Questions tagged [powermosfet]
The powermosfet tag has no usage guidance.
90
questions
0
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0answers
72 views
Choosing the right MOSFET for this application [on hold]
About this circuit:
1) The input is 600 VAC rms.
2) L1 has a DC resistance of 290 ohms.
3) The load draws about 4 mA when SW1 is open. At worst, it would draw 10 mA. This current is too low to ...
0
votes
0answers
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 ...
0
votes
1answer
42 views
Control USB Power with a 5V signal (from an Arduino) [closed]
I am trying to build my own version of a Chargie™ from https://chargie.org/ , which is basically a USB relay. My idea is to use a power MOSFET to switch the power line of a USB cable. I used the only ...
0
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0answers
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 ...
0
votes
2answers
102 views
15kV High voltage pulse generator circuit how to have digital control?
first of all I'm fairly new to making a more complicated circuit.
I'm trying to make a PCB with an ATmega328PB chip on it. And with that chip I want to control a High voltage pulse generator (Arc ...
2
votes
3answers
74 views
Electronic load, Problem turning MOSFET on
I am trying to make an adjustable dummy load to test a 12V supply, I’m having trouble with the op-amp feedback circuit.
Attached is a simplified schematic. I have tried lots of things and stripped it ...
1
vote
0answers
11 views
Is there a difference between breakdown mechanisms in UIS vs. reverse bias ramping?
I'm attempting to simulate breakdown in a shielded SiC power MOSFET (shown below) through reverse bias ramping (positive bias at drain on the bottom) until breakdown.
From what I've seen in ...
0
votes
1answer
180 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 ...
0
votes
1answer
170 views
How can I interface with arduino mega2560 to detect the presence of a 48 V without pulling down the voltage by more than 0.1 V
How can I interface with a microcontroller to detect presence of a 48 V supply with a source impedance of 10 kΩ without pulling down the voltage by more than 0.1 V?
I need to step down the output ...
0
votes
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. ...
-1
votes
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?
1
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0answers
63 views
Electronic load for negative voltage PSU
I am making a MOSFET based electronic load to test my PSU rails.
Below is a simplified version of my circuit with V2 as the PSU that is being tested. I want to be able to test negative voltage rails ...
1
vote
0answers
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 ...
0
votes
1answer
47 views
Mosfet testing for short from youtube repair video
In the 23:40 of the youtube video https://youtu.be/YQ7SXJqIpzs , the presenter does a p-channel mosfet test for short, using his bench power supply on the circuit.
From what i understood, he ...
1
vote
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,...
0
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0answers
43 views
Problem with MAX1645B test circuit?
Please consider the schematic:
The MAX1645B is a level 2 battery charger.
My problem is with the P-Channel MOSFETs.
There are two P-Channel MOSFETs in the above circuit.
From the datasheet:
...
1
vote
2answers
137 views
Using Mosfet with seperate Logic Converter and Arduino
I am trying to use an IRLB3034 with an Arduino even though it is not a logic level MOSFET. I am planning on using an LM2937 12v regulator like the schematic below:
The connection going off the page ...
0
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0answers
85 views
IRF3205 switching problem
I bought a power mosfet(IRF3205) and tried to switch but mosfet is not behaving as I expected when gate pin is triggered it doesnt change its position.
Below is how my schematic looks like, I could ...
0
votes
0answers
31 views
MOSFET Choosing For SPWM Inverter
I'm trying to build a 220V spwm inverter with 30kHz carrier freq. with 350V input and 7A output current. I'm trying to choose suitable mosfet but I'm very confused about dv/dt, reverse recovery(body ...
1
vote
1answer
36 views
Optoisolated MOSFET to control a load - should I take in consideration MOSFET typical use?
I've already asked a specific question, but I'd like to evolve it in a more general question.
In a typical optoisolated IC like this:
Should I or not interconnect control (-) and DC (-) or will I ...
0
votes
0answers
34 views
How to interpret power MOSFET datasheet for PWM usage?
To explain shortly what this is about, I have two 3D printers with similar motherboards and I want to edit the firmware to achieve the best safety regarding the specifications of the MOSFETs used.
...
0
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0answers
40 views
Inverter Upgrade
I have 600VA, 12V Pure Sine Wave Inverter (Atleast under no load, its pure) having 8 IRF3205 Mosfets in total. (In full bridge configurtion)
I have modified its shunt. Now it do not give overload ...
0
votes
1answer
44 views
Zero Voltage in a power semiconductor chip
In an ON-mode silicon IGBT chip operating within a real power module, is the collector contact fixed at 0 V or emitter?
What about Power SiC MOSFET?
enter link description here
0
votes
2answers
82 views
nanoPower comparator driving MOSFET not providing expected output
I built the following circuit to charge a large capacitor from a low power source before switching the load:
simulate this circuit – Schematic created using CircuitLab
MAX9064, MCH3484, ...
1
vote
2answers
59 views
Problem with stacked power mosfet simulation
I'm trying to build a Circuit Lab simulation of a stacked power mosfet pulser as described in this paper. The simulation runs for 10 ms. After 5ms, the switch flips and the voltage at 'StageOne' drops ...
1
vote
2answers
100 views
Fixing conmutation for high voltage switching with power MOSFET
I have an issue with a charge circuit for a capacitor as load.
I want to switch approximately 400 V DC to charge a 1000 µF 600 V capacitor. I'm using a power MOSFET for this application. I need it to ...
1
vote
0answers
49 views
Rise time and fall time issue in the power MOSFET
In our automated design due to MOSFET obsolete we have changed new MOSFET which gives us rise and fall time issue at the frequency applied from 10Khz to 500Khz. when we use the power MOSFET as Load ...
