I'm trying to make a high side driver circuit for my mosfet but am unable to get any output from the driver
A possible error might be that the model is not working but I do not know how to test weather the model is imported correctly in ltspice.
I I am also making a breadboard circuit of the driver and am giving it 50KHz pulses, how do I test this circuit without directly giving the signal to MOSFETs?
Will just looking at HO and VS in a scope work?
I have attached the simulation and model files

 

Hello,

The IRF530 is not the right mosfet for you.
It is a 100 volts 16 amp mosfet.
You will need a mosfet that can handle the higher current and higher voltage.

Bertus

 

You have probably killed the charge pump diode. A 1N914 is only rated at 100V.

 

Hello,

The IRF530 is not the right mosfet for you.
It is a 100 volts 16 amp mosfet.
You will need a mosfet that can handle the higher current and higher voltage.

Bertus

Thank you bertus for pointing that out, I have gone ahead and changed the mosfet to one thats suitable for the current ratings. However there is no improvement with the driver output. It continues to remain at 0V

 

You have probably killed the charge pump diode. A 1N914 is only rated at 100V.

Thank you ian, I have gone ahead and picked a diode thats more suitable for this circuit. Are there any other errors I might be missing as this change did not rectify the problem with the driver output being 0V.

 

Are there any other errors I might be missing as this change did not rectify the problem with the driver output being 0V.

Vin (Pulse voltage) needs to be at least 9.5V.

 

Vin (Pulse voltage) needs to be at least 9.5V.

Not true, see the data sheet.

 

Not true, see the data sheet.

Agreed, if the model conforms to the datasheet. If it doesn't, the model might be expecting logic High to be greater than Vdd/2. The TS could try increasing Vin to something greater then 10V (or else reducing Vdd to, say, 5V).

Edit: The above applies to the IRS21171, not the IRS2117. My bad.

 

Not true, see the data sheet.

Read the datasheet. The IR2117 model, at least the one I have, is complying with the datasheet. It expects Vin > 0.63 x Vcc whereas the datasheet says min. 9.5V for Vcc = 15 V. At Vin = 9.45 V (63% of Vcc) the model stops working. For some reason the OP is using Vcc=20V, which would raise min. Vin to at least 12.7 V. Again, at 63% of Vcc (Vin = 12.6 V), the driver model stops working.

 

Read the datasheet. The IR2117 model, at least the one I have, is complying with the datasheet. It expects Vin > 0.63 x Vcc whereas the datasheet says min. 9.5V for Vcc = 15 V. At Vin = 9.45 V (63% of Vcc) the model stops working. For some reason the OP is using Vcc=20V, which would raise min. Vin to at least 12.7 V. Again, at 63% of Vcc (Vin = 12.6 V), the driver model stops working.

I stand corrected that the input is not TTL compatible.
My interpretation is a minimum input of 9.5 volts regardless of Vcc and a max input equal to Vcc +.3 volt.

 

My interpretation is a minimum input of 9.5 volts regardless of Vcc

Very unlikely, considering that Vcc can be as low as 10V. Minimum Vin for a logic 1 is somewhere around 63% of Vcc:

 

Vin (Pulse voltage) needs to be at least 9.5V.

Thanks a lot, was able to get it to work.
I can't stress how much of a help this forum has been.

 

Thanks a lot, was able to get it to work.

Hi Nope,
Please post your working LTSpice asc file.
E

 

Your 20V supply is the max Vg-s of most MOSFETs. Be careful.

 

Hi Nope,
Please post your working LTSpice asc file.
E

 

Your 20V supply is the max Vg-s of most MOSFETs. Be careful.

Noted, thank you.