior Member

    Jan 18, 2005
    329
    1
    IGBT stands for Isolated Gate Bipoar Transistor. Its a bipolar transistor with an isolated gate for the control input. In other words its a voltage controlled bipolar transistor. Whereas bipolar transistors are normally current controlled. With IGBTs, a simple input (low level voltage, logic level etc) can be used to controll extreemly large amounts of current. You find IGBTs in large motor controll and switching supply applications. MOSFETs can perform similar tasks but at the higher currents as IGBTs. MOSFETs are more common in RF power devices where a much higher switching speed is necessary. In really high current applications, the IGBTs can be as big as a brick!
     
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