[moved] problem with IR2118 mosfet driver in PSPICE.

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

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
 

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?!
 

Hi,

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

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

Klaus
 

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.

 

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
 

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.
 

Hi,

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

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

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:
 

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
 

OK
I recognize This driver by my friend.
 

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