Re: LEDs Switching
When looking for FETs in digikey.com, I saw there is an option "Rds On (Max) @ Id, Vgs". For example: 12mOhm, 11A, 4.5V. How do you interpret this option?
What I understand is: Vds=Rds*Id=12mOhm * 11A =0.132V
At the V-I curve of FET, the curve will "bend" at 0.132V (Vds) which is at 4.5V (Vgs). If I lower the curve to 3.3V (Vgs), there will be no difference (cause the curve is so steep). That also means, if I apply 3.3V to Vgs, the FET will move to saturation region (turn on) almost immediately, and if I apply 0V to Vgs, it will turn off completely.
Am I right?
P/S: The picture below is for symbolic only, the curve will much steeper near Id-axis.