aus.electronics

P mosfet


G'Day All,

I'm trying to use a P type mosfet (IRF 9540) as a PWM switch to charge a 

battery.

I cant get it to turn on completely, as a test I have connected the + 

supply to the source and the drain to the + of the battery and the neg 

of the battery to the neg of the supply. If I take the gate to the neg

it does not turn on completely, there is a volt drop of several volts 

across it at 2 amps. This happens with the 2 devices I've tried. They 

turn off OK when the gate is held high.

What am I missing here ???

Cheers ....... Rheilly



Written by Rheilly Phoull 20/10/2011 7.34.50
Check some pics on this site!
23/05/2012 5.56.55