Questions tagged [gate-driving]

MOSFET and IGBT gate driving

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50 views

voltage divider driving PMOS with slow turn-off time

I have a voltage divider that is driving the gate of a high side PMOS switch. The voltage divider turns the PMOS on once the NMOS is turned on by a 5v logic controller. The PMOS turns on ...
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2answers
102 views

Mosfet gate driver have no direct connection to ground

This picture shows some part of a high frequency (about 250kHz) MOSFET gate driver circuit.I searched for various types of gate drivers in google and didn't encounter anything like this. Can someone ...
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1answer
102 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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36 views

When I use two IR2110 for full bridge, dose supply voltage of IR2110 need isolation?

I found the question that explains logic supply voltage (VDD, VSS) and gate drive supply voltage (VCC) are not isolated. And according to datasheet reference circuit, it seems to be non-isolated ...
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23 views

Why Dspic304011 Controller's PWM stucks to 50% duty cycle when DC link Voltage is turned onn before the gate votlage turned onn in SPWM inverter.?

I have implemented SPWM inverter that take input from grid (230V AC) and convert this to DC link voltage 320V and this DC link voltage is converter to desire frequency. The gate driver IR2136 is used ...
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2answers
2k views

Why is my power MOSFET heating up when on?

I'm switching a 12V 500mA resistive load (LED strip) with a IRF540 MOSFET and it's getting very hot when it's on and conducting. This confuses me as MOSFETs are ...
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41 views

Mosfet Gate Pull-Down and Gate Resistor Failure

I'm trying to make an inverter which has a dc bus of 350V and output of 220V(spwm). The problem is I've run the circuit two times and in the first one the gate resistors explode and in the second one ...
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74 views

Driving of a MOSFET using optocoupler in 180-to-24V buck converter

i have a problem with driving a MOSFET in a converter, let me explain. I need to build a Buck Converter with the following requirements: Input 180 V (From a 120 VRMS rectifier circuit) Output 24 V No ...
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2answers
49 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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2answers
65 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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0answers
56 views

Alternate uses for Gate Driver - Driving a Load without External IGBT or FET

What issues would one encounter by using a gate driver IC to directly drive a load instead of using it to drive transistors? For consideration would be the very affordable Infineon 2EDN752x series ...
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2answers
717 views

IGBT transistor with auxiliary emitter

Recently I discovered, that some IGBT transistors in IGBT modules have the second pin for an emitter, called auxiliary emitter. In the picture above 2nd and 4th pins are auxiliary emitters. This is ...
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4answers
148 views

What is the importance of separate power and logic ground (ie a Vss pin) in gate driver

I have 2 different versions of a high and low side driver; IRS2186 AND IRS2186. I have attached the typical connections, taken from the data sheet (data sheet: https://www.infineon.com/dgdl/irs2186pbf....
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1answer
139 views

Why is it better to use this Opto-coupler to drive the gate of a FET than using other methods?

My question is what significant advantage does using this HCPL3180 opto-coupler have to drive the gate of an FET over using other methods, such as using an op-amp or BJTs ??? and also does it have ...
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46 views

hump on rectified signal and inconsistency on gate signal

Following is the image of my circuit, I am working at the moment. This is not my own circuit but I am trying to understand and work on it. Following is the signal I am getting at Gate2. What could ...
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1answer
47 views

Inverter Mosfet Driving with Isolated Totempole Supply

simulate this circuit – Schematic created using CircuitLab I'm trying to make an inverter and I'm driving my mosfets with totempole configuration, the thing that confuses my mind is: Totempole ...
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0answers
51 views

Sizing the input current of a isolated standalone MOSFET gate driver for a stable output

After a suggestion from my previous question I'm planning to use this Photovoltaic isolated MOSFET gate driver to trigger a trigger input of this DAQ. It seems these devices do not require an ...
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1answer
73 views

What is this spice model? Is it a level shifter? [closed]

Does anybody know what is this symbol in spice? I think this is something like Gate Drive or Level Shifter, but I want to know the exact part name or something like this part.
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1answer
59 views

