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Questions tagged [mosfet-driver]

A circuit that accepts a small-signal digital input and produces as output a high current appropriate for driving the gate of a power MOSFET. See also the [gate-driving] tag.

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How would you Improve the Smoothness of a 12V DC Motor Drive with Limited PWM Frequency?

I am developing a control system for a 12VDC brushed motor rated at 500W, which is part of a larger project. Currently, I'm using PWM for motor control, but I'm restricted to a maximum frequency of ...
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How can I slow down the rise and fall time of a power MOSFET without adding a delay before the switching begins?

I'm building a simple 5 W HF CW transmitter, where the power to the final stages is controlled by a P-Channel Power MOSFET, whose gate is connected to a key. I added a simple capacitor between the ...
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How can I drive a MOSFET with high input capacitance using discrete transistors? [duplicate]

Driving MOSFETS at high frequency is hard, especially if the MOSFET has high input capacitance (as high power MOSFETS typically do). There exist dedicated ICs to drive such MOSFETs. However, for my ...
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I am Seeking Help to Adjust DC Motor Simulation Parameters in LTspice for Accurate Current Modeling

I'm relatively new to LTspice and motor diagnostics, but I have managed to build a PWM-MOSFET control circuit for a DC motor. My goal is to simulate this project to evaluate potential ripple currents ...
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IR2104 driver for 7 A motors

I'm currently working on a driver board for a pair of small FIT0185 motors with a nominal current draw of 0.35 A and a stall current of 7 A. I've opted to make two H bridges using four IR2104 mosfet ...
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PCB trace width for high current motor driver

This post is a continuation of Trace width for PCB motor driver board, with a few follow-ups and questions. Firstly, I'd like to mention again that the motors I want to use have a maximum current of 7 ...
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Trace width for PCB motor driver board

This is my first time working on a PCB microcontroller board. I'm working on a project that involves the control of several DC motors with encoders, and I've opted to make my own microcontroller board ...
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IX4340 witn N and P channel MOSFET [closed]

In the datasheet I saw control of only N channel MOSFET, and the driver is positioned as low-side. However, one of its pins is inverted, so I think I can put a P-channel MOSFET there... (I'm driving a ...
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Using a 24V dimmer with 12V

I have a Paulmann 70975 24V LED touch dimmer that I want to use with 12V LEDs. The input voltage is provided by a MeanWell LPV-60-12 12V 5A power supply. The consumer is a 12V 2835 white LED stripe of ...
redspider's user avatar
2 votes
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Normally closed N-channel MOS driver

I need to control high power N-channel MOSFET with ATmega328P. The lowest transistor resistance is achieved at a gate voltage of 8-10 V, just like the main VCC, so I'm thinking of using something like:...
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What type of input is required by a gate driver? The data sheet says 50 A

I'd like to drive a TI UC3708N gate driver from a handheld AWG square wave that varies between 0V and 2.5V. According to the data sheet, anything above 2V should be treated as high: However, I'm not ...
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BLDC Thermofan PWM Controller design recommendations

This circuit is intended to drive small automotive cooling fans (~70W) The gate drive IC is failing when starting from a stall and pops instantly. If current is limited on startup to around 5 A, ...
user_user's user avatar
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PWM Universal Motor Control

I recently posted a question about a circuit I had that wasn't working, and received some feedback indicating that most of my circuit was just... not good. Original post I drew up a new schematic, ...
BoomSoon's user avatar
3 votes
5 answers
332 views

How does this gate driver generate 200 V from a 12 V supply?

How does this gate driver generate 200 V from a 12 V supply? And why when off does it never go below 50 V? ...
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2 votes
2 answers
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MOSFET driving with 3.3 V PWM signal (using gate driver IC)

I need to drive a 12 V water pump (max. 2 A) with a PWM signal (20 kHz) from ESP32. I have a few questions about my circuit (I am a beginner). I have made the following calculations (Learned from ...
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How can I simulate driving a high capacitance MOSFET with a gate driver IC?

I'm trying to drive a MOSFET with approximately 2nF of capacitance, using a 1EDN7511B gate driver. Following the data sheet sample circuit, I created this: and tried to simulate it on LTSpice using ...
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Peltier cooler driving circuit

To prevent closing as duplicate immediately, there is the list of the most relevant questions: How to drive a Peltier element? Driving a Peltier w/ PWM or analog out Driving a Peltier element with ...
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Modelling a Desaturation detection circuit on LtSPICE

I am trying to model a gate driver desaturation detection mechanism with discrete elements on LTSpice. The waveforms I have obtained now provide a constant Vdesat of about 5.6V when MOSFET is turned ...
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How to select resistors for MOSFET Gate terminal?

