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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 [tag:gate-driving].

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Choosing a suitable power supply for a MOSFET driver chip

I would like to use the TC4427 MOSFET driver chip, in order to switch the current through the IGBT AUIRG4PH50S, which will be placed in series with a resistive load. The power supply providing the ...
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37 views

Gate driver question

My main problem in this deign, as you can see, is the mosfet gate driver circuit . How can the latter be improved, assuming that it cannot oscillate?
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How to turn on high-side MOSFET of a buck converter

I'm trying to simulate some buck converters with real MOSFETs instead of ideal switches. The problem is that I don't know exactly how to properly turn on the transistor. The simple buck converter ...
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60 views

IR2110 driver output causing shoothrough despite deadtime

I'm having trouble with the ir2110 output. I'm working on a class d full bridge amplifier and I use 2 ir2110 to drive 4 irf540N mosfets. The switching frequency I use to generate the PWM is 240kHz and ...
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How to drive a high side mosfet with the L6388E driver?

I've been trying to assemble a circuit to drive an n channel mosfet on a high side mode with this ST L6388E chip click here for the datasheet with this circuit: using 12V of a power supply and 5V ...
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What is the correct way to control voltage on a mosfet

First Schematic with N-Mosfet simulate this circuit – Schematic created using CircuitLab simulate this circuit I have a few question on these design. First designed has been built on a bread ...
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22 views

Choosing a transistor/mosfet in order to drive Peltier element from a RPI zero [closed]

I just found these two (1,2) low power consuming Peltier elements that I would like to include them to my project. What I'm planning to do is to drive them until reaching some specific temperature e.g ...
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70 views

How to isolate a RLC circuit with MOSFET switches?

I'd like to isolate, with high-side and low-side switches, a RLC circuit after the inductor has been energized with a current of 2-3A from a 12V source (see sketch). When the RLC circuit is isolated ...
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44 views

IR2301 Boost Converter

I am trying to build a boost converter using the IR2301 MOSFET gate driver. I succeeded in building a buck converter, by following the diagram shown below. The mosfet was driven on a high side whereas ...
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2answers
39 views

How to drive p-channel MOSFET

I need a high side switch. I thought about using a p-channel MOSFET. The source will be connected to around 50V-60V. How can I drive this MOSFET? I can't find a driver which can switch between 60V and ...
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44 views

MOSFET Driver P-channel

I want to create a DC-chopper to drive a motor. I found the following schematic online: However i don't understand how the MOSFETs are driven. On top there is a P-channel MOSFET with source connected ...
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How to deal with “peaks” voltages in mosfet in boost converter?

I'm designing a Boost Converter to go from 5 [V] to 12 [V]. The design I came with is the following: To understand better the design, please note the following: 1) To drive the mosfet I'm using a ...
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59 views

How do I drive 60 back-to-back LEDs (Christmas Lights)?

I would like to reuse some old LED strings. I hope to replace the (failed) original controller with an AVR chip, but I do not know how to construct the differential MOSFET driver stage. The sketch ...
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44 views

MOSFET driver circuit configuration for half bridge MOSFETs for power amplifier

I am making a class D audio amplifier and I am using a MOSFET driver to control two MOSFETs in a half bridge configuration as shown in the circuit below When I connected the circuit without the ...
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Why the half bridge bootstrap driver (L6384E) doesn't output anything no matter what?

I've been trying for the past few days to get the L6384E half bridge driver to work, the schematic provides the following circuit suggestion: This below is the circuit that I am using, and all I get ...
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46 views

Is this discrete mosfet driver ok?