Using PSPICE model of gate-driver from manufacturer

I have found a PSPICE model for a part I'm interested in. ISL55110 Datasheet: https://www.mouser.com/datasheet/2/698/isl55110-11-1302115.pdf Manufacturer PSPICE Model: https://www.renesas.com/cn/zh/...
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0answers
163 views

Three phase motor driver DC link, DC bus capacitor values

I am designing a motor driver for a three phase brushless motor and have been looking for a capacitor value for the DC bus of this circuit (C1). Most of what I have found when researching deals with ...
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1answer
269 views

Ultrasonic Pulse Generator using Power Mosfet and Gate Driver. Confused about datasheet compatibility

I'm working on a project for University. The goal is to create an ultrasonic flaw detector that can measure flaws within a piece of metal. I have only taken introductory courses in the different ...
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1answer
26 views

Is input current of a gate driver auto-regulated?

I have tried googling, but almost everything I can find on gate drivers discusses only the maximum current parameters. I'm looking at a gate driver for a university project. The gate driver uses 3.3V ...
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1answer
247 views

BLDC Motor rotor vibrates with audible high pitch beep, but does not spin. Controlled by custom motor controller

The circuit I have built (taken from the HIP4086A gate driver data sheet found at https://www.intersil.com/content/dam/intersil/documents/hip4/hip4086-a.pdf) is: The only difference between this ...
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2answers
801 views

What PWM inputs are needed to drive a 3 phase BLDC using the HIP4086 IC driver chip?

I am building a motor controller for a BLDC (w/ Hall sensors) using a Teensy. My circuit looks like the typical application diagram in the datasheet (https://www.intersil.com/content/dam/Intersil/...
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0answers
111 views

Inverter Design - High Side MOSFET - Slow Switch Time

I've posted previously on a similar issue which can be found here Overview: My design is a 3 phase inverter with: MOSFETS are STF10N60DM2 Gate Driver is 6EDL04N06PT I'm using only a single high ...
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2answers
367 views

MOSFET Miller effect: length of the gate voltage flat area

As per Miller effect the gate voltage stops to grow at the threshold level until some certain moment: This can be explained as the drain to gate capacitance drives current through the gate. However - ...
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4answers
667 views

Constant current source with MOSFET, OPAMP and Instrument Amp

UPDATE Based on the information from everyone answering below, I have modified my circuit and the oscillation has completely vanished! I started performing small modifications in order of easiest to ...
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1answer
153 views

High Side MOSFET Driver

I am familiar with the bootstrap circuit and its design procedure. The steps involve: a) Figure out the Qg of the MOSFET at the Vgs you plan to operate (for instance Vgs=15V, Qg=150nC). Next, figure ...
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1answer
135 views

Gate Driver topology for Buck boost Converter

I am implementing inverting Buck-Boost Converter in hardware as shown in the picture attached. The output of this converter is negative. so I will have an issue with its gate driver. The gate driver ...
3
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4answers
304 views

Power MOSFET blew up when increased duty cycle from 5% to 10%

First, these are the components I'm using on my PCB, click on them to see the datasheets: U7: Infineon 1EDI60N12AF MOSFET Gate driver Q6: Infineon IRF250P224 Power MOSFET D5: Fairchild (ON ...
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3answers
437 views

pull-push gate driver for H bridge circuit

To drive power MOSFET following circuits with different pros and cons has been used type A type B type C type c which is called pull-pusher gate driver can used either P or N mosfet in h-...
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1answer
139 views

Need help with troubleshooting an H bridge circuit

I designed an H bridge using the DGD0506A gate drivers. https://www.diodes.com/assets/Datasheets/DGD0506A.pdf I used the FDMC7696 for both high side and low side mosfets. I went with the suggested ...
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1answer
50 views

how to adjust drain bias to keep power dissipation constant (HEMT)

I am reading a chapter in a thesis about using HEMT (high electron mobility transistor) as a cryogenic amplifier. The measurement scheme is to use the gate voltage fluctuation's influence on the drain ...
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1answer
69 views

How can we use the same charge-pumps circuit for varying input voltage?

