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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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Understanding Mosfet Circuit with PWM

I am wanting to control a voltage range of 0-10v across a 10k load with PWM from a micro. Now I was told to use this circuit with an n channel mosfet: This is what I understand so far: R1 is to ...
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High current, high frequency IC PWM switching with MOSFETs

I'm designing a circuit for an automotive application (chassis ground) that has a number of MOSFET outputs to drive large LED arrays and smaller motors (application tends to favour non inductive modes,...
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48 views

Bulk Capacitor for Motor Driver

I'm creating a motor driver for a BLDC motor. I was wondering how we can calculate or choose what capacitance we need for our purposes. We're using the motor driver for a chain drive /transmission ...
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MOSFET Controled Relay Problem

As a way to power-on/-off a circuit load, a MCU is used to drive a relay through two MOSFETs. The problem is, when the MCU GPIO output is measured 0-volt, the relay could stay connected. Can anybody ...
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43 views

Inverting output of gate driver for MOSFET

I am using this circuit to control the speed of a small motor (12VDC, 0.3A). The arduino PWM output saturates a 2N2222 NPN transistor which saturates the mosfet gate. My issue: when PWM is high (5V), ...
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81 views

Why P and N channel MOSFET is quite hot during braking of 3PH BLDC motor?

IRF4905 datasheetIRF 3205 Datasheeet I am working on a 24-volt BLDC 3ph drive application. I have made this design with a basic understanding of p and n channel MOSFET. In this design, MOSFET gate ...
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IR2101 MOSFET driver shows error in Proteus [duplicate]

Here is the circuit I am trying to simulate, with HIN and LIN at 5 V PWM, 50 % DUTY cycle. The circuit runs OK for 2-3 seconds and then shows a simulation error. I have plans to make an H bridge ...
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44 views

IR2101 MOSFET driver shows error

Here is the circuit I am trying to simulate, with HIN and LIN at 5 V PWM, 50 % DUTY cycle. The circuit runs OK for 2-...
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1answer
57 views

MOSFET gate switching time

In high current boost converter (6-14A input, 5A output), how to determine optimal switching time for the MOSFET gate, to get balance between power loss and switching noise? I mean the time MOSFET ...
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48 views

Off-the-shelf Device for Logically Controlling 12V Loads [closed]

I built a circuit that allows me to control a load current using logic by using a P16NF06L MOSFET. Here is the circuit: source What I need now is something that does the same thing but has multiple ...
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52 views

P-Channel Mosfet Gate Drive Topology with 20V Vgss Protection?

NOTE: This question concerns topology - circuit values are omitted intentionally. I'm strongly considering the use a P-Channel mosfet to serve as a high-side switch within a circuit. All P-Channel ...
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29 views

getting arduino PWM from 0-5V to 0-10V or 0-12V?

I have an IR2110 driver and a LOD voltage regulator 15V from a solar panel. now this will supply 15V to VCC as shown below. Since I have a LOD voltage regulator of 15V, I can't apply the same voltage ...
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54 views

Low side driver isolation issue

I am using a low side driver from Infenion BTS3080EJ. Details here. The input from the microcontroller will drive the IC BTS3080EJ which will drive a contactor (12V, 1.3A). I want to know whether I ...
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35 views

Using IR2110 driver in synchronous buck converter?

in using MPPT charger for battery, can use a variable input- fixed output voltage regulator that will be connected to the solar panel input?, this way I can have 15V for VCC and 5V for VD. I really ...
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Problem with Line to Line Voltage Output in 3 Phase Inverter MOSFET Bridge Circuit

I have a problem in my 3 phase inverter circuit output. Below, i've attached an image of my circuit. As you can see, i have 3 outputs. There are R, S, and T. So, i've measured line to line voltage ...
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30 views

High side MOSFET Driver component selection

I'd like to drive high side and low side MOSFET for buck converter, so I have used IR2184s,(the image bellow) to do the job, The frequency of oscillation is 1Mhz, so DRVR is a square wave signal of ...
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35 views

Prevent spurious triggering of NodeMCU GPIOs

I designed a simple circuit to control a relay with a NodeMCU micro controller. The NodeMCU polls a remote web service via a simple API and pulls high or low the D1 GPIO according to what it's posted ...
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1answer
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Optoisolated MOSFET to control a load - should I take in consideration MOSFET typical use?

I've already asked a specific question, but I'd like to evolve it in a more general question. In a typical optoisolated IC like this: Should I or not interconnect control (-) and DC (-) or will I ...
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50 views

driving high and low side mosfet for synchronous buck converter?

I am designing an MPPT charge controller. I have chosen my MOSFETs to be both NMOS https://www.sparkfun.com/products/10213 (FQP30N06L) 60V, 30A. Since the gate voltage is 3 to 5V. I can drive the low ...
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Push-pull transistor - input current spikes and advantage over just an npn transistor

I have simulated the following circuitry in LTSpice: Input Voltage pulse characteristics: Questions: 1. What is the reason for the current spikes on the input resistor R2? Do I need to worry about ...
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70 views

nanoPower comparator driving MOSFET not providing expected output

I built the following circuit to charge a large capacitor from a low power source before switching the load: simulate this circuit – Schematic created using CircuitLab MAX9064, MCH3484, ...
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48 views

stepper motor driver heats up

I have this motor driver design set up on a breadboard for a bipolar stepper motor. I was able to drive the motor forwards and backwards for about 5 minutes. I realized that two of the P mosfets were ...
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70 views

Problem in IR2112 use

What is wrong in this connection diagram. I had provided pwm with 20kHz and 5volts. But at the R3 I am not getting results
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driver for IRF840