I need to design Buzzer circuit. While i searching for reference design in google i saw one design based on buzzer, Here they drive a buzzer by using MOSFET. Here My doubt is, they used R23 & R24 ...
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2 answers
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DC motor MOSFET driver (with flyback diode) keeps burning through

I am trying to build a (simple) DC motor MOSFET driver with an unknown specification of the motor. This is my schematic: The problem is that the circuit works for one, maybe two cycles (1 cycle = 1 ...
Josch's user avatar
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Driving a MOSFET with optocoupler and a voltage source between 5-60 V

I am studying how to design an optocoupled active load, and I need to control the MOSFET with the signal obtained from a 4N25. The voltage that will be used at the gate will come from the load to be ...
Delfino's user avatar
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2 answers
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Reverse Diode on MOSFET Gate Drive Resistor

I am trying to create a H-Bridge to power a TEC. Each of the half bridges can be used as a synchronous buck converter, while the other side is grounded. The frequency and duty cycle are controlled ...
Fried Electronics's user avatar
1 vote
4 answers
191 views

Why is my inverter circuit outputting this waveform?

I'm designing an H-bridge inverter circuit for a class project. This is my circuit: My professor doesn't allow me to use any existing ICs apart from op-amps and the 555 timer, so that is why I'm ...
I like custard's user avatar
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Why is my MOSFET gate driver resistor burning out?

I'm trying to build a ~20W LED light recently, and below is the schematic and PCB layout of the driving part. In this design, I used a PD deception chip CH224K to request a 20V voltage from the USB ...
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1 answer
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Where is the flaw in this transistor, FET, Diode design?

I'm a hobbyist and I've designed and built (fabbed a small circuit board, schematic attached) a circuit to power a brushless DC motor using a solar panel which also charges a stand-by battery and ...
OCPatch's user avatar
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Ne555 Dimmer using IRFZ44

Excuse me, i am trying to deal with my semi-conductor devices course's assignment of my first year. My topic is that using ne555 and irfz44 to drive a resistive and inductance load like Led or Motor. ...
CÔNG NGUYỄN DUY's user avatar
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High frequency gate signalling from TLP 250

I am trying to work with MOSFET 10n60 at high frequency but the gate to source output and the drain to source is not right at high frequency.Blue signal is drain to source and yellow signal is gate to ...
Youssef01's user avatar
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117 views

What is the best approach to switching heavy loads with parallel MOSFETs?

I am going to build a spot welder with 20 MOSFETs in parallel (datasheet), each one capable of delivering 550A (1.2 kA peak approx.) powered by 35 mm2 cables connected to a 60 Ah 12 V car battery. In ...
Roberto Tascioni's user avatar
1 vote
1 answer
123 views

IRF520 MOSFET won't close when voltage is applied

I'm trying to make a simple MOSFET switch but something weird is happening: no matter the gate input, the LED stays on. Ultimately this circuit is meant to drive a stepper motor but I'm using an LED ...
Pedro Costa's user avatar
1 vote
1 answer
62 views

How to calculate required gate resistance

I want to limit the rise and fall times of a MOSFET with a gate resistor to prevent large EMI. My calculation is as below: ...
CaveScientist's user avatar
1 vote
0 answers
78 views

Use a pair of half-bridge drivers to make a full-bridge driver

I intend to use a pair of half-bridge drivers and a logic gate to make a full-bridge driver for controlling my DC motors with 3 standard input pins of Enable, Direction, and Arduino PWM. I looked at a ...
hrsk2002's user avatar
1 vote
1 answer
113 views

Control a large array of high-power LEDs with a GPIO pin

I have an array of about 10x10 high-power LEDs driven by a ~200w LED driver. I want to turn on/off the whole array using 3V3 logic with a single GPIO pin on some controller. The 10x10 array consists ...
étale-cohomology's user avatar
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49 views

How to Design an Efficient H Bridge using MOSFET for DC Motor (12 V)?

I would like to ask what is the most efficient H-Bridge design using MOSFETs (IRF9540N and IRF9540N). I found many references in this forum like using and I am still confused to decide. My goal is to ...
SKevinAR18's user avatar
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1 answer
87 views

Driving a power MOSFET successfully

I have recently purchased this power MOSFET for a project (dump load resistor): https://uk.rs-online.com/web/p/mosfets/6867852?gb=s Alongside this I have bought a MOSFET driver see link: https://uk.rs-...
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1 answer
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Is there a difference between a "load switch" and a "mosfet driver"?

