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It always takes longer than you expect, even when you take into account Hofstadter’s Law. Formal verification of safety-critical software, software development, and electronic design and prototyping. Thanks for your reply. You say 1 Amp is not a heavy load, personally I would start worrying if the load is close to the arduino board.
driving an IRF from Arduino digital output pin
The product detailed below complies with the specifications published by RS Components. RS Components If630 of conformity. That’s why I’m positive that I do not need to include buffers etc.
I though of option B to solve the problem I know it is a minor one in practice. Price Each In a Pack of 5.
IRF630 N-Channel MOSFET, 9 A, 200 V STripFET, 3-Pin TO-220 STMicroelectronics
They offer reduced on-state loss by lowering if630 RDS onand reduced switching Just switching the LED array ON and OFF with seconds or minutes in between, so ir6f30 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.
Otherwise the current spikes will introduce problems at the arduino site.
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If you will be driving high currents with your IRF, I would recommend using a buffer between the arduino and the powerfet.
Only switching an array of LEDs that total to a maximum of 1Amp. 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.
Please do not ask for unpaid help via PM, use the forum. I would reduce the series resistor to ohm, especially if you are using PWM. 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 soldering The restricted substances and maximum allowed concentrations in the homogenous material are, by weight: What is your opinion on Option A or option B as gate drive?
As I said, I won’t be driving any heavy loads.
Rser is there 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 is open circuited if ever. Anyway, speed is not an issue here so I can live with Rser. In option A the gate voltage would be a little less than 5V because of the potential divider formed by the two resistors.
But I am curious: You only need to use a driver IC if you are switching ir6f30 mosfet at high frequency, so for your application just drive the gate from the Arduino. Anyway, my question is this: Thanks for the reply.
Of course, using a buffer IC would solve all irg630 issues, but why complicate the circuit and incur extra costs when this simple gate-drive works well for the current application? With reference to the attached figures, would you prefer option A or B to drive the gate from the digital output of the Arduino? That is what I do. For switching low voltages at low irv630, you can even do away with the series resistor.