FET (TOSHIBA 2SK941) SWITCHING

[Turbo46]

Hi<p>Im currently having a switching problem. Im applying 5V to the gate of this fet and the driven circuit works correctly, but when the gate is switched off, the micro which is driving the gate does not go completely to zero and therefore the switching circuit stays on slighty (0.007v).<p>I have tried putting a 1N4001 diode in series with the gate and the mirco and this doesnt work. Also i have tried putting a 10k resistor from the gate to the source(0V) and this also does not work. Any ideas?<p>Cheers

[Chris Smith]

You may need to drive it slightly below ground to shut the gate, a neg number. Fet drivers are used often for many FETS that have tricky characteristics and need the gate voltage to float or be controlled independently from the driving or source voltages.