Questions tagged [powermosfet]
The powermosfet tag has no usage guidance.
108
questions
0
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1answer
57 views
What the maximum possible temperature that a MOSFET can reach?
I'm choosing a switch for a power supply design. I would like to know the highest temperature the MOSFET can reach. The switch that I'm using is DMT3020LDV.
An input having 24V and 8A is supplied to ...
2
votes
0answers
51 views
Designing MOSFET bridge rectifiers for high voltages
I've been looking into MOSFET bridge rectifiers, also known as "zero IQ" rectifiers, as a replacement for traditional diode-based bridge rectifiers.
Here's a simple example:
The benefit, of course, ...
0
votes
1answer
60 views
Is it possible to reduce the Miller's plateau voltage?
Consider the following circuit:
Image source: Simplified Clamped Inductive Switching Model - Figure 3 from "Fundamentals of MOSFET and IGBT Gate Drive Circuits by Texas Instruments"
I would like to ...
0
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0answers
27 views
How do I avoid a high DC current flowing through mosfet in my SRSSTC tesla coil?
There are 6.48 amps flowing through the mosfet but only 12 mA through the capacitor, L2 would be my tesla coil primary.
How can I reduce the amount of components in my circuit and improve its ...
0
votes
1answer
58 views
3d printer MOSFET can't use on car bulb, but can use on other load (ie. LED, dc motor, relay)
I want to use a MOSFET that can handle high current use for switching, so I decided to use the external MOSFET for 3d printer. I tested it out on other loads such as motor, LED, relay it is able to ...
0
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4answers
87 views
Do Protected Power MOSFETs need a flyback diodes?
There are protected MOSFETs under various marketing names available (e.g. omnifet, hitfet, intellifet, etc). These devices include clamping diodes and overcurrent/temperature protection. They also ...
1
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0answers
38 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 ...
0
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0answers
55 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 ...
0
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0answers
38 views
N-MOSFET not passing current when gate is high (SPICE)
I'm having a very strange issue with some power MOSFET circuits I'm trying to build for regulated high-current pulses. I can get my circuit to work fine when I use a lower-amperage power MOSFET, but ...
2
votes
2answers
187 views
Resistance of mosfet's internal diode
I am an IoT solutions developer and not an engineer, so please excuse my vocabulary if not upto the mark.
I have used Mosfets such as FDD6637 and IRF9310 in my circuits for power switching and they ...
2
votes
3answers
52 views
Comparison of the SOAs of two MOSFETs
Below the SOA for the IXFP6N120P:
And the SOA for the IRFBG30:
The first one shows a DC line beyond 100 ms, but the second one does not. Does this mean the second one is unreliable beyond 10 ms, or ...
1
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0answers
57 views
MOSFET activates every time when ESP32 is restarted
I am using ESP32 (GPIO-13) and RFP30N06LE to control my load (Motor). Everything works fine until i restart/reset the board, Motor starts irrespective of state (ON/OFF). I tried adding pull-down but ...
0
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0answers
23 views
Smart High and Low Side Mosfet
For example I have two smart high or low side mosfet that have 4 channel. One high side driver has 1 amper per channel. Other high side has 2 amper per channel. I tested these smart high side mosfet ...
0
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1answer
94 views
Using series of LM 78XX for power supply
I'm new in electronics. I want provide 9V (VVD9) and 5V (VCC) for my electronic board including power mosfets (IRF 3205), high power LED (14V-3.5A), micro-controller (at-mega16), and etc. I use this ...
1
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1answer
61 views
Need for 2 drains in a MOSFET? [duplicate]
Iam looking at the datasheet of a dual MOSFET (IRF9358PbF.) which contains 2 drain pins and 1 source pin for each MOSFET.
What is the purpose of having 2 drains, when there is only 1 source pin?
Is ...
1
vote
1answer
53 views
Power Mosfet Information Mismatch: On Region Characteristics vs Total Charge Graphs
I'm dealing with Power N-Chanel Mosfets and, while looking at the data sheet of several units, I noticed that the information about the On-Region (\$ I_{D}\$ vs \$ V_{DS}\$) and the Gate Charge (\$ V_{...
1
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1answer
61 views
MOSFET switching seeing unneccessary pulse during Power ON
We have a MOSFET switching circuit to switch secondary(battery 5V) supply to load if power lost on primary(12V).
Circuit works fine currently.
But i am seeing a LOW pulse on highlighted red net in ...
1
vote
2answers
275 views
Is it possible to make an IGBT to work at duty cycles up to 100%?
I am designing an IGBT based chopper with single Low side switching IGBT (chosen low side switching because ease of driving the IGBT.)
There are plenty of resources available for SMPS (buck, boost, ...
0
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0answers
35 views
MOSFETs Cascode Configuration
The following schematic is from Texas Instruments: http://www.ti.com/tool/PMP10195
I have some questions on it:
Is Q1 always on? How do I calculate the voltage that the gate sees? It looks like this ...
0
votes
1answer
39 views
MOSFET and TVS Voltage requirements for 120V single phase AC circuit
I am designing a circuit that will gate single phase 120V AC through back-to-back N-channel MOSFETs connected as shown below. When passing AC, one MOSFET is on and the body diode in the other is ...
0
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0answers
65 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
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0answers
115 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
370 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
124 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
396 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
173 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
81 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
85 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
126 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
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0answers
38 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
50 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
276 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
48 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
158 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
218 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
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0answers
36 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
42 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
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0answers
60 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
votes
1answer
64 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
53 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
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2answers
101 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
62 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
140 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
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0answers
62 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
59 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
96 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
90 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
393 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
153 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 ...
