mosfet control

Yesterday I damaged a MOSFET I'm using in a simple control circuit, but it failed in a strange way and I'm trying to figure out what might have caused the failure and how I might prevent it in the future. The MOSFET is controlling a 5v sensor by switching the low side of the power for the...

I have developed a synchronous buck converter, but there is something I don't understand. I am measuring the voltage drop across the low-side MOSFET. In my simulations, the voltage drop during conduction of the low-side MOSFET is negative (around -10 to -20 mV). However, real measurements show a...

I am pulsing a 38mH coil (16 AWG wire wrapped around a small tube) with a IRFB4115pbf MOSFET at 66.6v (3 lipo 5200mAH "50C" battery's in series). It's a lot of juice! Using Lt spice I simulated this and found that the voltage spikes can reach up to 20kv. I am trying to figure out if I should use...

I am making a traffic light circuit for an outreach event however I have little components. I have a working circuit using BJTs (shown below) on LTSpice however I only have signal mosfets (2N7000). I have also included the output of the BJT circuit. I am trying to adapt the circuit to work with...

I want to create a 24v to 12v buck converter. I am trying to control mosfet with optocouplör. I have 25kHz-50kHz pwm signal from arduino/pic16f877A. I have some mosfets like IRFZ44N, IRF540N IRF4905 and etc. I am using PC817 opto but I guess it is not suitable for high frequency pwm like 25kHz...

Hello, I'm working on an energy harvesting circuit known as an in-house harvesting circuit (cc-ih) and would appreciate some guidance on implementing it in Simscape within Simulink. Circuit Description: The circuit is designed to harvest energy using the following key components and process...

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...

I'm trying to fix SSB 25W amplifier, it's worked and I overrated Amplifier with voltage, and step modulator voltage regulator get burned, which is inside with amplifier in Al box. New voltage regulator...

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, 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 been checking the EVAL-ADUM4146 evaluation board for the ADUM4146 gate driver. In this board, they are using a (2W, +15/-3, +93/-185mA) isolated DC-DC converter module which is the R12P21503D. And in the gate driver datasheet, it says: 11 A short-circuit source current (0 Ω...

Hi sir, I am trying to find a suitable solution for heating and cooling of a special part of my circuit. For that, I have chosen a Peltier element and would like to use an Double BTS7960 43A H-Bridge motor driver module with a PWM Control. This H bridge module suitable for the regulation of the...

I want to make this circut to swich more sharp... Now, the MOSFET begins to drive gradually as the voltage is slowly rising on the capacitor. Can we make the MOSFET gate to see the voltage, only when it has raised above 6V ? What I'm trying to do is to get a "high" level in the mosfet drain for...

Me and my friends have been building a project for a couple of months now and we got stuck on on something we dont have much experience with. We need to connect 4 charged capacitors into series in order to have a higher voltage than the supply, we have been using relays and a arduino nano to do...

I need to design a 12V dc circuit where I can turn on a variable current into a resistor load. I need two levels of current - ~50-75 ma for a few minutes, and 1-2 A for a few milliseconds. There is a chance the load will open under the high current scenario. I need help selecting a suitable...

Hi all, I'm trying to drive a RFP30N06LE N-Channel MOSFET with TC4420 MOSFET Driver. The MOSFET is used to switch a [1W LED][1]. The input to the MOSFET driver is provided by the 5V from an Arduino Nano. But my circuit is not working: it seems that the VDD somehow leaks to the input of the...

Hello everyone, I am thinking of developing a controller that can adjust the brightness of 12V, 50A, and 600W LED. - Mosfet 1 Spec Model : NTBLS0D7N06C Datasheet : https://datasheet.lcsc.com/lcsc/2108141230_onsemi-NTBLS0D7N06C_C903210.pdf Rds(on) : 0.75mΩ - Mosfet 2 Spec Model : IRFP1405PbF...

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...

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...

i have a 3.3v digital pin, attempting to use a PNP to switch an Nfet (Vdrain=5v) on/off at a rate of 1kHz. i can't use the inverting-NPN method to drive the gate because that way the Nfet would be on for a few mS after POR. Here's my circuit with a minimal # of parts: Am i full of it? Is there...