IRF Datasheet, IRF MOSFET N-Channel Transistor Datasheet, buy IRF Transistor. N-Channel V 9A (Tc) 75W (Tc) Through Hole TOAB. IRF STMicroelectronics MOSFET N-Ch Volt 10 Amp datasheet, inventory, & pricing.
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You say 1 Amp is not a heavy load, personally I would start worrying if the load irt630 close to the arduino board. The product does not contain any of the restricted substances in concentrations and applications banned by the Directive, and for components, the product is capable of being worked on at the higher temperatures required by lead—free irf63 The restricted substances and maximum allowed concentrations in the homogenous material are, by weight: Otherwise the current spikes ifr630 introduce problems at the arduino site.
Price Each In a Pack of 5. In option A the gate voltage would be a little less than 5V because of the potential divider formed by the two resistors. Thanks for your reply. Anyway, speed is not an issue here so I can live with Rser. For switching low voltages at low speeds, you can even do away with the series resistor.
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Rser is rif630 to limit any transient current and hence protect the digital port and Rpull is there to tie the gate to ground to avoid damage or the MOSFET from switching on when the gate iff630 open circuited if ever. Irrf630 would reduce the series resistor to ohm, especially if you are using PWM.
If you will be driving high currents with your IRF, I would recommend using a buffer between the arduino and the powerfet.
That’s why I’m positive that I do not need to include buffers etc. Only switching an array of LEDs that total to a maximum of 1Amp. If not, then you could be safe. No inductive switching etc. But I am curious: Please do not ask for unpaid help via PM, use the forum.
Anyway, my question is this: With reference to the attached figures, would you prefer option A or B to drive the gate from the digital output of the Arduino?
Thanks for the reply. As I said, I won’t be driving any heavy loads.
They offer reduced on-state loss by lowering on-resistance RDS onand reduced switching Just switching the LED array ON and OFF with seconds or minutes in between, so switching speed is not an issue here, but the 1kOhm series resistor can even go down to Ohms and still have the Arduino channel protected for transient currents due to the parasitic gate-drain capacitance.
What is your opinion on Option A or option B as gate drive?
You only need to use a driver IC if you are switching the mosfet at high frequency, so for your application just drive the gate from the Arduino. The product does not contain any of the restricted substances in concentrations and applications banned by the Directive, and for components, the product is capable of irf60 worked on at the higher temperatures required by lead—free soldering.
You are right, option B is slightly better because option A slightly reduces the gate voltage, and you are driving the mosfet with a marginal gate voltage anyway. Of course, using a buffer IC would solve all these issues, but why complicate the circuit and incur extra costs when this simple gate-drive works well for the current application? It always takes longer than you expect, even when you take into account Hofstadter’s Law. It won’t matter much.