I am obtaining weird voltage behaviour at the gate of my high side mosfet controlled by IR2110 which is controlled by PWM.
- Vinitial = 0
- Von = 5v
- Tdelay = 0
- Trise = 7u
- Tfall = 7u
- Ton = 150u
- Tperiod = 200u
For the simulation I use TRTOL = 7 and I am using the "Alternate" solver otherwise timestep is too small.
Here are the schematic and the simulation results: Larger picture: https://i.stack.imgur.com/npxEB.png
Larger picture: https://i.stack.imgur.com/1CNqv.png
The green result corresponds to the mosfet gate voltage and the blue one corresponds to PWM. As you see the gate voltage acts very weirdly.
Is this a simulation problem or would this happen in real life ?
EDIT: I just reduced the load resistance to 10R and gate voltage behaves correctly in 100ms simulation. Seems that is has something to do with the current flowing through the mosfet ... When the current is higher it works better and correctly.