QuoteI would never try to use 5 volt gate drive for a standard power mosfet.That will depend on the current you are trying to switch, among others.
I would never try to use 5 volt gate drive for a standard power mosfet.
I want to be able to force it on as fully as possible (minimum Ron) to make the device dissapation (heat) as small as possible.
But it doesn't mean you will always need to drive the switching device to the maximum allowable Vbe or Vgs
Yes it does if you want to do a proper design and minimise component heating.
QuoteYes it does if you want to do a proper design and minimise component heating.Why do you always want to minimize component heating?
Arduino digital pin 2, ground, 5V pins are connected to this mosfet module : http://tinkerkit.com/en/Modules/T010020
Module Description: This module features an IRF520 power MOSFET transistor, a kick-back diode, a standard TinkerKit 3pin connector,a signal amplifier, a green LED that signals that the module is correctly powered and one yellow LED whose brightness depends on the input signal received by the module.
Most times, "amplifier" is an analog concept
you are simply switching too much current in this case
Did you measure Vgs while the mosfet was on?add: that is the voltage from the gate pin to the source pin (ground) on the mosfet.
I presume the voltages you posted were supply voltage and voltage across the load. I can get the Vds from those.14.8 - 14.3 = 0.5vThat is much higher than it should be at full on. That will generate some heat, even at 5 amps.
The circuit works, the problem is that the mosfet it's overheating.What do you think it's the problem? I think it could be the fact that im using 15 v instead or 12 v, or maybe could be an inrush of current in switching on the load ?