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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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292 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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39 views

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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42 views

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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397 views

how to design circuit of high side MOSFET switching with bootstraping and mosfet driver ic?

Hey im starting to learn about MOSFETs at my university classes, but Im having trouble trying to design a circuit for a buck boost converter for a MPPT solar charge controller. The part pushing me ...
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71 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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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
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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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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635 views

33883 H-Bridge Driver IC Intermittent Switching

I am using a NXP (freescale) 33883 H-Bridge gate driver IC to drive a simple H4 bridge circuit which is connected identically to that in the application schematic in the datasheet: I am switching at ...
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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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564 views

P-Channel MOSFET gate protection

I'm controlling a P-Ch MOSFET on a circuit, VIN is 8-30V TTL_IN is a 0-5V signal generated by a MCU, which can source/sink currents up to 15mA Zener Izt 5mA (BZT52C15) MOSFET Vgs limit 25V I'm ...
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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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270 views

P-MOSFET Dropper-Switch - Linear Region

I'm repairing an ECU board from a SCANIA generator. It works with 24Vdc, and on the last maintenance the technician powered it with 220Vac, so it blew up some components. I've managed to replace the ...
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321 views

Half H Bridge VGS too high

I'm trying to drive a capacitive load with P and N mosfets in a half H bridge. The problem is that my control voltage is 1.8V, and the H bridge is switching 20V. My original plan was to use npn's to ...
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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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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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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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1answer
469 views

IR2101 cross-conduction

The IR2101 is an high and low driver typically used to drive MOSFET half bridges. On this blog, it is said (IR2110 is almost the same as IT2101): "IR2110 can't be used to drive both high-side and ...
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1answer
518 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 am not able to get the voltage at its output pin. The circuit can be ...
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1answer
106 views

Simplest phase-shifted gate drive for two mosfets

I have two inverters, driven by two IRF530 mosfets. I need to drive them with a specific phase shift. What is the simplest, most basic way to do it, for simple prototyping? (I am neglecting PWM ...
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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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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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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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36 views

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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58 views

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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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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97 views

3KW SR motor gate driver and simulation questions

I'm designing power electronics for 3-phase 3KW SR motor by using power MOSFETS of rating 600V. To drive the gates of these MOSFETS, I'm using IR2183 gate drivers, one per each phase. The DC voltage ...
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1answer
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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Difference between IRF520 and IRLZ44N?

I wan to dimmer an halogen lamp 12V DC 20W with PWM from Arduino Nano (3.3V). I was using an IRF520 Mosfet then a guy advice me to use an IRLZ44N, but didn't explain me why. I've tried to read the ...
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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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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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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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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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1answer
105 views

Switching voltages with demux and switches

I am trying to design a circuit that, depending on a value that a microcontroller recieves (between 1 and 10), a fixed voltage of 20 V, 40 V, 60 V,... or 200 V (depending on the value recieved by the ...
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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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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
79 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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1answer
244 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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106 views

2EDN mosfet driver burns out when connected to PWM signal

Good day everyone, I am building a motor controller for a 250W DC motor. Today I was testing a part of my design, but somehow the MOSFET driver did not work. The Arduino send a 50% square wave (4kHz) ...