I'm making a project to school about MOSFET transistor. But I have a problem, which refers to turning on those transistors. The problem is, drain current starts rising only when Uds fell to zero. Instead of looking like that:
It looks like that:
Second picture is waveform, which I made from oscilloscope data. It's a low side switch with resistive load. I need to designate switching times and calculate power losses, but i don't know how to define turning on time and what current should I take to my equation. I was searching about this problem, but always saw pictures similar to the first one.
EDIT: Ok, I read a little bit and now I understand how to define switching times and calculate power losses, so you can close this topic. And I wanna thank you guys for help and show me a way to understand that :)