N channel MOSFET not working properly

Discussion in 'Power Electronics' started by zazas321, Jun 14, 2019.

  1. crutschow

    Expert

    Mar 14, 2008
    22,220
    6,477
    Q2's source should be directly connected to the 12V supply (no lamp there).

    When S1 is closed, Q2 turns on, pulling Q1's gate voltage to ground.
    This turns on Q1 and energizes the lamp connected between Q2's drain and ground.
     
  2. Jony130

    AAC Fanatic!

    Feb 17, 2009
    4,868
    1,364
    To model a real power MOSFET like an IRF530 you need to change the N MOSFET specification in your simulation.
    Try VTO = 4V and what is more important set Kp at Kp = 4 A/V^2
     
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