mosfet

I'm currently encountering difficulties in testing my MOSFETs. I am in the process of designing a snubber for an IRF840 operating at 20kHz. Upon attempting to test (drive) the MOSFET, at <= 50% duty, in its basic state without any additional circuitry, I observed a 4V voltage drop from the 12V...

Hi! I am working on a university project. We are building a vehicle similiar to the BattleBots competition. Everything is working well but I have a problem with a 12 VDC motor controlled with transistor/MOSFET. I am using this motor water pump...

Good day everyone, so I have a problem with my two switch forward converter. As soon as the current increases at the input from around 200mA a transient/spike starts appears at both the turn-on and turn-off of Vgs. The higher I go and push it the bigger the spikes ultimately get, which is...

Hello, I am stuck on an exercise for a while with the circuit as shown below: We have: \[ V_{DD}=3.3 V \\ V_{tn0}=0.65 V \\ \gamma=0.5 V^{1/2} \\ 2\phi _{f}=0.6 V \\ V_{1}=2.85 V \] The question is: What is the best approximation for V2 in steady state? (a) 0 V (b) 0.65 V (c) 2.2 V (d) 2.65 V...

Hi all, I am new to electronics and designed my first circuit. However I fried one of my PCB and trying to determine the root cause. What I am suspecting is caused by a diode polarity that I missed. The PCB was working fine for about an hour or 2 without any issues. Then suddenly it stopped...

I have an issue with a very simple small board I designed in EasyEDA pro (I'm a novice so if the answer is easy, my apologies). I'm not sure I correctly connected the MOSFET in the schematic. Reference to Datasheet: https://atta.szlcsc.com/upload/public/pdf/source/20140314/1457707013919.pdf Part...

Hi, I have been working on a duracell 3000 w inverter model drinv3000, long story short, my dad used it with power tools and now it does not work properly, he measured the voltage, and it delivers 104V AC instead of 115. I already checked almost every component on the board (desoldering them...

Hi, we are designing a 48V high side MOSFET switch and we realised that the our mosfet gets too hot. Our solution is to connect additional mosfets in parallel to distribute the load/heat. But I'd like to ask your how to properly connect PMOS in parallel. I read somewhere that the gates should...

What should be the gate-source voltage waveform of the high side MOSFETs in a brushless motor drive with a trapezoidal control method? Are these parts marked in red in the picture above normal? There is no such thing at the bottom side MOSFETs Schematic: When I reduce the value of R47 and...

Hi. I plan to make a pcb that drives peltier and heating pad. Only one of those works at the same time. Load elements are parallel to capacitors. I have very little space on pcb so it would be nice if I could use only one inductor as it is in screenshot. I know it would be easier just to put...

Hi Everyone I have designed simple P-Channel MOSFET Circuit! it works well. However, when low Source power is applied(1V), glitch occurs in the output signal. I tried R,L,C component, But it didn't work What can I do to get rid of this? Circuit...

Hi, I made a really simple PWM generator but the mosfet placed in the circuit keep getting damaged even though they are not heating up. The load in the schematic is a 20ohm heating element but i also tried to replace it with much led and resistor but the mosfet still get damaged after 1 or 2...

Hello all , I have this circuit that supposed to light a specific led when varDC/DC is 20V And another led when varDC/DC is 15V and so on .. My question is , why do I have to add the mosfet and the voltage divider at the exit of the comparator (the red mark)?? it seems to me that I can...

I was trying to design a 2x1 MUX using a CMOS logic. I have used a 180nm library for the mosfets and made the circuits using Transmission gates. For simulation purposes, I have considered Width of PMOS as 3 times the width of NMOS. When S = 0 then the output should be D0 and when S = 1 the...

Hello All, For example, this gate driver from Ti (UCC21520) can drive GaNFET, IGBT, and MOSFET. But can it drive SiC MOSFET? Or maybe the IGBT Gate Driver (NCV57000) from onsemi, can it drive Si/SiC MOSFETs? why not a generic gate driver that can drive all switching devices? Thank you,

There're many articles and videos in the internet saying that FinFET has a big advantage in transistor density, however it's difficult for me to find an example about how one FinFET's fins are actually connected to other electrodes such that the density is increased compared to using MOSFET. I...

Dear All About Circuits Team, I hope everyone is doing well, I have a question about the MOSFET's behaviour, How can I figure out how much heat the Mosfet produces per amp and how much current it can consume when acting as a load? Below, the Mosfet application shown in the figure, it's an...

Is this circuit okay to drive dc motors with atmega? While sending to one signal input other one will be grounded from microcontroller. If not okay what additions or substractions are needed to create ideal h-bridge for dc motors to drive with atmega?

I was recently asked to use 2 mosfets to make a switch that turns a fan on/off via a PWM pin of an stm32 (this allows a gradual switch-on of the fan and not all at once .. here). I cannot understand why I need two and not one mosfet. Maybe it's because having a GPIO PWM [0 ... 3.3]V output that...

I need clarification regarding ROHS compatibility of NVTFS5C471NLWFTAG(n-Channel MOSFET). Document given by onsemi says Now, I need to confirm this ROHS compliant or not? Because the exception calls for “Lead in high melting temperature type solders(i.e. lead based solder alloys...