Do mosfets ... operate like a transister
MOSFETS are like transistors
Not to be too picky, but mosfets are transistors
So what value in the datasheet shows the voltage that needs to be applied to the gate in order to turn the mosfet completely ON?
That capacitance stuff matters mostly when you are going to use a very high PWM frequency - like megahertz.It's less important at lower frequencies typically used for driving robot motors and that the arduino can practically generate.
And to drive them nice and cleanly with these UCC27424P MOSFET driversThe drivers are high speed dual drivers with a paralleled MOSFET and bipolar transistor complimentary output for good sourcing and sinking of main power MOSFET gate charge.
well.. I'm not using the mosfets to drive 24 volt robot motors.. I'm using them for a load at 100v - 150v at 10amps. So I need the bigger mosfets.
I am thinking of driving the mosfet gate using a push-pull setup with npn pnp BJT transistors.. This way the arduino can trigger the transistors, which can provide a high current to the mosfet gate, allowing for fast gate charge / discharge of the mosfet.
I am trying to find a 3 or 4 amp transistor that the arduino can turn on.. and from what I'm reading, the arduino can only provide about 5 volts @ 20mA to do this..
I was looking at the MJE243 MJE253 npn pnp transistor set.. but I'm not sure the arduino can provide enough current to completely turn it ON.. Here's the datasheet stats for those transistors:Collector−Emitter Saturation Voltage = 0.3v , 0.6v(IC= 500 mAdc, IB= 50 mAdc)(IC= 1.0 Adc, IB= 100 mAdc)Base−Emitter Saturation Voltage = 1.8V(IC= 2.0 Adc, IB= 200 mAdc)Base−Emitter On Voltage = 1.5V(IC= 500 mAdc, VCE= 1.0 Vdc)From this information.. what is the current required to fully turn this transistor on?