I've come up with this mosfet driver, mostly inspired from other designs using push pull configuration. It consists of four transistors (1 pnp, 3 npn) + an optocoupler. Its intended operation is ...
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1answer
33 views

30N06L N-channel mosfet switching heavy load interfering with micro-controller circuit

I have a microcontroller that I want to use to switch on/off a heavy load (a car horn) with a 30N06L N-channel mosfet. Everything works when running a load of 4Kohms (with the car battery at 12v), but ...
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38 views

Issue with driving Brushless Motor with a MOSFET Driver

So I have been given a circuit which supposedly works. The circuit was the the one shown but with a 10k resistor where the scribbles are. Q17 is an IRLM6344TRPbF N-chanel MOSFET and Q16 is a ...
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30 views

Bjt for trigger MOSFET

I my project MOSFET need 13 v 65% PWM to trigger but controller output is 5 volt then how can I amplify this in voltage
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2answers
69 views

Select N-Channel MOSFET to drive speaker and LEDs

I have 3 circuits with MOSFET gates routed to MCU's PWM / IO and I would like to drive with them a Speaker, RGY LED and Backlight of LCD. There's a lot of parameters in MOSFET's datasheet. I am not ...
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19 views

Mosfet Based impulse voltage generator

enter image description here **Details- Mosfet_1 will turn on for 20ms and charge the capacitor C2 and after that, it will turn off. Then the Mosfet_2 will turn on for 3ms with 40kHz frequency and ...
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1answer
28 views

Single MOSFET motor driver with oscillation on output

I'm trying to drive a small DC motor with a PWM with the circuit below, where I'm using a TIL111 optocoupler and a IRF510N MOSFET. The PWM (50% duty cycle) is generated by a MCU STM32F103C8T6, the +3....
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81 views

Problem with IR2112 on Proteus

I am designing a pure sine wave innverter and am using IR2110 as a driver for the H-bridge. On protues however only IR2112 is available so i used it. I managed to get all the connections in a correct ...
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429 views

Can PWM affect a brushless DC fan given sufficient time?

tl;dr - Is driving brushless DC fans using PWM unhealthy for the fan compared to variable but steady DC voltage? If yes, why and how? The super simple ...
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3answers
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MOSFET gate resistance's power rating

I wanted to verify the following or get some helpful pointers. So, I have a gate driver which can supply a maximum current of 0.5A , and I am driving a MOSFET Vgs of 15V, based on these two ...
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108 views

FET Switching Loss in BLDC Inverter

I'm designing an inverter for trapezoidal control of a 500W BLDC motor, using DRV8301 for the gate driver. My switching frequency is 10Khz, Vdd is 48V, and Imax=20A. I've been trying to calculate the ...
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106 views

High Side MOSFET Driver

I am familiar with the bootstrap circuit and its design procedure. The steps involve: a) Figure out the Qg of the MOSFET at the Vgs you plan to operate (for instance Vgs=15V, Qg=150nC). Next, figure ...
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36 views

Variable Negative Bias for MOSFET Gate Drive

I am looking to generate a negative gate bias voltage for a GaN HPA I will be using for one of my projects. Per the datasheet, the typical off state (pinch-off) gate voltage is -7V, and the operating ...
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1answer
137 views

H-bridge MOSFET NAND gate driver suffered from logic voltage drop

I've tried to reproduce the NAND Schmitt triggers circuit to drive my H-bridge MOSFET as per following source: http://axotron.se/index_en.php?page=34&chapter=0 All my design files are at this ...
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Finding complementary PMOS for H-Bridge and connecting Gate-Driver

I am currently implementing a Half-Bridge using an IRF520PBF (Link to Datasheet) for the lower part of the bridge and I am currently looking for a PMOSFET for the upper part of the bridge (I am aware ...
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3answers
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Resistors getting hot in this MOSFET driver circuit

I created this circuit as general purpose MOSFET driver circuit for PWM frequency up to 10KHz (usually from microcontrollers): But R3 and R5 are getting hot soon as I connect 5V supply and I did not ...
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High-side switch for 24V controlled by logic level

I mainly use this high-side switch design for 5V and with low current loads (under 100mA). Based on the VDSS (-50V), I thought I could energize this design with 24V as well. Apparently, I am making a ...
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120 views

Precaution and Rules to Paralleling Power MOSFETs

I'm going to use a Full Bridge Inverter for my application. The problem is that the current which flows through the MOSFETs when they are ON can reach 70A RMS and the power dissipation is too high. ...
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74 views

why MOSFET Driver [closed]

