De nuevo aqui con otra consulta. El tema es el siguiente, mediante un mosfet de nivel logico necesito activar la compuerta, logicamente con 5v y que por drain y source debe circular tambien 5v y algunos mA, esto es posible?, porque por lo general los mosfet de nivel logicos que veo activan puerta con 5v y entre drain y source circula 10v o mas, y yo solo necesito circular la cantidad que menciono arriba, ahi pongo una imagen para ilustrar un poco mas mi pregunta.
O acaso si tengo un mosfer que en la hoja de datos dice que abre puerta con 5v y que por drain y source circula 10v, y yo en ves de pasar por drain y source los 10v le pongo una carga solo de 5v, pasan los 5v con su respectivo mA, digo mA porque solo necesito pasarle uno poco de mA.
In general, the MOSFET works as a switch, the MOSFET controls the voltage and current flow between the source and drain. The working of the MOSFET depends on the MOS capacitor, which is the semiconductor surface below the oxide layers between the source and drain terminal. The input charge is entered via the Gate / Source. Yes it needs current to charge and discharge the gate but not to conduct. You can pump amps into the gate circuit turning it on or off, this is dependent on the gate capacitance and the rise/fall time of the input signal. Once enhanced the source drain act as a low resistance resistor. unlike a resistor it has a maximum voltage rating but not a minimum one, polarity excepted. When off it is in the high resistance range.
Yes you can put 5V on the gate (assuming the source is at ground) and the drain will allow current to flow for any voltage on the drain from 0 to the maximum the MosFet is rated for.
(of course no current will flow with 0 volts on the drain, but there is no lower drain voltage limit on the MosFet.