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Mosfet driver giving strange respond

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T3sl4co1l:
That is a normal DCM (discontinuous conduction mode) waveform.  Whether that was you intent behind the the L and Fsw values chosen, I don't know.

Tim

waytec:
Yes I agree too that the waveform is quite normal.......

When the FET is switched off the energy from that 200uH is reversed in polarity and has nowhere to go causing that bubble effect or bubble distortion...
As an experiment try changing the Duty Cycle and the bubble will also change and at one point of DC will all blend into the squarewave and look normal...

Thats all from me...



Wayne

FerdinS:
Thank you a lot my friend. I used a smaller resistor from driver to mosfet and it looks now there is no distortion anymore. Thank you a lot everyone. It solved my problems.

FerdinS:
Thank you a lot. I see now my boost converter works on discontinous mode mostly. I put output resisor low ( lower resistance ) and it come to continous mode.
Is there any other way I can do that ?
Maybe by changing frequency of PWM ?

Thank you for answers

FerdinS:
I tried with chaninging output resistance and it looks like there is also change from discontinous to continous mode of my boost converter.
Is there any other that you might know ?

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