Ive found lots of fets that will probalby be suitable, trying to pick one is hard.
Ive found this one DMN2112SN
its 100mOhm, 1/2watt 1.2a
My needs are:
16x3x20=960ma=.96a
THis is my dissipation calculations.
.96x.96 =0.9216 x .1= .09216, or 96mw, or about 1/10th watt, so well within 1/2 watt.
this is from the digikey website:
FET Type MOSFET N-Channel, Metal Oxide
FET Feature Logic Level Gate
Drain to Source Voltage (Vdss) 20V
Current - Continuous Drain (Id) @ 25° C 1.2A
Rds On (Max) @ Id, Vgs 100 mOhm @ 500mA, 4.5V
Vgs(th) (Max) @ Id 1.2V @ 1mA
Gate Charge (Qg) @ Vgs -
Input Capacitance (Ciss) @ Vds 220pF @ 10V
Power - Max 500mW
Full datasheet.
http://www.diodes.com/datasheets/ds30830.pdf
Does that seem like a good part for what im doing? I dont want to buy any more parts that are not what i need.