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Can current flow from source to drain in MOSFET?
MOSFETs have three pins, Source, Drain, and Gate. MOSFETs only switch current flowing in one direction; they have a diode between source and drain in the other direction (in other words, if the drain (on an N-channel device) falls below the voltage on the source, current will flow from the source to the drain).
Does current go from drain to source?
Yes, the current can flow from drain to source and vice-versa.
How do you calculate drain to source current?
- VGS=VG−VS is the voltage between the gate and source of the MOSFET,
- VDS=VD−VS is the voltage between the drain and the source of the MOSFET,
- VBS=VB−VS is the voltage between the bulk and the source of the MOSFET.
What does PMOS MOSFET do for reverse voltage protection?
PMOS MOSFET for Reverse Voltage Protection The field-effect transistor (FET) is a type of transistor that uses an electric field to control the flow of current through it. FETs are devices with three terminals that are source, gate, and drain.
Where does the current flow on a pMOSFET?
On a pMOSFET, the anode is at the drain, the cathode at the source. The opposite occurs on nMOSFET. Therefore, in your circuit, current will flow from drain to source, regardless if the pMOSFET is ON or OFF. To avoid this, you can use a back to back MOSFET connection shown below.
What is the body of a nMOSFET MOSFET?
The body in a pMOSFET is n-type, while the drain and source p-type. The opposite in in an nMOSFET. Discrete MOSFETs have the body and source terminal shorted together. This form a diode between source and drain. To see the direction of the diode, just have a look at the arrow in the symbol (in your schematics, the diode is also explicitly shown).
Can a MOSFET be used in the reverse direction?
MOSFETs used as near-perfect rectifiers are usually used in the reverse direction for conduction (so they can block in the other direction). Illustrates one example of switching AC with two MOSFETs (one of which will be conducting in reverse at any given time when the switches are on).