Hi everyone,
I want to drive an IGBT with TLP250 optocoupler. The schematic of my circuit is attached. I use the output of signal generator as input of the TLP and a potentiometer between output of TLP and Gate of IGBT. The problem is, there is spike at rising edge of PWM signal on load. this issue gets better when I increase the gate resistance, but the time constant is increased in this case and its not good for me. I have attached some pics from oscilloscope. (blue color is output of TLP and yellow one is load voltage). How can I remove these spikes?
Any help is really appreciated.
Saeed
I want to drive an IGBT with TLP250 optocoupler. The schematic of my circuit is attached. I use the output of signal generator as input of the TLP and a potentiometer between output of TLP and Gate of IGBT. The problem is, there is spike at rising edge of PWM signal on load. this issue gets better when I increase the gate resistance, but the time constant is increased in this case and its not good for me. I have attached some pics from oscilloscope. (blue color is output of TLP and yellow one is load voltage). How can I remove these spikes?
Any help is really appreciated.
Saeed
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