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 Series FET connected opposite to each other operates? [closed]
Two FETs are connected in series opposite to each other. See the following circuit diagram. I am confused here that when both FETs are turned on, How does it allow current to flow? but in the ...
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Parallel connection of 12 MOSFET [closed]
So I need help to design schematic with 12 MOSFETs with 500 A. Do I need driver for each MOSFET or single driver is ok?
(edit)
For EV vehicle. Need to design a disconnector or isolator board between ...
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How this FET driver works? [closed]
Everyone, please guide me through this circuit. How this circuit is working.
The PACK+ and PACK- pins can be connected to a charger or load terminal. And the BAT+ and BAT- pins can be connected to a ...
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Technical Guide Need for TIDA-010208 [closed]
I am working on BMS using BQ76952 1. But I don't understand about the the attached schematics. Please guid me how the current flows from charger to battery when charger is connected. How the CHG and ...
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Is this circuit suitable for switching 3 kA? [closed]
So I wish to switch a current of roughly 3 kA on for short periods of time roughly every second. I have created a circuit shown below which I believe will be sufficient but after past failures I would ...
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How do you size a resistor when the current and voltage flowing through it are impulsive?
Given a 33 Ω resistor, I need to size the power it can handle. The resistor is in series between a pin where a SPWM voltage is applied and the gate of an IGBT.
In the following photo: blue is the ...
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MOSFET VGS rating with Stepper Driver
I am building a PCB that consists of a stepper motor driver (DRV8711) and had a confusion with the N-Channel MOSFET selection. I will power the driver through a 50V supply and the driver mentions ...
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Transient output voltage on high-side MOSFET switch upon start up
For my application, I am using 4S10P Li-ion battery (with NXP's RDDRONE-BMS772) to power the following load:
8 ESCs to control thrusters
1 Raspberry Pi with hat to control ROV (powered from 5V buck ...
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SiC MOSFET Gate resistor sizing
We have designed a gate driver circuit using the UCC21710 gate driver for our Motor controller, We have chosen a starting value of 2 ohms(OUTH and OUTL or Ron and Roff).
Here is the circuit
According ...
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Simple MOSFET LowSide Switch driver
I want to drive a LowSide MOSFET switch. No switching speed needed here.
With a 3.3V µC input on the driver, the MOSFET shall sink current.
I have a npn/pnp stage here. When µC output is HIGH (3.3V), ...
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Active Half-Bridge Driver Circuit
Consider the folLowing half bridge circuit:
I'm designing a half-bridge circuit to be controlled by a microcontroller. Ultimately, there will be 3 copies of this circuit for an ESC. I am hoping to ...
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How can I identify an IC marked '32D FD'?
I need to find the IC name of this marking number. It looks to me SOT-23 package. It is most probably an FET IC used for PWM dimming control of an LED driver. I am attaching LED driver schematic from ...
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Only using low side of high/low mosfet driver - can I leave the high pins disconnected?
I have the below circuit for a high/low mosfet driver half bridge, with an extra low side for running a brake resistor (note this is just one of the 3 half bridges for the BLDC controller)
I'm using ...
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Pushing a button press from a driver to three different transistors with three state logic
I am working on a project within my company that involves a relay board used to control three different motors when an external 24 V button is pressed. The existing setup works based on this principle....
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How to add an offset to a PWM signal to control a N-channel MOSFET that has a large source voltage?
I want to control a N-channel MOSFET through a PWM signal generated by an Arduino board. The amplitude of such PWM is 0V-5V with respect to GND with frequency 20kHz.
My idea is to send the PWM signal ...
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Noisy signal output from BD2320 MOSFET driver
I need help or technical solutions relating to this issue I encountered with BD2320.
I intend to use two BD2320 drivers for an interleaved buck converter. One of the channels works well, but after ...
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PWM is not controlling the fan, voltage drops | ESP32 4-pin fan driver
I'm know only a little about electronics but I had a try to create a driver for 2 120 mm fans (3 W*2). I have PNP, NPN BJTs and N-channel MOSFET IRF3205 which requires 4 V at the gate to be triggered. ...