As I understood it, a charge-pump increases the input voltage by stages Vout=Vin(N+1). In my example, the two stages of charge-pumps, I have Vout=3Vin. So in case of Vin=5.5V this leads to Vout=5.5*(3)...
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2answers
70 views

Ic-Vge IGBT Curve

In the figure below, presented in the manufacturer datasheet, you can see the Ic-Vge curve of an IGBT device. As mentioned, it has been drawn at Vce=20V. What does this equality mean? Can we have such ...
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21 views

drain voltage of JFET (N type depletion)

I am trying to figure out the drain voltage of the JFET (N type depletion) ATF33143, given the architecture shown in the image below. I understand that it's basically a voltage divider and that \$ V_{...
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2answers
125 views

Negative gate SCR

I've accidentally supplied the gate of an high power phase control thyristor (Vdrm=5200V and It(rms)=6500A) with a negative current (about two times the trigger current and four times the trigger ...
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2answers
485 views

What do we mean by “gate plateau voltage”?

While reading some semiconductors datasheets, I've found something called "gate plateau". What do we mean by this term ? Reference: AND8029 application note page 2, from ON Semiconductor written by ...
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1answer
336 views

MOSFET H-Bridge Design - Capacitor/Diode/Resistor Selection

welcome to my first post! I am designing a small 3-phase Brushless DC Electronic Speed Controller (ESC). The design utilizes 3 half bridges and a FAN7388 driver IC. The FAN7388 datasheet has a ...
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1answer
173 views

Can I drive a Low-Side MOSFET from a High-Side Driver?

I'm working on a power electronics project where it involves driving 4 different MOSFETs, (3 HighSide and 1 LowSide). Rather than using a different IC for the LowSide driver, I am thinking about using ...
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1answer
54 views

Tuning a potential sensor using a source-follower MOSFET

I am interested in building a simple but sensitive setup that would allow me to detect small potential changes (adsorption of ions) on the surface of the gate of a MOSFET - what is commonly referred ...
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2answers
180 views

MOSFET bootstrap capacitor

I'm using a N channel gate driver with a bootstrap diode included, so I just need to add the capacitor. The FETs will be powered from a 3S lipo pack (12.6 to 9.0v) so I was wondering if I need 30v ...
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2answers
134 views

Simple Buck/Boost/Other Topologies building tutorials [closed]

For educational reasons, I want to build physical DC-DC converters. I would start with simple buck or boost topology. For start, I wish to have a simple gate-drive for switches, without PWM modulation....
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1answer
97 views

Proper power supply for this gate driver IC

I will use the gate driver configuration shown below: Gate Driver datasheet MOSFET Datasheet As you can see, the 5V and 12V are isolated. I chose this AC/DC converter for the 5V supply. It's 1 ...
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87 views

NCP3420 failing in buck converter

I designed a constant current buck DC-DC super-cap charger with the NCP3420 as a dual MOSFET driver. The current is hysteresis controlled and the disable and PWM lines are pulled low on power-up. The ...
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1answer
253 views

Select bootstrap capacitor value too high

What happen if we choose bootstrap capacitor value too high in high side gate driver applications? Can it be harmful for MOSFET/IGBT or it is just not important?
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1answer
115 views

Gate Drive Resistor size and/or Gate Driver IC

I am working on a design for a 16 channel LED driver design. at the moment the basic design is based on three main components: NCP781BMN050TAG Voltage regulator PCA9685 I2C PWM Driver CSD19534 MOSFET ...
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1answer
109 views

How to match this gate driver to this mosfet?

I've selected this MOSFET for a motor control application [picture attached]: IRF200P222 Datasheet: https://www.infineon.com/dgdl/Infineon-IRF200P222-DS-v01_02-EN.pdf?fileId=...
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1answer
228 views

IRGB14C40L and MC33153

I want to drive a power ignition IGBT (IRGB14C40L), and for this a driver MC33153 has been chosen. I have several questions about my supposed schematics, shown below: 0) This design will (allegedly) ...
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769 views

How can I simulate a Infineon IR2183 gate driver in LTspice?

I'm making a boost converter in LTspice, initially with ideal switches and comparators, but now trying to use realistic components. For the MOSEFT I just picked one from the available ones that has a ...