I need to operate IRF540N. For this generating pulse from OPAL RT & then fed to IRF54N gate through IR2110. a square wave pulse is generated from pin 1 & 2 and that is fed to gate pin of mosfet. source pin of mosfet is connected to pin no 2 of IR2110. MOSFET drain is connected to a dc dc source of 5v where as dc sources -ve is connected to pin no 2. now as per pwm, in between drain & source terminal of mosfet a pulse of 5v magnitude will be seen but i found not pulsed wave. output i saw is like this. can anyone tell how should i get pulsed output from mosfet

 

Welcome to AAC!

It's better to post a schematic rather than a wall of text describing how things are connected. Where is the picture of the output you saw?

 

This is the output i saw & its not constant it is moving up & down

 

This is the output i saw & its not constant it is moving up & down

Where is the output from (schematic please) and what does the PWM input look like? You mention a 5V supply, but the signal swing appears to be about 250mV. Is the scope probe 10X?

Unless the duty cycle is 100%, you'd expect some sort of rectangular wave output.

 

I have configured the IR2110 driver such that input pulses from the OPAL-RT system are applied to pins 12 and 10. At pin 1 of the driver, I am able to observe square pulses as expected.

However, when this output is used to drive the IRF540N MOSFET, the voltage across the drain-to-source terminals does not exhibit the expected clean pulsed waveform. Instead, the output waveform appears distorted, as shown in the attached observation.

 

when this output is used to drive the IRF540N MOSFET, the voltage across the drain-to-source terminals does not exhibit the expected clean pulsed waveform.

Without a schematic of your system we have no knowledge of what else is connected to the driver chip or to the FET which might affect its performance.
If you want help from us, please help us by answering our questions/requests.

 

There is no indication of the frequency of the signals anywhere in your text or on the oscilloscope.

 

Please show the complete circuit including the MOSFETs and indicate where you are measuring the input and output signals.

 

You must have an output load to get any meaningful output trace,either balanced as below, or capacitively coupled to ground..