Questions tagged [powermosfet]
The powermosfet tag has no usage guidance.
1
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1answer
32 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
23 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
31 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
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1answer
40 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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1answer
55 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
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2answers
56 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
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2answers
85 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
44 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
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1answer
49 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
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1answer
33 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 ...
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5answers
77 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 ...
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3answers
105 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 ...
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2answers
93 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
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2answers
96 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 ...
0
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1answer
103 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 ...
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2answers
76 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
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1answer
222 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
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0answers
100 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
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1answer
60 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
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0answers
126 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
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1answer
94 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
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3answers
116 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
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4answers
223 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
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2answers
110 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
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1answer
41 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
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1answer
46 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
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4answers
264 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
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1answer
288 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
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1answer
24 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
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3answers
132 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
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1answer
108 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 ...
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0answers
476 views
Regenerative braking circuit for a BLDC Motor
I am trying to design a regenerative braking circuit for clamping the voltage when it is increased due to BLDC Motor acting as a generator. Simulation wise I am getting the exact result. But when I ...
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1answer
678 views
arduino controlled spark plug with ignition coil
I am trying to built a ignition system which will have the following
Spark plug
Ignition coil (I don't know the spec of these. but this one is from Honda Activa)
Some switching circuit
I found ...
1
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4answers
748 views
How to calculate MOSFET internal gate resistance?
I was trying to figure out how to calculate the internal gate resistance of the MOSFET. For the purpose of analysis, Let's take the MOSFET as - BUK7Y3R5-40E
From most of the documents I read, best ...
0
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0answers
419 views
MOSFET for PSU switching
I want to make a Bench power supply unit based on:
For initial AC to DC conversion - ATX PSU (Enermax EG365AX-VE 350W) capable of providing 12V 26A
Internally Step up module for powering the below - ...
0
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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 ...
0
votes
1answer
65 views
on-state voltage
I am trying to study an ever-on IGBT. in other words, IGBT is tried to be on in a long time. To this purpose, a +15V constant dc voltage is applied to the gate-emitter. But, when connecting a +2V ...
0
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3answers
72 views
Need help to find replacement for power mosfet IRF7303
I have to design a voltage regulator circuit using DC-DC controller MAX1655.
Required voltage output from the circuit is 3.3V at 2A (circuit is shown at page 10 of datasheet).
According to the ...
0
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1answer
111 views
Battery protection circuit
I’m trying to design a battery protection circuit for this 300mAh 3.7V LiPo battery.
I’m an EE student which is designing his first pcb. Please forgive questions with obvious answers.
My questions:
...
0
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1answer
380 views
Life cycle of power MOSFET as a switch in SMPS circuits
In many SMPS application (BOOST converter in particular), power MOSFET is used as a switch and it is driven by a PWM/IC at a frequency in a range of hundreds kHz (f = 200kHz for instance). This means ...
1
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1answer
56 views
Confused by MOSFET pins
So here is a MOSFET that I'm planning to use for a 10A constant current source. Look at page 3 where where they've shown how a 1 sq. in. copper pad affects the RθJA. Pins 1-3 is the source, 4 is the ...
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2answers
759 views
Circuit with dual power source: Replacing diodes with MOSFETs
I'm modding an already built circuit which can operate from the current of a USB port about 90% of the time but in some specific cases it needs to draw more than the 500 mA the USB provides (it is ...
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2answers
137 views
How the does this circuit source 4-20mA?
In the circuit, how the mosfet flow the 4-20mA based on the resistor network?
1
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2answers
795 views
Mosfet based ripple filter for tube amp
I need some hint to fully understand how this circuit works (credits to Audio Design Guide):
simulate this circuit – Schematic created using CircuitLab
My doubts are in the operation of the ...
0
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0answers
38 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
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1answer
266 views
MOSFET turn off time way too long, why?
I would like to ask what is causing the following phenomenon. I've spotted this on my real buck converter at a low duty cycle first, then tried in my SPICE simulation as well which confirmed this.
...
0
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1answer
85 views
Mosfet blows on high load using gate driver
I am using LM5060 from TI for switching big modular N channel MOSFET in SOT-227 package (IXFN420N10T) for relative high 100-200A loads.
On small loads like 10-20A it was working fine then we tried a ...
0
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1answer
164 views
Choosing a MOSFET driver - calculating gate drive current requirement
I am trying to understand how to select an appropriate MOSFET driver for controlling a DC motor. I went through quite a lot of literature from Texas Instruments and Microchip, but I am still not able ...
3
votes
1answer
235 views
Problems snubbing HF noise on flyback converter transistor
I am working on the design of a flyback converter based on the LT3751 capacitor charging circuit. My design is similar to the 42 A cap charger example on pg. 25 of the LT3751 datasheet. In my case, ...
0
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1answer
111 views
MOSFET gate drivers [closed]
This circuit requires two gate drivers to drive a push-pull configuration, can anyone recommend any since the source of the top MOSFET is floating it isnt as simple as a low-side driver. They would ...
