I am attempting to design a powerful, yet efficient soft switching fullbridge converter. Achieving that requires high side switching with an N Channel MOSFET.
Now while I have succesfully achieved a drain to source voltage drop of but 0.2mV when a stable dc voltage is applied. However, when a switching signal of 100kHz is applied to the gate of the MOSFET, via a Darlington transistor (see diagram below), strange things start to happen. With strange things I mean:
This is my first attempt at high side switching with an N Channel MOSFET and I am completely lost on what I should do to fix this. Why is it not a pretty square wave like the signal? My guess is that the gate is charging too slow.
I hope someone can help me with this. Thanks in advance!