I want to use MOSFET IRF840 for DC-DC converter application. I am providing PWM signal from PIC microcontroller. I have tried to simulate using IR2110 but it is not working. What type of gate driver I ...
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57 views

PWM Not Driving IRL520N MOSFET

I am trying to switch a IRL520N logic-level MOSFET using a 0-5V PWM signal from my microcontroller (PyCom FiPy). I tested just the MOSFET with a 10 Ohm series gate resistor and my load is a 9-15V ...
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Problem with stacked power mosfet simulation

I'm trying to build a Circuit Lab simulation of a stacked power mosfet pulser as described in this paper. The simulation runs for 10 ms. After 5ms, the switch flips and the voltage at 'StageOne' drops ...
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45 views

How much output current I need for IRF830 Mosfet?

I'm working on a project and i need to switch IRF830 N-Channel MOSFET at roughly 100KHz as low-side.so, how much output current I need to drive this MOSFET 4 in parallel?
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42 views

How does work the trigger/start of this buck converter?

Im watching this video but since its in german I dont fully understand the way it works, specially the startup side with the pulse source and the mosfet. Could someone explain me this part of the ...
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1answer
95 views

N-channel MOSFET not fully OFF

I have this very simple circuit - actually there are 6 of them on a board. simulate this circuit – Schematic created using CircuitLab The MCU is connected to an MCU, and it is used to drive ...
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2answers
74 views

H-bridge design for Peltier

I am using a pelter module to cool a chamber, I also use the same module to heat the chamber just by reversing the voltage to to.(separately tested and working). This lead me to look for a H-bridge IC ...
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1answer
228 views

High voltage nanosecond pulse generator

I am trying to build a PCB based pulse generator that can produce a pulse with a width of about 100 ns and 500V-1000V peak amplitude to a 50 ohm resistive load. I will use the circuit for burst pulse ...
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Rise time and fall time issue in the power MOSFET

In our automated design due to MOSFET obsolete we have changed new MOSFET which gives us rise and fall time issue at the frequency applied from 10Khz to 500Khz. when we use the power MOSFET as Load ...
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76 views

WS2811 LED Strip Driver

I'm in the process of designing a LED strip driver using a WS2811 chip and 3 MOSFETs. I've attached the schematic below. I based it on the reference circuit in the WS2811 datasheet (link), and this ...
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1answer
89 views

What causes random ringing in my inverter?

I'm currently redesigning the inverter for driving my induction heater. While I've sorted out most problems I encountered I'm still struggling with the actual inverter. Picture 1 shows the waveform ...
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1answer
78 views

BLDC controller MOSFET heating problem

I am using schematic to controll a bldc motor without sensors. As gate drivers I am using IR2101 and also I added some diodes in anti-parallel with gate resistors (not shown in the schematic) I am ...
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59 views

Circuit protection problem driving high side MOSFET continuously

I need to drive a high side N-channel IGBT continuously. The circuit is essentially a passthrough, and the only thing I want to do is turn this pass through line on or off (usually if not always on) ...
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129 views

Voltage spikes in h-bridge inverter square wave output

I apologise if this is a repost but I couldn't find the problem anywhere else. I am trying to power an ultrasonic transducer using an h-bridge inverter design to convert arduino signal into a higher ...
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59 views

Is it appropriate to use the TB6621 or DRV8871 motor driver for powering 12V 1 amp motors?

I'm looking to make an Arduino powered rock crawler with 4 motors (want independent control of each wheel, also need to reverse). I'm looking into buying 12V DC motors that seem to have about a 1A ...
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Driver and H-Bridge questions

I have never used an H-bridge before, but now I want to toy around. Reading this document the author uses IR2110 (Datasheet) with IRF840 (Datasheet IRF840), and these datasheets will be my starting ...
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1answer
70 views

Explanation of a sample circuit for the FL5160 Dimmer controller

While looking for dimmer circuits, I stumbled upon the FL5160 Dimmer controller and it's specification at https://www.onsemi.com/pub/Collateral/FL5150-D.pdf The example schematic (for example, the ...
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80 views

What is causing these switching transients on a 3 phase motor driver?

One time I built a 3 phase motor driver, which works quite well in the original configuration. Recently, I changed the physical layout to this rectangular form factor, and now it has quite large ...
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59 views

High voltage switching using N-FET

This is my first time designing a High voltage switch, as come up with some interesting thing that I want to ask about. My application needs to short out a signal line to HIGH, with a 3v3 signal from ...
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1answer
138 views

3 phase Bldc hall sensor problem

I am trying to drive a 350 watt, 3 phase, BLDC motor (DGW07-20j model) with stm32 micro controller. But I have problem with hall sensors because their outputs are not similar to the hall sensors which ...
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110 views

How to determine PWM Frequency of a MOSFET to drive a BLDC motor?

What are the factors determining the PWM Frequency of the MOSFET driver circuit that drives a BLDC motor. Is there any equation for PWM calculation? For eg. I need to control the speed of a BLDC ...
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93 views

Power source switching circuit - 60-80V sources

I have a circuit I'm working on that has two power sources, one varies between 40-60V, and the other is 72V. The 72V power source will typically always be on, and the 40-60V source may be on or off. ...
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374 views

How to calculate MOSFETs gate resistor?

I am using the equation Qg = ig * t in order to calculate the gate resistor which charges the MOSFETs input capacitance (Ciss). The MOSFET I am using is the IRFP4368PBF. So if I use the equation Q=CV ...
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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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57 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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382 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 ...