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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2answers
48 views

Single NPN or NPN+PNP (push pull) to drive a P-MOSFET

I need an ESP32 to drive two p-MOSFETs (https://datasheet.lcsc.com/szlcsc/1808131746_Diodes-Incorporated-DMP2104LP-7_C260933.pdf) as PWM controlled output for a motor. As the ESP32 can not deliver ...
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17 views

VDS Fault on A4964 BLDC motor Driver

I am actually designing a BLDC motor control unit with the A4964 Driver. I made the design for working on 24V supply. I did severals test and HW/SW modification but unfortunaly, the motor won't run ...
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1answer
77 views

H-Bridge shoot through at high voltage problem - Don't know the cause

I have this H-bridge circuit The circuit is for driving a 180VDC motor, it is built to taking in the High Bus voltage from 169VDC to 340VDC. it works with no problem up to 310VDC. However, at 340VDC, ...
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46 views

Unwanted mosfet turn on and irregular duty cycle when driving with IR2110 how to fix?

I am designing an MPPT charge controller and testing all the different components. At the time of writing I am testing the buck converter. During testing, I used a 10 ohm load instead of the battery ...
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2answers
40 views

LED Strip / Resistor Heater + Driver Circuit

For my astrophotography equipment, I need to construct a dew heater and a flat field generator. A dew heater is simply a bunch of resistors connected in parallel such that each resistor outputs about ...
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1answer
41 views

Electrical Switch for LED’s (Providing enough MOSFET gate voltage)

I am designing a circuit to independently control (ON/OFF) up to 8 LED strips. So 8 independent channels The LEDs are of a single color (Not RGB). LED’s are also rated 12V. The controlling signal is ...
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1answer
24 views

Parasitic Source inductance and switching Mosfet

simulate this circuit – Schematic created using CircuitLab Consider the above circuit, (the values are not correct). When I want to turn off the MOSFET, the output of the driver would be 0. If ...
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1answer
81 views

High side MOSFET driver with transformer

I am reading the application note " Fundamentals of MOSFET and IGBT Gate Driver Circuits" written by Texas Instrument. In order to control High Side MOSFET, the application note suggests to use this ...
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3answers
156 views

AC Coupled Gate Drive circuit

Here is the Following circuit : I don't know how the application note can assert that the voltage after the capacitor is equal to Vdrv-Vcl or -Vcl according to the driver output as there is a ...
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2answers
47 views

Isolated MOSFET gate driver VCC and VDD power suppl

I am planning to use UCC21520 for HV SiC MOSFET based full bridge design. My operation frequency would be around 100kHz. I selected UCC21520 in order to achieve the isolation between the power and ...
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80 views

Mosfet Driver IRS2007 failure when running with mosfet IRFB3607

I am designing a BLDC motor controller and facing some issues with using an IRS2007 along with IRFB3607. For one phase, the high side and low side give clean wave forms as long as V_Pow is ...
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2k views

Why does my MIC4605 keep blowing up?

I'm trying do design a mini-PCB, replacable half-bridge for motor control applications. The primary application is to use it with my modular inverter/BLDC/BDC controller. The controller design assumes ...
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2answers
570 views

Why are always used N-Channel MOSFET on both High and Low side on BLDC applications?

As title, I always see an N-Channel MOSFET on both HIGH and LOW side of a 3-phase BLDC motor driver. i.e. Can you explain me why is better to use 6 n-channel instead of 3 n-channel and 3 p-channel? ...
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82 views

IR2110 driven mosfet H-bridge not working properly

I am using this below H-bridge circuit for wireless power transfer. As seen it uses 555 to generate square wave of 50% duty cycle and adjusted to generate frequency of 140 kHz. Clearly, Driver1's Hin ...
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1answer
56 views

Why turn-on speed of a MOSFET is linked to diode reverse recovery time

Here is a quote from section 3.4 "Speed-Enhancement Circuits" in "Fundamentals of MOSFET and IGBT Gate Drive Circuits" written by Texas Instruments: When speed enhancement circuits are mentioned, ...
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1answer
119 views

Driving MOSFET/IGBT - Why Miller Plateau is a plateau?

I'm currently trying to understand what the Miller plateau is: what the different parameters that influence the Miller plateau are, when it begins, and when it ends. I'm reading document "Fundamentals ...
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18 views

Simple Synchronous Rectification of Unidirectional Motor?

