Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [gate-driving]

MOSFET and IGBT gate driving

1
vote
1answer
33 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 - ...
0
votes
0answers
40 views

Under voltage protection with schottky diode, bad or legit idea?

I'm working on a design where I in simulation have discovered that I probably will have problem with to much negative Vgs, so I firstly tried to find a zener diode that could combine both OVL and UVL ...
5
votes
4answers
121 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 ...
0
votes
0answers
52 views

MOSFET Gate resistor in discrete NMOS Logic Gate Design

TL/DR Short version of the question: I want to construct discrete logic gates from a lot of BSS123 MOSFETs. Can those MOSFETs drive each other without the usage of gate resistors without damaging the ...
-1
votes
1answer
57 views

Gate driver for Mosfet PWM switching

I am designing a lead acid battery charger using Battery University for guidance. This is the circuit I made. At the input, I will be connecting an SMPS rated for 12V 15A, which will be adjusted ...
1
vote
1answer
92 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 ...
0
votes
1answer
36 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
votes
4answers
188 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 ...
0
votes
1answer
101 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-...
0
votes
1answer
55 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 ...
0
votes
1answer
45 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 ...
1
vote
1answer
53 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)...
0
votes
2answers
31 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 ...
0
votes
0answers
13 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_{...
0
votes
0answers
29 views

What causes my inverter voltage to be weired (TL494)

while trying to build my first switched mode power supply, I have come across a problem which I have no explanation for. "https://imgur.com/a/aveN1G5" Picture one shows the waveform on the inverter ...
0
votes
2answers
60 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 ...
0
votes
2answers
84 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 ...
0
votes
0answers
50 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 ...
0
votes
1answer
48 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 ...
1
vote
1answer
47 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 ...
0
votes
1answer
61 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 ...
0
votes
0answers
70 views

Why the gate driver output current is zero amps

I am working on 3-phase inverter circuit. I am using IR2110 to switch high and low side MOSFETs. Each MOSFET's gate is connected to the high/low side pins of driver IC. When I apply the PWM input to ...
0
votes
2answers
87 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....
0
votes
1answer
93 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 ...
0
votes
0answers
46 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 ...
0
votes
1answer
77 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?
0
votes
1answer
79 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 ...
0
votes
1answer
68 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=...
0
votes
1answer
102 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) ...
0
votes
0answers
100 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 ...
0
votes
0answers
30 views

How can I drive a bridge with three states and two high-side switches?

I want to drive a configuration similar to the one presented in Figure 1 of A novel tri-state boost converter with fast dynamics, but use a MOSFET instead of the diode for efficiency. I want to put ...
0
votes
0answers
59 views

multiplying PWM signal

I have a 36 mosfets to drive them with a microcontroller (of course not all at the same time) and a gate drivers but i'm trying to figure out a way on which i minimaze the number of gate drivers as 36 ...
1
vote
0answers
50 views

Logic gate directly driving power MOSFET

Art of Electronics, 3rd Ed, pg. 164-165 give an example of naively using a 4000-series CMOS logic gate to directly switch a power MOSFET, disregarding the significant gate current required to charge ...
0
votes
0answers
50 views

How to calc isolated DC-DC rating for Gate Driver which drives 5 MOSFET in parallel?

I am Kalpesh. I am using FOD8316 gate driver to switch IRFP4668 MOSFETs and the DC-DC used for FOD8316 is MGJ2D121509SC which provides +15VDC/-8.7VDC output vtg with current rating of 80mA/40mA ...
1
vote
1answer
83 views

Battery management system for my battery packs [closed]

I'm working on battery management system for my battery cells. the topology is based on inductor energy transfert from the higher charged cell to the lower one in order to balance and equalize the ...
1
vote
2answers
91 views

What does “max” really mean in gate trigger threshold of a triac?

I am trying to understand the parameter Vgt (max) for a triac (or any semiconductor with a gate threshold parameter), mainly the max. part of it. For example, on page 2 of the following datasheet: ...
0
votes
0answers
26 views

Simplest implementation of LM5046

What is the simplest way to implement LM5046 in order to run two MOSFETS, where second MOSFET is 0.083us delayed?
0
votes
1answer
40 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 ...
0
votes
0answers
160 views

MOSFET high side gate driving without driver

I'm building an H bridge form IRF3205 N MOSFETS to drive a TX coil for Wireless power transfer. I want to make the high side switching without a driver, instead I'm using a somewhat similar bootstrap ...
0
votes
1answer
80 views

GTO Driver circuit

i am new to power electronics.I am working in project where input is pulsating dc and i have to control it, i try with scr but we can control only on of scr not off so in some case the cycle cut ...
2
votes
1answer
188 views

E.V. Motor Driver (DC). How to protect parallel MOSFETs and the driver?

Overview: I have an electric quad that I have heavily modified. The motor will need to be replaced every now and then because I am driving a 48 volt motor with a 72 volt supply that can give extremely ...
0
votes
1answer
252 views

High side N channel gate driver

So I realized with the suggestion in the comments that there is a much better solution to driving a higher voltage H bridge than using transistors or secondary mosfets and zener voltage. I have ...
0
votes
0answers
47 views

Why Fault pin of IR2136 gate driver is getting low at high voltage?

I am implementing a variable frequency drive for a three-phase induction motor. I used IGBT module fs25r12w1t4 with gate driver ( three phase, six Channels IR2136). When I increase the voltage, the ...
0
votes
2answers
138 views

Combining two PWM outputs for finer granularity

Follow-up to: Is it okay to use a MOSFET in its resistive region with a heat sink? I plan to use two PWMs to very slowly (exponentially) turn on an LED strip, from 0.002% to 0.004%... to 100% power ...
15
votes
6answers
3k views

Is it okay to use a MOSFET in its resistive region with a heat sink?

Using transistors in with limited gate (or base) voltage will make them limit current, which will introduce a significant voltage drop across the transistor, causing it to dissipate energy. This is ...
0
votes
1answer
383 views

Gate driver IR2110 problems

I want to turn on and off both the mosfets at same time and I used IR2110 gate drivers for high and low MOSFETS. When I try to simulate the circuit, after few seconds it shows error saying time step ...
1
vote
1answer
536 views

Why is my gate driver simulations are taking very long?

I want to turn on and turn off two mosfets from the asymmetric H bridge which is connected to SR motor at the same time. I'm using IR2183 gate driver. The circuit connections from LTspice are show in ...
0
votes
2answers
91 views

Half-bridge gate–drive IC issue

We have designed a board to control asynchronous single phase motor, using two half-bridge gate –drive IC (Fairchild FAN73833MX) and four IGBT (Fairchild FGH30T65UPDT) as shown in the scheme below. ...
0
votes
1answer
63 views

why fs25r12w1t4 infineon module is burnt out when high current is paassed through it?

I am implementing a VFD for Induction motor drive. I have used fs25r12w1t4 Infineon IGBT module ( 1200v 25A) with gate driver 6ed003l06-f2. It always burnt out when I passed 2A current. What may the ...
-1
votes
3answers
62 views

Qustion about subthreshold voltage and driving capability

Recently,i read some paper,and some of paper said : To reduce the power consumption of VLSI,Supply voltage has decreased to the subthreshold voltage,and the subthreshold circuits consume a very low ...