3
votes
1answer
54 views
MOSFET selection for high current application
I am designing a reverse polarity protection using the LM74610 chip.Now, my circuit can take peaks of about 90Amps and constant of 50-52Amps. This is quite a load and I want to select the right MOSFET....
0
votes
1answer
50 views
Problem with simulation of a n- mosfet in pspice
Im trying to make a simulation based an a DC sweep from this circuit
But at the moment of simulation I receive this warning
WARNING: [NET0093]
No PSpiceTemplate for M4, ignoring
And it does ...
-1
votes
5answers
82 views
Which mosfet to use?
I’m working on a project which calls for a (5 volt 100 mA output) ir break beam activating a solenoid valve when the beam gets interrupted. It’s a 2 amp 12 volt solenoid.
What would be a suitable ...
0
votes
3answers
194 views
MOSFET Heating in LED Driver Circuit
I have designed LED Driver circuit using IRF540 and use PC817 Optocoupler for isolation.
However, the MOSFETs are heating too much after giving the PWM Signal.
One of my LED panels is 110W. What ...
-2
votes
2answers
119 views
Stk086 distance between pins? [closed]
I have been trying to make a footprint for this IC, and trying to figure out the distance between pins, it is a 10 pin ic what do you think the distance will be?
What is the normal distance between ...
0
votes
2answers
188 views
How to drive a high side mosfet with the L6388E driver?
I've been trying to assemble a circuit to drive an n channel mosfet on a high side mode with this ST L6388E chip click here for the datasheet
with this circuit:
using 12V of a power supply and 5V ...
1
vote
1answer
173 views
(inverter repairs) Does reverse polarity can kill power MOSFETs in UPS inverters? [closed]
I had an old computer UPS (almost 7 years) and I modified it to use external battery (a 12 Volt motorcycle battery) since the old 12 Volt battery is completely dead and no replacement is available for ...
0
votes
2answers
121 views
How to find the core temperature of a mosfet
I’m designing a step up DC/DC converter and I have to find the core temperature of the MOSFET. The MOSFET is the 2N7000.
I’ve been giving the VDS(ON) and the ambient temperature.
1
vote
1answer
321 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 ...
1
vote
0answers
143 views
MOSFET Driver P-channel
I want to create a DC-chopper to drive a motor. I found the following schematic online:
However i don't understand how the MOSFETs are driven. On top there is a P-channel MOSFET with source connected ...
0
votes
1answer
68 views
What will happen if P-channel Enhancement type MOSFET gate kept open while connected as diode in real case
[
I am using MOSFET as diode for polarity protection of system. Vehicle supply of 12V is applied to drain & system is connected to source. Gate kept open purpose.
I have simulated attached ...
2
votes
0answers
150 views
Overshoot/undershoot issues in load current wave form of a MOSFET
We have designed hardware circuit which validates voltage regulator maximum output current.
So we designed op-amp circuitry to control gate drive of the Power MOSFET and it will work in active region ...
0
votes
1answer
100 views
How to build a simple transistor switch?
How to build the following:
A simple Transistor turn-OFF switch.
A simple transistors circuit that has its own power source, but when I apply a second alternate power source then it will switch to ...
0
votes
2answers
118 views
How long do I have before my sensitive components get fried?
I'm using this IC (https://www2.mouser.com/datasheet/2/609/ADM1270-878589.pdf) to control the current and the voltage on some of the outputs of a PCB that controls the power to other PCBs, which have ...
3
votes
4answers
258 views
Burning a Power MOSFET
We are doing battery heat testing and want to be able to vary the current in the circuit to different test points up to 100A. Our circuit schematic is attached. The MOSFET is IXFN360N10T. We attached ...
0
votes
2answers
118 views
H-bridge motor controller [closed]
I made a circuit but I am not sure it is going to work. The circuit is supposed to drive a 36 V 28.5 A motor. I am having trouble finding out if applying 5V to IRLZ44PBF would open it fully and allow ...
0
votes
1answer
67 views
Ic and Vce equations of IGBT
I know in IGBTs while operating, parameters Ic (collector current) and Vce (collector-emitter voltage) are Tj (junction temperature) and Vge (gate-emitter voltage) dependent. Is there anything else ...
0
votes
1answer
55 views
Calculation of Vce from Ic-Vge Characteristic
We have found the Ic-Vge (collector current vs gate-emitter voltage) characteristic of an IGBT device as shown below at a high Vce (collector-emitter voltage) value (here 20V) from the datasheet (...
3
votes
4answers
344 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 ...
1
vote
1answer
391 views
Precaution and Rules to Paralleling Power MOSFETs
I'm going to use a Full Bridge Inverter for my application.
The problem is that the current which flows through the MOSFETs when they are ON can reach 70A RMS and the power dissipation is too high. ...
0
votes
1answer
28 views
Lower maximum current rating on available motor driver .
I am designing an arduino controlled autonomous bot with 2 DC motors to control.
The motors i have to use are 500rpm 12V Johnson DC motors with
Torque : 8kgcm and No-load current = 800 mA(Max), Load ...
0
votes
3answers
166 views
What can happen with the PCB foil while SMD resistor destructive overheat?
I need to protect the gate driving circuit by putting the resistor between the gate and the control circuit:
During the testing of the mockup MOSFETs can go be destroyed which leaded to high voltage ...
1
vote
1answer
170 views
Why the MOSFET VDSS is measured at 250 µA?
General defintition of the MOSFET VDSS is " BVDSS is usually defined as the drain to source voltage when leakage current is 250uA"
How this number 250 µA came? or What is the significance of this ...
