Triggering a mosfet with Proteus

[pabloncho]

I've been testing the circuit and the problem continues, even with the resistor....uU

 

[DerStrom8]

pabloncho , did you see AG's post?

The load is only 1 ohm and the Mosfet is an old one. When the Mosfet switches then the voltage boost will not be much.

At least change the load resistance.

 

[pabloncho]

I also traied that DerStrom8 .... changing the resistance, and putting resistors after de inductance and between the transistor and the ground.

 

[alec_t]

Try giving your voltage source that drives the gate a finite resistance (say 1Ω), or include a low value resistor in series with the gate.

boost 1.2V - 5V to 12Vout, 100W out

That may work in a sim, but is likely to cook a 1.2V battery in practice .

 

[kubeek]

If you need to run from as low as 1.2V, then you need a mosfet that can switch with such low gate voltage, and there arent many and even less with high enough current, so bjt might be a better choice here.