Hello Everyone,
I have problem with IR2181 that runs in my motor controller.
On my microcontroller I set 4us deadTime ( PWM period is 50us).
Problem is with signal that goes to high-side fet gate from IR2181.
I have checked that with scope ( BLUE - microcontroller signal ( there is also logic buffer but signal there is identical), RED - highside fet gate):
Red signal "steps" are fluctuating and I also observe correct signal:
I do not know what is causing that high-side gate signal to fluctuate. I would like to know how to get rid off it, because it is causing short circuit:
Like here ( BLUE - low-side gate signal , RED - highside fet gate):
Has anyone knows how to eliminate that problem?
Best regards,
Chris
I have problem with IR2181 that runs in my motor controller.
On my microcontroller I set 4us deadTime ( PWM period is 50us).
Problem is with signal that goes to high-side fet gate from IR2181.
I have checked that with scope ( BLUE - microcontroller signal ( there is also logic buffer but signal there is identical), RED - highside fet gate):
Red signal "steps" are fluctuating and I also observe correct signal:
I do not know what is causing that high-side gate signal to fluctuate. I would like to know how to get rid off it, because it is causing short circuit:
Like here ( BLUE - low-side gate signal , RED - highside fet gate):
Has anyone knows how to eliminate that problem?
Best regards,
Chris