I'm trying to drive a high current, low voltage motor (24V 100A cont.). It previously used a very large and overpowered H-Bridge (16 FETs). The system only can rotate 1 direction, and is required to ...
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42 views

Why cascode is not used often as a power switch

Say, we are building a synchronous buck and we have some beefy 600V 10A MOSFET, but it is not really suited for high frequency application - we need to be aware of dv/dt limits and it is hard to ...
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39 views

Can someone explain this high-speed P-channel MOSFET drive circuitry?

I found this circuit in an application note on P-Channel Power MOSFETS. The note explains that modern technology has made it possible for P-Channel MOSFETS to approach N-Channel performance in power ...
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1answer
57 views

Why is this solenoid valve consuming so much power?

The circuit below drivers a pump and a valve, the pump works fine, the valve consumes much more current than I'd expect. The valve is rated 2W at 12V (600mA) i'm more like 15W. The PUMP_DRIVE signal ...
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57 views

Si8234 PWM with “disable” pin

in the datasheet of the Si823x family of gate drivers, the Si8234 is mentioned as being a high-side/low-side driver with PWM input, but actually this "PWM" input pin is only there for switching ...
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27 views

Using Single isolated DC-DC converter for multiple opto-couplers in same circuit

I need to drive 4 MOSFETs with PWM of certain set frequency, whose outputs are connected to batteries. These 4 batteries are in series. I need to isolate input and output. Can I use a single Isolated ...
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29 views

High Side - Low Side Driver selection

I'm currently using a pair of IPT015N10N5 FETs in half bridge configuration, to drive a motor. The FET gates are driven by a UCC27211A-Q1 High Side/Low Side driver. I'm thinking that this particular ...
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65 views

Dual MOSFET Switch Circuit not switching

I'm trying to switch a high-current, 12V load (large parallel LED strip, with the anode connected to LOAD-) using a PWM chip. My approach right now is to use a ...
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1answer
74 views

why the voltage at the gate terminal is 1.8V irrespective of the 3.3V pull up? [closed]

[![the output of my GPIO is 1.8V which is pulled up to 3.3V using a 4.7K resistance and that gpio is connected to the gate terminal of a P-channel mosfet, when i measure voltage across the gate ...
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1answer
80 views

How can this PWM converter circuit be improved?

This circuit is intended to use a 1-10Hz PWM signal as input and produce a 1-10kHz 10A PWM output. It will be used for controlling the speed of a water pump: GP1352 The PCB will be ordered with (only) ...
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1answer
55 views

Driving a TC4428 using PC817

I want to drive a mosfet using a mosfet-driver (TC4428). The frequency of turning on-off of mosfet is 5-10 Hz (yes Hz) and duty cycle is 10-20%. I use PC817 as ...
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2answers
46 views

MOSFET Driver increase maximum duty cycle

I have a piece of test gear I am working on designing, in which there I need to drive a number of N channel mosfets, (3 high side, 2 low side) I found there is a very large range of gate drivers ...
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644 views

Is it better to use a MOSFET with a gate driver IC or a MOSFET with a lower VGS,on?

I am building an RGBW controller for my room. I will be using an ESP32 with four MOSFETs for each channel. I want to know which is best for fast switching. Do I need to use a MOSFET driver IC such as ...
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70 views

Half H-Bridge Control

I need to control a Half H-Bridge circuit to move a DC motor on both clkwise and ctrclkwise directions. I've tested the following circuit: It worked as it was supposed to: when the digital input ...
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1answer
35 views

is it necessary add snubber network for a SSR made by mosfets?

I am designing a control circuit for AC/DC loads. To achieve this, I am using a SSR made by mosfets https://datasheet.lcsc.com/szlcsc/Vishay-Intertech-LH1546AEF_C142599.pdf However this is not a ...
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2answers
295 views

Half H-Bridge Driver

I'm working on a project to control power sideview mirrors in a car, with features like TildDown, that tilts some of the mirror down helping to park. The circuit is pretty simple, but I'm having some ...
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59 views

Buffer-cum-Level shifter using dual MOSFET

I am putting together a Buffer-cum-Level shifter using dual MOSFET to deal with PWM signal for display backlight control. This 3.3V PWM signal is driven by MSP430G2452 and would be reaching the ...
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2answers
58 views

How to use a MOSFET driver directly to drive DC motors with PWM?

