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Good luck, but dont hesitate to ask again shld you need further advice. Thanks — You are correct. My dilemma is am new to this field so is there any other better power MOSFET for high voltage switching application and driver for the same.

It already switches on at much lower voltages, albeit not completely, but the optimal voltage is around Volt. Switching speed indeed is important.

This is not the gate voltage to turn the device on, its the gate voltage at which it switches fully off less than a few uA of current, typically. Is this what you mean?

IRL 3705 N

That is definitely enough for most applications. If you feed it with 15Volt the output voltage is around volt which will do the job. It is not a true logic level mosfet, it needs some 10 volts. Please help me out.

IRL Datasheet, PDF – Alldatasheet

Or for a power rectifier? In general you want a MOSFET that has a low Rdson and switches fast at the available triggervoltage 5volt with ttl and ofcourse can take the voltage and current it will be exposed to.

  ASTM E165-09 PDF

Apologies foe my late reply. I am not sure where you are based but the IRL costs abt 60 cts where I am. Im actualy pondering the same question as Legolas.

Well what an amazing article. At 10 volt it is 4mohm and the fet can take 45 amp, but at 4. Or am I overlooking something? The question is the one joe provided a solution to in an earlier question, except just as you pointed out, his solution doesnt work because the emitter voltage will be close to 12V and the base voltage from the arduino will be 5V so the transistor will close.

Some people however have trouble reading a datasheet or do not know what to look for and in that case foing with TTL level FETs catasheet a safe option. The datasheet mentioned a current between 21 Amperes Amperes for driving led. According to your post and the datasheet, the IRLN should have no problem supplying the current at this voltage, right?

Irlnl datasheet, irlnl pdf, irlnl data sheet, datasheet, data sheet, pdf, international rectifier, 55v single nchannel hexfet power mosfet in a to package. But if it is working for you, that is good.

If it does open at 3 volt and your PIC supplies that, adding a transistor is not really necesary and if you do it doesnt need to be the BC, can be a regular signal transistor too, like the I should turn on a load some LED lamps in paralel with a Mosfet. Dinah, that your lights do not light up immediately seems kinda odd, but could be a habit of the lamp you are using.


That just will make your circuit much easier and save you a transistor and resistor. I am getting almost 7V at the gate so no issues.

This actually datadheet used for heatedbed in 3D printers up to A. The relatively cheap BUZ11 is also an option. Hi, really interesting your information!! I have done like you said. Who can tell me what should I improve i my schematic?

Irl3705 datasheet pdf download

Should you however be stuck with a FET like the IRF that really needs a high voltage to switch efficiently then use the following circuit: I would like to use it to switch car heated seat 12V, 8A.

The simplest circuit is just a 12 V regulator but that is very inefficient. Excellent post, was very illuminating! As there is an LED in the source to ground i presumethere is already a voltage drop, keeping the source above ground.

That 52 mOhms at 2.

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