Why do we youse MOSFET Driver when we use MOSFET as a switch in a high side configuration and we do not use it in low side configuration? Can we drive a MOSFET ON/OFF with the OUTPUT of UC3842?
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55 views

MOSFETs Gate Driver: Current drawn from the Power Supply

I'm going to use a L6491 High voltage high and low-side 4 A gate driver to drive a half bridge made from two IPW65R019C7. I'm going to use a +15V to supply the L6491 MOSFET Driver. How can I have an ...
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86 views

Can I use a MOSFET driver to blink an LED

I was testing the MOSFET driver LTC7004 and tried to supply power to VCC and GND from an Arduino Mega with a PWM signal. The schematic resembles a Bootstrap circuit. I connected an LED between pins ...
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1answer
63 views

Can I drive a Low-Side MOSFET from a High-Side Driver?

I'm working on a power electronics project where it involves driving 4 different MOSFETs, (3 HighSide and 1 LowSide). Rather than using a different IC for the LowSide driver, I am thinking about using ...
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2answers
143 views

MC34063 with external FET. Why?

Follow on from : earlier post Below is an LTSpice simulation of an MC34063 step up (5v to 9v) circuit. As you can see, this particular circuit is working correctly, and delivering about 300mA. The N-...
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2answers
103 views

Driving Mosfet, why is it burned? How should the circuit be modified?

I using MIC5018 to drive Mosfet (driving 48V,3A DC motor). Each power supply is powered independently. I am using a 48V, 3A DC motor. Before power-on, if it is connected to the computer (5V) and the ...
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262 views

Custom BLDC controller design for prototype Electric vehicle using MC33035 and need of closed loop control in high power EV application

The main objective of my question is to understand fundamentals required to build a BLDC controller and evaluate the design I have worked for months.My controller is divided into a power stage and ...
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1answer
52 views

Mosfet drive heating issue

I am trying to drive a motor/lamp (10 Amp Max). The voltage across the load will be controlled via an N-Mosfet. I started building the mosfet drive part and I'm kinda stuck. simulate this circuit &...
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3answers
105 views

Can I use a mosfet as a switch to power arduino?

I have a project in which I intend to use a NE555 timer to turn the arduino on/off on specific intervals. I don't want to use the ne555 output directly because of the current limitations of the chip. ...
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2answers
101 views

Why should half-bridge driver have resistance in series with VCC?

I am using the three of the RT9624A half bridge driver as part of a 3-phase motor control circuit. Everything was working well in testing until I got to about 80% duty cycle and one of the drivers ...
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1answer
217 views

Lithium ion battery protection IC not able to drive MOSFET

I have integrated the TP4056 charger design into my PCB, The problem is that when i connect the battery at the battery terminals, i could not able to get the voltage at its output pins, the circuit ...
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1answer
71 views

Strange behaviour of ne555 + pmosfet circuit

I was a silent reader for a long time and could solve all the problems on my own, but this problem is really freaking me out. I was messing around until 3 AM today with this "feature" and still don't ...
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2answers
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How to best choose a method of driving a MOSFET

I want to be able to control 12V as well as 24V LED strips that will be used in a video recording environment (so high switching frequency). In a few bullet points I will explain the planned circuit: ...
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118 views

Please help me critic my H-Bridge MOSFET motor driver circuit

This is the first time I build the H-Bridge MOSFETs driver circuit. Due to some limitation of desired components. It is all SMD, so I don't really have a proper way to test it before building the ...
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How to minimize DC brushed motor arcing noise propagation from MOSFET drain to gate?

I designed a basic on/off control circuit using 555 timer for a 3v hobby dc motor as shown in below. Without the motor connected, the output off the 555 timer is as shown below. (the mosfet drain is ...
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44 views

Driving MOSFETs with Bootstrap connections

I'm designing a type of a buck converter which has the following circuitry. Simulation runs fine on PLECS and I've added three bootstrap connections to drive these high-side MOSFETs (All top three ...
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1answer
112 views

Select bootstrap capacitor value too high

What happen if we choose bootstrap capacitor value too high in high side gate driver applications? Can it be harmful for MOSFET/IGBT or it is just not important?