I need to control a DC motor runs at 9v with PWM signal 3.3V vpeak. I found MOSFET driver noninverting MCP1401. Can this MOSFET be used directly with a Back EMF diode (diode as usual across the ...
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2answers
78 views

BJT to aid switching a MOSFET

I am trying out the following circuit, I want to use the Arduino so that I can more easily program pulses to drive my load. I was previously using a function generator (FG), but for some reason it won'...
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1answer
50 views

Measurement of Quiescent Current and Operating Current in Gate driver

In datasheet they have provided two parameters named Quiescent Current and Operating current in which I am measuring quiescent current i.e, ground current flowing from the device VDD to GND , when ...
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3answers
130 views

IGBT Gate driver sink or source current

I will drive a load low side with IGBT. IGBT gate-emiter (Threshold) voltage will be 12 V. This voltage level is enough for my load current. I will use a gate driver. When ı search gate driver for ...
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66 views

Driving Parallel Mosfets

I have a total of 20 IRF3205 mosfets in a H bridge configuration for switching a transfromer to get pure sine wave output. (Five mosfets at each end of thr H bridge). Datasheet says total gate charge ...
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120 views

Driving a piezo speaker at 40 KHz

I'm trying to drive this piezo element at 40 kHz but am running into troubles when using a function generator since the element requires greater drive. I got the guts of an ultrasonic cleaner to ...
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1answer
36 views

High/ Low level output voltage in gate driver datasheet

Gate driver datasheet mentions about VOLL and VOH with test conditions Iol=100mA I am testing this using this setup by calculating value (ron of pmos is 7.05 ohms) of load to be placed, Is this ...
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64 views

Propagation delay and its measurement in datasheet

I am referring to Gate driver LM5102 Here the terms are bit misleading 1] Lower turn off propagation delay 2] Turn on delay But application curves uses different measurements symbols(tp/tdl)/...
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98 views

IR2101pbf Multisim simulation problem

I am trying to drive 2 MOSFETs (high and low configuration) to drive a 10 ohm load and there are 2 problems I am facing. When putting both HIN and LIN pins to 12V (High), the output is around 7 Volts ...
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139 views

Problem driving MOSFET with ACPL 337J optocoupler

I want to drive a mosfet. I am using an ACPL 337J optocoupler to drive it. Here is the schematic:- But I am facing problem while driving the mosfet. The signal at gate of mosfet should be a PWM but ...
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1answer
231 views

Why this H-bridge with only N-channel FETs didn't work?

Based on this answer here in StackExchange and the Motorola article it cites, I've designed a dual h-bridge motor driver with push-pull transistors to switch the FETs faster, layed out a PCB in KiCad ...
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1answer
53 views

Half Bridge Inverter Effect of Load on waveforms

I have made a half bridge inverter, in the lab and on simulation software. I have used the gate drive IR2110a and am supplying it with a square wave pulse and it is then applying the gate voltage to ...
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1answer
39 views

Values of components in ACPL 337J

I was going through datasheet of mosfet gate driver. I wonder why is the value of component the specified one only. On page no. 13 fig 23, why the value of resistor between pin 3 and pin 6 is 10k ohm ...
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1answer
49 views

How to find Gate charge

I want to drive a 650V 21A SiC mosfet at 100kHZ. Would this mosfet driver be able to drive the mosfet? How can I find Gate charge of the mentioned mosfet gate driver? The mosfet I am planning to ...
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90 views

In building an electronic load with a mosfet and op amp. It adds some benefit to use a mosfet driver IC?

I´m building an electronic load following this schematic. My op-amp is an LM358 or LM324. My mosfet can be an IRFZ44N, and STW45NM50 or a IRFP460. Those are the parts that are in my bin. My ...
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72 views

Question about a mosfet driver gate resistor

I'm considering the ZXGD3003E6 for driving an N-channel MOSFET - PSMN4R5-40PS,127. There is a typical application schematic in the MOSFET driver datasheet (as shown below). My question is how do I ...
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3answers
334 views

High Side Switching Inductive Load with MOSFET

I am attempting to make a PCB that high-side switches an inductive load (water pump) that draws 4.6A peak. The switching scheme will not include any PWM, just basic on/off functionality. My concern ...

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