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Jul 6, 1. Jul 2, 8 0. Hi, I am trying to build the circuit shown in this link: My aim is to be able to control the speeds of all of the fans at the same time.
DATASHEET IRFZ46ZPBF – International Rectifier MOSFET N 55 V 51 a To | eBay
Here is the data sheet: Could this stop the circuit from working correctly? Any advice will be greatly appreciated! Ps sorry for all the links.
Jul 6, 2. Oct 15, 5, 1, Are they DC brushless fans? They don’t work with PWM Second. You have the wrong datasheet for the IRFZ Check the specs again. Electro Monkey likes this.
Jul 6, 3. Jul 6, 4. How many wires on the fan? Irfs46 a part number? Jul 6, 5.
IRFZ46 PDF Datasheet浏览和下载
Jul 6, 6. Not gonna work with PWM. Not the best solution but it works. Jul 6, 7.
IRFZ46 (IRF) – Power Mosfet(vdss=50v, Rds(on)=ohm, Id=50*a), N-Channel
Jul 6, 8. You can always buy fans with a PWM control pin. Or build a variable LM supply. I can go from 5 to 12V and it works just fine.
You need to know how much current each fan will require though to ensure you aren’t overloading the variable voltage circuit with multiple fans. Jul 6, 9. Sep 9, 15, 5, I think that would work unless the fans are too big.
If you need more current, you could make an op-amp controlled, constant current supply with a MOSFET or two on a big heat sink. Or a darlington using a 2N with another catasheet transistor if you already have these laying around.
The op-amp watches the voltage drop across a shunt resistor and compares it to a reference voltage set by you with an ratasheet variable resistor.
Its output controls the power transistors to let more or less current through the bank of fans. These linear solutions are functionally the same as your resistor, but can handle much higher currents with ease and precision at a lower cost.
A variable resistor to safely handle your load is just too expensive. Need help with proper battery selection please.
Posted by Tony in Ohio in forum: Help with slowing fans Posted irrfz46 whoyah in forum: You May Also Like: Mini Pressure Sensors for Wearables and a Magnetless Position Sensor The sensing revolution is accelerating amid idfz46 uptake in automotive, consumer and industrial designs.
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