Questions tagged [powermosfet]
The powermosfet tag has no usage guidance.
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0answers
19 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
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5answers
74 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
72 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
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2answers
83 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 ...
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2answers
38 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
62 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
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2answers
69 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.
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1answer
135 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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0answers
82 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
56 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 ...
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0answers
104 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
91 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
115 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
209 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
108 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
40 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
40 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
235 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
209 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
23 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
111 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
92 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
26 views
Using a power enhancement type n-MOSFET as a switch
I have been trying to construct a lamp switching circuit using a power n-MOSFET as shown on the circuit diagram above. The issue that arose is that the lamp immediately turns on when 220Vdc is applied ...
0
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0answers
396 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
533 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
681 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
350 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
96 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
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1answer
64 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
69 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
104 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
267 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
54 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
652 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
135 views
How the does this circuit source 4-20mA?
In the circuit, how the mosfet flow the 4-20mA based on the resistor network?
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2answers
607 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
33 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
228 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
80 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
122 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
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1answer
209 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
97 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 ...
0
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2answers
73 views
What Prevents load voltage from Flowing into Vsupply in this circuit?
Here, U1 is an optocoupler called TLP250. It is powered by Vsupply which is 12 V. V2 is the load voltage and it is at 24V. But it can be as much as 200V.
My question is, that since both Vsupply and ...
0
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1answer
988 views
Why is there a gate-source short on the n-channel mosfet? (circuit attached)
I am having a problem with the circuit below.
I am trying to use the IRLR8726TRPBF to switch a 24V pump by turning the Gate HIGH and LOW using the Arduino. However, there when I connect power to the ...
5
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4answers
9k views
p-channel MOSFET switch
I want to use a MOSFET as a switch driven by my microcomputer.
The original circuit using N-channel MOSFET is on the left side. Honestly, I do not understand the choice of the IRLZ44. The circuit ...
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2answers
115 views
Protecting my MOSFET
I'm working on a circuit to turn on and off a set of lights on a vehicle.
I have to do the switching on the high side of the lights and need to use a positive voltage to trigger them on. So, I've got ...
1
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1answer
152 views
How many MOSFETs can a linear controller handle?
I designed a circuit for a high current linear regulator (20A peak, 16.4V (max) input regulated to 13.8V) using a Micrel MIC5158 together with a BUK9575-55A. The 20 A peaks are short, since the use is ...
10
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2answers
12k views
How to design the gate resistor value?
This is the datasheet of the driver IC I am working on (LM5112).
Following is the application diagram of the module.
Basically this is the GATE driver circuit for the MOSFET with PDM signal as the ...
0
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1answer
85 views
Help Using a MOSFET
I have an N-channel MOSFET, part number IXFH30N50P. I am trying to use it as a switch for a 320V 8100uF capacitor bank. My idea is that I would have a separate, small voltage source, like a battery, ...
2
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3answers
614 views
Logic level mosfet to switch on 3.7v battery
Can anyone recommend a logic level mosfet(2v-5v gate) that can switch on/off a 3.7v lipo battery. Battery load will be 2-3 ampere on 3.7v-4.2v. I tried something like FQP30N06L but will only work on ...
