I'm looking to switch a 12v 1-2A load of a light using a MOSFET and an Arduino. Could you tell me how this MOSFET looks to you please. The datasheet gives a gate threshold of 1.0-2.0V, this means that it will start to turn on in between 1-2V, right? The Static Drain-to-Source On-Resistance is showing the below:
This means that if i feed the gate 4V, then 21A will go through, right?
Figure 1 on the datasheet shows the Typical Output Characteristics, am i correct in saying that if the drain-source voltage is 12V and i give the gate 2.5V, then i should be able to pass around 3A through?
The Arduino will be using 3.3V to turn the MOSFET through a PWM pin. If the MOSFET itself looks fine, which i doubt, (if the 3.3v turns it on enough/saturates it properly) then i do understand that i will need a heatsink as the ambient will be around 25, the max temp it can reach is 175. 175-25=150. It has a rating of 62 degrees/W meaning it can handle 2.419W at best, with the load of 12v and up to 2A it will be handling around the 24W mark. It has a Junction-t-case value of 1.4 degrees/W, lets call it 1 to make it simpler. 150 rise is allowed and that will allow 150W dissipation, am i correct in thinking this?
This means that if i feed the gate 4V, then 21A will go through, right?
Figure 1 on the datasheet shows the Typical Output Characteristics, am i correct in saying that if the drain-source voltage is 12V and i give the gate 2.5V, then i should be able to pass around 3A through?
The Arduino will be using 3.3V to turn the MOSFET through a PWM pin. If the MOSFET itself looks fine, which i doubt, (if the 3.3v turns it on enough/saturates it properly) then i do understand that i will need a heatsink as the ambient will be around 25, the max temp it can reach is 175. 175-25=150. It has a rating of 62 degrees/W meaning it can handle 2.419W at best, with the load of 12v and up to 2A it will be handling around the 24W mark. It has a Junction-t-case value of 1.4 degrees/W, lets call it 1 to make it simpler. 150 rise is allowed and that will allow 150W dissipation, am i correct in thinking this?