I'd like to use the proper term when talking to fellow EE. Is a load switch simply a MOSFETs half-bridge driver?
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5 answers
255 views

Non-inverting buffer to drive LED using different power source

Some of the answers are now incorrect because the original question was "confused". In an ideal world, the question should have been maintained with its original sense after answers were ...
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1 vote
2 answers
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How to protect N-type mosfets in parallel againt back EMF of a transformer

I saw this schematic on a blog and I tried building it but always burns some of my mosfets. I am using the oscillating and driving part of this schematic with the exception of the battery charger part....
Kumah Andrews's user avatar
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0 answers
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Controlling logic gate and dead time for H-bridge MOSFETs

I intend to make an H-bridge driver for a 36v DC motor that can control with 3 MCU pins (Enable, PWM, Direction), Regarding my research, there are three options to drive the H MOSFETs; One using the ...
Hamid s k's user avatar
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2 answers
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Minimum on-time does not depend on MOSFET

I would like to better understand this topic: Minimum ON time for a buck converter One of the answers seems to say that the minimum on-time depends on the selected MOSFET. According to the datasheet ...
Jess's user avatar
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0 votes
1 answer
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Building a half-bridge zero-voltage switching inverter for induction heating

I am not an electrical professional so please me patient with me. I'm trying to build a half-bridge ZVS inverter for a small induction heater (I want to try to do some small scale welding). I tried my ...
Brick's user avatar
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5 votes
2 answers
153 views

Is Vgs a concern when using a high-side FET driver?

I would like to use the MIC5014 to drive an N-channel MOSFET as a high-side switch. My supply voltage in this system is 24 V. I understand that the MIC5014/MIC5015 uses an internal charge-pump to ...
BonsaiOak's user avatar
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1 vote
2 answers
53 views

Can I use GPIO logic level converters as tiny low-current solid state relays?

In order to use a GPIO pin to drive a 180 mA mini water pump, the GPIO pin needs to switch a MOSFET or an Optocoupler because it can't safely do 180 mA. I want to run 16 low-current pumps from 16 GPIO ...
Redsandro's user avatar
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1 vote
2 answers
923 views

IRF630N MOSFET burns after a couple of times in use [closed]

I made a simple circuit using an IRF630N to drive my loud buzzer. The Arduino code is very simple, just high and low on the pin for a fraction of time. Following is the schematic of the circuit After ...
Hamid s k's user avatar
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8 votes
5 answers
2k views

How necessary are gate resistors for MOSFET gate driving?

I've been studying MOSFET gate driving recently, aiming to understand the importance of layout. To investigate this, I designed a PCB as shown below: In this PCB, I used the FD6288T (https://static....
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1 vote
1 answer
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Slow simulation on LTspice

What could be the reason for the slow simulation speed for this converter circuit I have emulated from Fig 9-5: https://www.ti.com/lit/ds/symlink/lm5145.pdf?ts=1710376974553
Andr7's user avatar
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1 answer
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Power Up Delay Time of Gate Driver

Can someone please explain it to me what does these delay times (highlighted in red box) practically mean during the operation of the gate driver? Attached is the datasheet for the same: https://www....
Andr7's user avatar
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2 votes
2 answers
225 views

Driving high side back-to-back MOSFETs

I need to make a bidirectional load switch which can work with voltages 0-18V (or as low as possible if 0V isn't feasible) and currents from -3A to 3A and which needs to be able to switch quite fast (...
igor b.'s user avatar
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4 votes
3 answers
308 views

FETs in push-pull converter keep blowing

I have a push-pull converter that uses BSC040N10NS5ATMA1 MOSFETs. I have also tried using CSD19533Q5A MOSFETs. The FETs keep blowing at low power output (about 15 W). I am trying to get to 100 W. They ...
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-1 votes
1 answer
71 views

15 V valve not driven by an IRF3205

I am trying to drive a 16 V pressure valve using an IRF3205 MOSFET. I am using a TMS320F280025C controller to generate PWM signals. The PWM pulses have a frequency of 20 kHz and a voltage of 3.3 V ...
SAU's user avatar
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0 votes
5 answers
230 views

How can I protect a MOSFET from high voltage spikes in a DCDC converter?

I built DCDC converter using TL494 that is able to step down 30-200V to 12V with reasonable output. The circuit worked fine for quite a while, but I have always tested it while slowly raising the ...
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