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Please help me identify 12 V LED lights driver
I have a set of eagle lights LEDs for motorcycle and the chip that has BOF2801 is the one burnt up. And as far as I can find out I believe it’s an led driver of some sort but can’t find anything ...
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Choice of elements for the MOSFET driver (circuit)
Requirements:
600 V, 100 kHz (full-bridge)
MOSFET driver L6388E
MOSFET - Datasheet
Driver circuit (half-bridge):
PWM digital isolator circuit:
Questions:
Cboot is used to power the top transistor. ...
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18650 battery concurrency
I would like to build a small circuit with a photoresistor and relevant ICs that switches a larger circuit that enlights Leds utilizing about 1A from a 18650 5V power bank of new batteries. How safe ...
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What exactly is wrong with this mosfet switch circuit?
Ok I thought I had mosfets figured out, at above 10V they were on (for my piece) and at 0V they were off, why isn't V2 (green) putting out the same waveform as the switching source (V1, blue)? I even ...
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Half-Bridge with N-channel Mosfets and IR2101
I am building a half-bridge with IR2101 as half bridge driver and I am being confused by something in the datasheet of IR2101. My main supply voltage will be 40V. The VCC of the IR2101 will be 15V ...
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Bad turn off signal for mosfet
Currently, I'm designing Zeta Converter for my projects and I made this design.
When there is no supply applied to the zeta converter, the PWM signal seems good.
But it ends up getting a bad turn-...
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Gate spikes in half-bridge IR2110 driven
Some time ago I posted a question about weird oscillograms of half-bridge, gate spikes on mosfet openings. After some investigation, it was revealed that the problem is not in transformer leakage ...
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Do I connect grounds on a 4-pin MOSFET with kelvin source?
I have a 4-pin MOSFET with two source pins. One is for the driver source (the so called kelvin source) and one is for the power source (the normal one you'd find on any MOSFET).
I've got a driver to ...
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MOSFET Switch for LED
I want to use this circuit for my LED. Can someone explain to me how to choose the right value for Rin and Rgs? It would help if you explain that with the equation.
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VOM1271 as isolated power supply for gate driver
When looking for a gate driver to drive a FET with 65nC gate capacity at 10V with a frequency of 100 Hz I found the VOM1271. Unfortunately it seems like with such a high gate capacity it is impossible ...
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TC4422 output doesn't go low
I'm trying to test a TC4422 mosfet driver with a simple circuit shown below. Input is a 1kHz square wave 10 Vpp.
For some reason the output across the 10k resistor stays high all the time (~VCC) no ...
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select the proper HALF-BRIDGE DRIVER for DC motor application
I was looking for a HALF-BRIDGE DRIVER for my H-bridge and BLDC motor projects, however, I found most of the MOSFET gate drivers are two types
One has SD (Logic input for shutdown) and IN (Logic input ...
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Half-bridge oscillogram spikes, possible shoot through
I built a half-bridge smps based on IR2110S, it is working but the oscillograms seems weird and mosfets are a little hot.
LOW side mosfet Vds.
Two oscillograms, mosfets midpoint as oscilloscope ...
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Using a Relay Driver with SRD 3V Relay
Short Version: How to connect (Which Terminals Go Where) the following two components
DRDC3105 (A relay driver)
SRD 03VDC SL C (A 3V relay supposed to control the flow of 230V AC and controlled by ...
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Does a gate driver sink more current due to the Miller Effect?
I have a MOSFET (G2R1000MT33J) that is switching 1000V. When I switch the MOSFETs at a high frequency with no Vds voltage, the gate driver can handle the thermal load of the switching, but when I ...
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What is the purpose of connecting the series capacitor to the low side P- channel MOSFET gate?
The datasheet describes CAOUT as a decoupling capacitor. Not sure how it is so ?
My guess on the working of the circuit:
When AOUT is high, CAOUT is gradually charged with +(on left) and right ...
