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HCPL-3120, IGBT driver circuit,

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I have designed a driver circuit using HCPL-3120.
i think i am getting the output pulses but i am not able to vary the voltage and the pulse width of the output pulses.
i am attaching the circuit dig., output voltage and input voltage...
if anyone has any idea please reply....
 

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Hi nup,

To vary pusle width at the output you will need to vary the pulse width at V7 source. Currently you have configured V7 to give you 50% duty cycle.
Duty Cycle = PW/PER * 100

and to vary output voltage you will need to adjust output voltages of V8 in your designed circuits.
 

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