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  1. #21
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    Re: [moved] problem with IR2118 mosfet driver in PSPICE.

    Thank you for guidance. according to your said I connect this simple circuit with IR2113 driver. but the HO gate is always '0'.
    Click image for larger version. 

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  2. #22
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    Re: [moved] problem with IR2118 mosfet driver in PSPICE.

    Hi,

    It seems you use 16V as VDD,
    but I can´t see what is the HIN and LIN input voltage level.

    According datasheet you need at least 0.62 x Vdd which is about 10V.
    See: Figure 12B. Logic “1” Input Threshold vs. Voltage
    and: Figure 13B. Logic “0” Input Threshold vs. Voltage

    I recommend to use the same voltage for logic supply (VDD) as for logic signals (HIN, LIN):
    16V supply and 16V signals
    or 3.3V supply and 3.3V signal...

    Klaus



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  3. #23
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    Re: [moved] problem with IR2118 mosfet driver in PSPICE.

    I did your said. but the PSPICE give me a error.
    How it is possible that the power supply of driver and signal (pwm voltage) could be equal?!



  4. #24
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    Re: [moved] problem with IR2118 mosfet driver in PSPICE.

    Hi,

    but the PSPICE give me a error.
    ... is not very descriptive.

    How it is possible that the power supply of driver and signal (pwm voltage) could be equal?!
    Why not? It´s quite usual for CMOS logic that the signal levels are almost equal to supply rails.

    Klaus



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  5. #25
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    Re: [moved] problem with IR2118 mosfet driver in PSPICE.

    in my design the PWM voltage is 3.1 volt. how I can use IR2113 to drive single mosfet?
    I insert this circuit and it works. but the PWM signal is 9 volt.

    Click image for larger version. 

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  6. #26
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    Re: [moved] problem with IR2118 mosfet driver in PSPICE.

    Hi,

    I am wondering what you want to do.

    If you have a 9V PWM signal as input for the IR2113...
    Why don't you drive the FET with this signal?

    Why do you use 10k as series resistor to the gate?

    Where do you get the 3.1V from?

    Klaus



  7. #27
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    Re: [moved] problem with IR2118 mosfet driver in PSPICE.

    PWM is come out from FPGA and is 3.1 volt(I haven't PWM 9 volt).
    Just in the PSPICE PWM is 9 volt.



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    Re: [moved] problem with IR2118 mosfet driver in PSPICE.

    Hi,

    Try this:
    * VDD = 3.3V
    * VCC still is 12V
    * input PWM is 0V / 3.1V

    Klaus


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  9. #29
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    Re: [moved] problem with IR2118 mosfet driver in PSPICE.

    YES.
    IT WORK.
    Many thanks. Now I want to simulate it with Bootstrap.



  10. #30
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    Re: [moved] problem with IR2118 mosfet driver in PSPICE.

    FYI
    I changed the driver and want to use TC4426. I simulated it in PSPICE and the result of simulation was OK.
    I want to implement it on the board.
    my circuit is:
    Click image for larger version. 

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  11. #31
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    Re: [moved] problem with IR2118 mosfet driver in PSPICE.

    Hi,

    Did you recognize how often you changed your circuit?
    From high side to low side switching.. different driver circuits..

    Now you changed from N-cannel to P-channel....which makes controlling a high side current much easier.
    If you told this earlier, it didn't need 30 posts to get a solution.

    Klaus



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  12. #32
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    Re: [moved] problem with IR2118 mosfet driver in PSPICE.

    OK
    I recognize This driver by my friend.



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