1. A

    P-Channel MOSFET always on

    Hello Hello I am using a MOSFET driver circuit with SI2303 as p-channel mosfet and SI2302 as n-channel mosfet. I have given control signal (of 5V) on the gate of n-channel mosfet to turn-on and off the p-channel mosfet. However, the p-channel mosfet is not getting off and I am constantly...
  2. D

    MOSFET or RELAY for High Current DC Switching

    I'm working on a remote start system for an older gm diesel vehicle and so far everything has worked great, but I've hit a stump that I just cant figure out. The engineers who designed the ignition switch of my truck though it would be a good idea to run starter solenoid power though the...
  3. J

    Operational amplifier MOSFET vs BJT

    Hello, I have a question regarding operational amplifiers. Whenever I search for some datasheets of high gain and high-speed Op Amps ( BW higher than 50MHz), I mostly find that they are made of bipolar transistors rather than mosfet. Why is it so? I've done some research and I've found that...
  4. J

    Working principle of a mosfet

    Hello, I have a dumb question about the working principle of a normal mosfet. When it is used as a switch, when we apply a gate voltage higher than the threshold it will output the voltage present at the source. It happens because it is working on its linear region. When we use a mosfet in a...
  5. Bhanu2626

    Does the MOSFET in the Schematic will work fine?

    I using the MOSFET IRFB3004PBF switching. 56.2V is a source voltage coming from the charger and 48 is the nominal voltage of the batter. switch S1 is for switching Vgs. Vgs=5 v. Rgs=10k ohms (connected to the gate terminal and battery ground). battery is 13s3p Nominal=48v Peak=54.6v Will MOSFET...
  6. fablau

    Why the second MOSFETs in a two-MOSFET series shorts?

    Hello everyone. I am working on a project that involves the use of MOSFETs to turn a matrix of electromagnets on/off. The project is quite complex and involves several different circuits, but for facilitating this specific discussion, I have simplified the circuit to focus on this specific...
  7. marcell46

    Small signal analysis of MOSFET circuit

    The other day I got the following exercise on one of my exams: For those who don't speak German, for transistor 1 lambda is 0, but not for the others. The backgate-effekt should be neglected alltogether. I drew the following small signal equivalent circuit (ignore the black texts for now)...
  8. H

    Purchasing MOSFET and MOSFET Driver

    I want to buy a MOSFET in the rating of 600V/20A. I also want to buy MOSFET driver for that. I have to use it with Arduino Uno for controlling purpose. But I can't select which one to buy. Can anyone suggest me a good MOSFET + MOSFET Driver?
  9. MrsssSu

    How to fix this circuit (IR 2184) ?

    Hi all, I refer to this website at here . This circuit should give a complementary square waveform (R1 square wave & R2 inverted square wave). However, I did get a good square wave across R2 but R1 did not get any square wave. Does anyone know how to fix this? I have attached my LT spice below...
  10. MrsssSu

    Half-Bridge Inverter (IR2184) chip connection

    Hi all, I bought this IR 2184 which is used in half-bridge inverter. Will the peak voltage of PWM of GS of mosfet as shown in green will be according to Vcc which means in this case, if I use a Vcc (12V) and PWM of 8V peak (IN), it will output a 12V peak square wave at GS of both mosfet? And...
  11. M

    How to switch a 2v load using 3v Signal

    Hello guys New here. I am trying to work out what would be the best way to control a 2v load using something like an ESP32 (3.3v) So what i have is: ------------- | BATTERY | (1.5 - 2.2v) ---> something?? >>> Resistor ---------------...
  12. K

    Switching response of an inductor

    I am experimenting with an inductor to see what is happening when it gets saturated and at which current it happens. So I set up the attached test circuit and checked the current on the 1Ω resistor. I expected the current to ramp up until the inductor gets saturated and then to increase at even...
  13. A

    MOSFET vs IGBT

    For identical absolute max current and voltage ratings, which one is more reliable, IGBT or MOSFET? For 600v, 20A for example, MOSFET is significantly cheaper than IGBT. I'm not sure if it is by chance, but if mosfet is truly cheaper for similar thermal and electrical characteristics, then is...
  14. S

    Can someone help me please!!!? IRFZ44n MOSFET heats up driving TEC Peltier

    Hello everyone, I would really appreciate if you could help me Im making a mini fridge controller (PID), using a 4n25 optocoupler, an IRFZ44n Mosfet and a tec peltier I connect it to a 12v and 3 A and arduino 5v As soon as the arduino code is uploaded and I connect it, the mosfet starts to...
  15. Doktor Jones

    P-channel mosfet and 555 for power-on delay?

    It's been forever and a day since I've been here, but I'm dipping my toes back into electronics design Anyways, I have a "dumb" device that's connected to a hat on my Raspberry Pi 4. Unfortunately, due to some signaling issues with the dumb device, if it's on when the Pi powers on, the Pi gets...
  16. Siridean

    Top Level Design help for a 'switching array'

    Hello, I was hoping to get some help/advice on a personal project I'm working on that requires quite a bit more electronic hardware involvement than I'm used to. I can manage code, computers, microcontrollers etc fine but I'm not very well educated in general electronic hardware at all besides...
  17. M

    No B+ Voltage on CRT monitor

    Hi, I have a crt monitor that dosent work now, I figured out that a mosfet was running very hot and was shorting the smps(making it stop and restart), I removed it and saw that theres no short circuit now and the led/buttons works but theres no picture, it's the mosfet that generates the B+...
  18. electromeow

    Relay or MOSFET for high current?

    Hi, I have to switch a high current(DC 12V@~60A approx.) for a battery-supplied circuit. But its on-status resistance should be as low as possible. Because you know the Ohm's Law, the I is going to increase up to even 100 amps sometimes, so a very small resistance creates a big difference. I...
  19. flaviotmz5

    Gate driver for two switch forward converter

    I'm trying to understand how to drive the MOSFET's in the two-switch forward, I designed a 200W DC-DC converter, 50V input 100V output but I was looking for using an MCU and IC in this case I have an IR2110 high side low side for the gate drive, I don't know if it is possible to use it? and if...
  20. MrsssSu

    High Voltage PMOS recommendation

    Hi readers, is there a P-channel Mosfet with Vds of -400V but has very low Rds(On) because I want an efficient mosfet ? I a planning to power a 400V device and its negative terminal must be connected to ground (That's the reason why i use PMOS and not NMOS). I find a lot of NMOS that can...
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