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Gate pulse distorted on connecting to MOSFET Gate
I have a circuit consisting of multiple power MOSFETs (IRFP460), which need to be switched in a particular sequence. I am using an FPGA to generate the gate pulses (15 V), and connecting that to the ...
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How does this gate drive circuit work?
This circuit is taken from page 6 of this paper by Bruno Putzeys. It is used as a gate drive circuit in a self-oscillating class D amplifier.
I am having a hard time wrapping my head around how it is ...
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LTC7000 IC Iset pin broke in some way
I have a LTC7000 IC schematic like below. IC fault pin show around 10V and its fine. I can turn on and turn off mosfet at least 3 or 5 times. I can turn off mosfet under without current and after that ...
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How to disrupt one power rail if another is connected for powering ESP32?
I'm trying to make a DIY ESC with an ESP32. The problem is that, my ESC has 2 power inputs:
With an XT60 that powers the mosfets and motor + the ESP32 through a switching buck converter to 3.3V
From ...
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P-channel MOSFET switch is broken in high voltage
i want to use a mosfet switch 30V voltage
the motor operates when the temperature is high
before this circuit i changed R9, R10
R9 -> 4K7
R10 -> 680
and MOSFET was broken
so i changed R9, R10 ...
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Protection for PMOS VGS rating
I am using PMOS as a switch to control 24V to deliver to load. When MCU drives the NMOS it is suppose to pull the PMOS gate to GND and turn-on so that load can get the 24V. This is what expected as ...
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Why does this multi-phase buck controller have one phase to be driven by external driver?
https://www.renesas.com/in/en/document/dst/isl62883-isl62883b-datasheet
"The ISL62883 uses two integrated gate drivers and an external gate driver to provide a complete solution"
Why would ...
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Why is one of the high side MOSFETs heating up in the inverter design using egs002?
I am totally new to electronics and so I don't have the tools and knowledge enough to troubleshoot this problem. I am attaching a picture of the schematic.
When I power up the circuit using a bench ...
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The resistor is over heated in my totem pole circuit
This is my totem pole circuit:
It works well, but R32 is too hot.
This is scope:
I changed R32, R34to 470 ohm, but I got the same result:
I think the resistor value is the problem. How can I fix ...
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Placement of Flyback diode
In the MOSFET switching application of an Inductive load, I have a question.
Why can't we place the flyback diode in a position as shown in the above image?
Why can't it be placed across the MOSFET so ...
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Which should be powered first: MOSFET driver IC (Vdd) or MOSFET bridge (Vin)
I have this MOSFET driver IC.
The application circuit mentions powering the Vdd of the driver first and then only the Vin, but I did it in opposite. I powered Vin first and then Vdd. This resulted in ...
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What is the purpose of 100 kΩ resistor between gate and source in MOSFETs?
I've seen many MOSFETs where there's a 100k kΩ resistor between gate and source of the MOSFET.
Can someone tell me what the reason is and how important the value is?
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Vin and Vdd MOSFET driver
The user guide of this MOSFET driver states to turn on VDD first (power to the MIC4606), then VIN (the bridge bus voltage).
However, the datasheet shows a block diagram of a typical application ...
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MOSFET driver not working
I'm having an issue with the MIC4606-2YML evaluation board.
There is no voltage waveform at the load side output connector during operation.
The bus voltage, VBUS, is at 24 VDC and the VDD voltage to ...
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Single-NPN driver for an N-channel MOSFET
After years of neglect, I have just got back on track in my journey of learning electricity and electronics, and I am now considering the building of multiple projects to which MOSFET gate driver ...
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Why is the current limited to 0.8A while switching this inductive load?
How can I increase the current in this setup? I tried increasing the gate on pulse and the inductance (L) but couldn't achieve a higher current. Any other suggestion on this?
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MOSFET Driver, Synchronous Buck vs. Synchronous Boost
I am trying to understand the difference between synchronous buck MOSFET drivers and synchronous boost MOSFET drivers.
I have a full bridge converter which can also only be used as buck or boost.
I ...
