With 3.3v at the gate & 12v at the drain, how many milliAmpere can i let flow trough this mosfet keeping it at a resonable temperature?
What is a resonable temperature ?
40,60,80 or more °C
I just salvaged 3 IRLL3303 n-type mosfets. And a friend asked me if i could make him a rgb led lamp (for free). I'm trying to figrue out how many amperes i could let flow trough those mosfets but also keeping a low temperature.
- i'm using a 3.3v mcu.
- the volatage for the led strips is 12v.
- everything should kept at a resonable temperature even in summer (max 37°C room temp).
I tried different calculations from various sites but i always get different values and most of the time i can't find all the variables needed in the datasheet.
I linked the datasheet but here is the important stuff:
RDS(on) 0.045Ω (VGS = 4.5V, ID = 2.3A) but i use 3.3v on the gate.
Power Dissipation (PCB Mount) 1.0 W
Linear Derating Factor (PCB Mount) 8.3 mW/°C
Junction and Storage Temperature Range -55 to + 150 °C
Junction-to-Amb. (PCB Mount, steady state) normal=93°C/W max=120°C/W