thannara123
Advanced Member level 5
You are still missing a basic understanding of MOSFET operation.
To get a better idea, you can use the post #9 simulation circuit and perform a dc sweep as shown below. Determine for which Id and Vds range the transistor is in cutoff, saturation and ohmic mode. You'll find that a transistor switch is only temporarily in saturation, you want to avoid this operation due to high power dissipation.
View attachment 157373
Sir,
Now cleared the doubts learned charactrestics lot of . And I Concluded that the desgin as follows .
VDD =12Volt
Vgs = 5volt (at maximum current 1.69ampere when the ohmic region then the Vgs volt is 2.9v . there2.1volt drops)
Vds@ON =Vout = 145mv.