Transistor Polarity N Channel
Continuous Drain Current Id 5.8A
Drain Source Voltage Vds 30V
On Resistance Rds(on) 0.03ohm
Rds(on) Test Voltage Vgs 10V
Threshold Voltage Vgs 1.2V
Power Dissipation Pd 2.1W
Transistor Case Style SOT-23
No. of Pins 3
Operating Temperature Max 150°C
I have calculated the temperature rise for this would be: 14.4°C
I x I x R = W
2 x 2 x 0.036 = 0.144W
Junction-to-Ambient thermal resistance = 100°C/W
0.144 * 100 = 14.4°C
LEDs are non-inductive, so cannot generate excess voltages in themselves. As long as you can trust your 24 V power supply to be just that and no more, it will be fine.
davivid:
How would you know whether to trust your power supply? I am using higher end(?) PSUs
Presumably just fine. Merely pointing out that you actually want to be using a regulated power supply.
davivid:
Would I want to add any additional protection?
Proper switchmode supplies include a "crowbar" circuit to short out and shut down the supply with a thyristor if there is an internal failure and the output voltage rises above a reasonable level. Not all however are properly engineered.
CrossRoads:
Calculations are off:
Rds = 0.042 at VGS = 4.5 V
Thanks for pointing that out... I have been making that mistake in all of my calcs.
Paul__B: Proper switchmode supplies include a "crowbar" circuit to short out and shut down the supply with a thyristor if there is an internal failure and the output voltage rises above a reasonable level. Not all however are properly engineered.