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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32 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
39 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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58 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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73 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
25 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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42 views

Propogation 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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20 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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85 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
127 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
36 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
34 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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46 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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71 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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2answers
60 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
101 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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50 views

Can MIC4102 be used to drive Boost Converter

I'm trying to design a high-power Buck-Boost converter, which is meant to convert a 45-63V input voltage into a "constant" 48V. The application requires quite high currents (up to 20A continuous). The ...
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31 views

Cross conduction in class-B power amplifier

can someone explain me why in this class-B power amplifier circuit, those two signal(driver?) mosfet generate a lot of cross condution ? the two mosfet i used : 2N7002 and BSS84 Thank you in ...
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1answer
137 views

Why does this Mosfet get Hot?

I have an IRF740 mosfet that doesn't get hot in one circuit but then gets completely hot in another identical circuit and for the life of me can not figure out why. Well the circuits aren't exactly ...
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1answer
179 views

Problem driving IPB065N15N3G MOSFET with HCPL-316J driver

I want to drive an IPB065N15N3G MOSFET. I am making a boost converter. The driver I am using is the HCPL-316J (a combined optocoupler and driver). Below is a picture of my schematic. Please tell me ...
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62 views

Gate driver circuit stuck

I am trying to design a gate driver for mosfet using HCPL-316J in LTspice. Schematic .zip file. In the zip file the name of schematic is "Main_schematic". Other two are libraries for the components ...
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1answer
62 views

Transformer and MOSFET combination not working

I am working to understand the circuit of a vibrating needle used in factories to scratch a mark on a soft surface. Essentially, this circuit drives a MOSFET bridge which then drives a Transformer. ...
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1answer
41 views

Current source for high current LED driver- 24Vdc/max:16A

I am working on designing a current source for a LED driver, which can work up to max:16A, as long as stays On less than 500msec. Actually, the leds circutry is a Dome-light which is divided in 4 ...
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2answers
46 views

Internal structure of TLP250

Does anyone know what is the internal structure of TLP250? Like how the connections are done inside the IC?
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1answer
63 views

Problem with mosfet driver circuit/switching

I have the following driver circuit used for switching very high current n-channel mosfets Here's their datasheet https://www.littelfuse.com/~/media/electronics/datasheets/discrete_mosfets/...
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49 views

CircuitLab simulation of 555 timer - OUT HIGH always delivering 5V irrespective of Vcc?

I've scratched together a design for a 555 timer based driver for an IR540 MOSFET. But in CircuitLab the simulator shows the 555's OUT voltage is always 5V when high, for Vcc ranges 3.3V through 24V. ...
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35 views

Reverse voltage protection for TBD62083

Good day everybody. This is my first question on this site so bare with me :) . I am working on general purpose driver using TBD62083 (replacement of darlington array ULN2803). As you can see the ...
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84 views

Driving LED with an N-Channel MOSFET

I am driving a red LED with a forward voltage of approx. 2V as shown in the picture. The driving signal comes from a microcontroller with a logic HIGH of 1.8V. The LED is being sourced from an ...
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1answer
118 views

How to speed up level shifter?

I have a level shifter that uses a transistor to control the gate of a high voltage P-channel MOSFET, like this: simulate this circuit – Schematic created using CircuitLab This is designed to ...
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57 views

Multiple devices on 1 battery

My current project is a green lantern minigun prop. I 3d printed it already, im just working on the electrical end of things. I have a 12v drill motor that im using to spin the barrels. also in that ...
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1answer
38 views

IR2101 high side internal structure

Can anyone explain to me what is the logic behind high side RS flip flop, pulse generator, pulse filter from IR2101 internal structure picture ? The input circuit is easy to understand and also the ...
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3answers
94 views

IRFZ48 N and FAN7392 MOSFET Switch

I want to make a MOSFET switch to drive a 12 V 300 W heat bed. Instead of buying one, I decided to make myself one. I used IRF48N MOSFET and FAN7392 Mosfet driver to make circuit and when tested it, ...
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49 views

Problem analysing MOSFET circuit

I have a question regarding the following circuit: simulate this circuit – Schematic created using CircuitLab This circuit gives 30V to the output when the clock input is HIGH, and gives near ...
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2answers
107 views

How can I safely drive a relay OR sense a switch from a single terminal?

I am designing a device that uses an MCP23017 running at 3.3V to either check a "port" on a terminal strip as an input from a motion sensor or drive a relay/SCR/indicator from the same "port". I'm ...
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34 views

High side mosfet-driver circuit configuration for current bypass

I'm designing a current bypass bms and having trouble switch mosfets between calls When i connect the high side gate drivers and simulate with Proteus the overall voltage appears at the topmost cell ...
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1answer
34 views

GAN FET gate current requirement

I'm looking for advice in making sure the FET driver I've chosen is capable of driving the FETs I've chosen with turn on time as low as possible. I'm going to use the LMG1210 and EPC2020 with 12V ...
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1answer
64 views

Why does the current in MOSFET have a quadratic function (explain logically without using the integration method)?

The current equation relating Vds ,Vgs and Vt is already known to us ,but if there is any way we can find out how it varies quadratically without using the formulae?
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79 views

Understanding mosfet drive voltage

I am planning to work with this N-mosfet - SiSA72DN Max ratings: Specs: Does this mean: I need to apply a voltage > 2.4 V on the gate to turn it on fully and the applied voltage must be < 20 V? ...
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2answers
47 views

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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1answer
76 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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2answers
142 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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2answers
43 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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1answer
55 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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1answer
113 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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87 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
64 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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2answers
54 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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82 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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53 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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57 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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85 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 ...