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Metal-Oxide-Semiconductor Field-Effect Transistor, a type of field-effect transistor (FET). MOSFETs have an insulated gate, the voltage of which determines the conductivity of the device. This can be used for amplifying or switching electronic signals. (From: Wikipedia)

9 votes

Can PCB dissipate heat from MOSFET so that a heatsink is not needed

Which revision of the datasheet are you using? I see 1.0 W listed for 25 degree ambient. Anyhow, the PCB material itself if very bad at dissipating heat, you need copper planes to do anything. The DMP …
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9 votes
Accepted

What's the purpose of the MOSFET on the output of the flyback buck converter in this circuit?

Going for a MOSFET instead, the BSC070N10N has 7 mΩ rated resistance. Running somewhat hot, it will however increase to 9.5 mΩ. At 6 A, this translates to about 340 mW of dissipation. … It is however more expensive than the diode and needs additional circuitry from the extra secondary winding and parts between that and the MOSFET gate. …
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7 votes
Accepted

Choosing a power transistor with low dissipation

+1 on what Andy said. Not what you asked, but what you need is a bog standard low side N-FET PWM driver. simulate this circuit – Schematic created using CircuitLab Such a device is most likley avai …
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5 votes
Accepted

Why is my inverter circuit outputting this waveform?

Your high side MOSFETs are N-channel, so you need gate voltages above 12 V to turn them on. Presently, your opamp which drives them are driven from the same 12 V rail so they can't turn on. Either you …
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5 votes

Cooling IAUC90N10S5N062 MOSFET from the top

Consider a MOSFET made for the purpose such as FDMS86101DC which has a thermal pad on both top and bottom of the capsule. … Image from: https://itecnotes.com/electrical/electronic-how-should-i-design-a-heat-sink-for-an-smd-power-mosfet/ …
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5 votes
Accepted

What limits the number of MOSFETs/IGBTs in series or in parallel?

Your simple small MOSFET SMPS on your bench will usually work fine with parallelled MOSFETs as long as you have individual gate resistors. …
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3 votes
Accepted

Control LCD backlight using PWM

Depends on what you are driving the MOSFET from (PWM source). 10-100 Ω is a good starting point. …
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3 votes
Accepted

Why does a MOSFET cause a PAM8403 amplifier board to rapidly reset, and how can I fix it?

If you do need to having to switch off an IC, do it on the high side with a P-channel MOSFET and pay attention to any exposed inputs which may still receive voltage higher than ground which may need attention …
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2 votes

Why is IRFZ44N MOSFET with ESP 8266 always closed?

You need either a MOSFET driver (or some level sifter) or a MOSFET with lower Vgs(th). Your gate voltage from your ESP needs to be significantly higher than the rated Vgs(th) of the MOSFET. …
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2 votes

Half bridge motor driver; best motor placement?

Your PWM source may be too weak to drive a 24 A capable MOSFET, so you may need a buffer in between. C1 is your local decoupling, unless you really know what you are doing. …
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1 vote

MOSFET as a switch to control 12 solenoid valves using arduino

Your MOSFET needs to have: Low enough Vgs, gate threshold voltage so that your 3.3 V from the arduino will switch it. …
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1 vote
Accepted

Relay Vs MOSFET or IGBT

20 A is probably too low to justify the forward voltage drop of an IGBT versus spending the same money on MOSFETs. Relay is the cheapest option but reliability will suffer since they can stick and w …
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1 vote

Rule of thumb to select MOSFET transistors based on conmutation frequncy

That's difficult to answer in general since it comes down to how it's used, mainly soft versus hard switching but for a simplified hard switching topology, you want to limit the switching losses to so …
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1 vote

MOSFET connection within oscillating circuit

Move your V4 source from ground to source of top left transistor. If LTspice complains about it floating/takes forever to simulate, add a 1 Mohm resistor to ground. No gate-source voltage. No. Ye …
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1 vote
Accepted

DC motor causing project to work unexpectedly

Looks like your circuit is missing a decoupling capacitor. If you have a motor in the circuit, you will probably trigger undervoltage lockout/brownout protection followed by restart. The normal decou …
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