Questions tagged [mosfet-driver]

A circuit that accepts a small-signal digital input and produces as output a high current appropriate for driving the gate of a power MOSFET. See also the [gate-driving] tag.

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3answers
675 views

Half H Bridge VGS too high

I'm trying to drive a capacitive load with P and N mosfets in a half H bridge. The problem is that my control voltage is 1.8V, and the H bridge is switching 20V. My original plan was to use npn's to ...
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1answer
91 views

Mosfets burning in H-Bridge

I'm having a problem with a H-bridge, that drives a motor. Schematic This is the schematic for the H-bridge. Signals H[4:1] are generated by a microcontroller. mX and mY are the outputs for a DC ...
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36 views

Mosfet driver maximum input PWM frequency

Where in the datasheet of a mosfet driver, maximum PWM input frequency is mentioned? Is there a limit for the PWM frequency at all? For example I couldn't find anything related to frequency in IR2104 ...
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54 views

Building a buck converter using CMOS 555 with mosfet driver

Can I use ICM7555 IC to generate 300 KHz PWM signal and feed that PWM to IRL2104 mosfet driver to build a non-isolated DC to DC buck converter? I'm asking this question because I couldn't find any ...
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2answers
882 views

MC34063 with external FET. Why?

Follow on from : earlier post Below is an LTSpice simulation of an MC34063 step up (5v to 9v) circuit. As you can see, this particular circuit is working correctly, and delivering about 300mA. The N-...
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25 views

BMS won't output voltage despite good LiPo Cells

I have an 20 cell LiPo battery pack that is healthy at 80V in total, the BMS uses 12 MOSFETs in parallel to switch the negative terminal and they all seem healthy but won't switch on, so I can't get a ...
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1answer
408 views

Reverse engineering a high side MOSFET driver SMD circuit board

I am trying to reverse engineer a high side MOSFET driver smd circuit and I have a few components. I am trying to gather data for it. One is a diode with markings ...
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1answer
685 views

LTC4440 boosting in LTSpice, but not in reality

I have a simple LTC4440-5 circuit in both LTSpice: (R1 is just a load resistor, which isn't present in reality) And here in the matrix, there's: And: (Note that a few parts are slightly different ...
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2answers
617 views

MOSFETs on Motor Controller died

I've received a prototype for this PCB I described in a different thread: First PCB design, PWM Motor Controller feedback I've changed the design based on the feedback I got there, I changed the gate ...
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29 views

Design of a Gate Drive Transformer

I've designed a gate drive transformer, but I'm not sure if I did it right, so I need approve from experienced ones so I can send design to dealer for production. Transformer is a double ended(3 ...
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1answer
313 views

Explanation of a sample circuit for the FL5160 Dimmer controller

While looking for dimmer circuits, I stumbled upon the FL5160 Dimmer controller and it's specification at https://www.onsemi.com/pub/Collateral/FL5150-D.pdf The example schematic (for example, the ...
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2answers
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Not sure how to use Half Bridge Gate Driver (LIN being in/out of phase and more in general)

I am relatively new about semiconductors and I recently realized that driving MOSFETs requires a middle circuit for most microcontrollers. I followed schematics shared in this tutorial, except I ...
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1answer
58 views

Switching PMOS issue

i wanted to make a nand gate circuit for driving a few amp loads using pmfets. in my desgin im using DMP4010SK3Qfets, and any transistor thats capable of handeling 24+ volts on the collector. my ...
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1answer
53 views

How do I Drive High Side MOSFET in High Voltage Low Power DC-AC Unipolar Converter?

I'm working on a simple dual stage piezoelectric driver consisting of a DC-DC flyback converter (programmable from 50V to 250V) and a DC-AC half-bridge unipolar inverter. The flyback converter is ...
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1answer
155 views

getting arduino PWM from 0-5V to 0-10V or 0-12V?

I have an IR2110 driver and a LOD voltage regulator 15V from a solar panel. now this will supply 15V to VCC as shown below. Since I have a LOD voltage regulator of 15V, I can't apply the same voltage ...
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2answers
72 views

Drive IRFZ44N Mosfet with 2N2222 NPN Transistor from ESP8266

I have made a circuit which controls 12v led from ESP8266. Led is being switched from IRFZ44N Mosfet. To convert logic from 3.3v to 5v, I used 2N2222 transistor. So my overall circuit looks like this:-...
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40 views

Question about component name (DrMOS?)

I'm trying to find the fault on my GTX 970 card and it seems that I have found at least one of the problems. There seems to be a DrMOS(?) that after plugging the power in is getting hot to the touch ...
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59 views

Snubbing LC oscillation

I have a series LC resonant circuit L = 44.4mH C = 36.5pF fr = 125kHz. It is LF RFID antenna. The LC circuit is powered by an H-bridge with MOSFET transistors. 125kHz carrier frequency, 1kHz ...
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1answer
379 views

Voltage spikes in h-bridge inverter square wave output

I apologise if this is a repost but I couldn't find the problem anywhere else. I am trying to power an ultrasonic transducer using an h-bridge inverter design to convert arduino signal into a higher ...
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188 views

MOSFET Driving problem

I have this MOSFET Driver IC 16 Pin Package Specification - Maximum Drain Voltage 16V. Maximum Drain Current 7.5A EDIT: Schematic : All the Enable, Sen and Sel signals will be provided by a separate ...
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2answers
296 views

P-MOSFET Dropper-Switch - Linear Region

I'm repairing an ECU board from a SCANIA generator. It works with 24Vdc, and on the last maintenance the technician powered it with 220Vac, so it blew up some components. I've managed to replace the ...
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98 views

MOSFET Driver IC Testing

I have this MOSFET Driver IC Datasheet. This is in follow up to this question. I want to validate the block by testing. My block specifications - Input Gate Voltage -5V Drain to Source voltage Range : ...
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47 views

Current problem

I want to control 2 opamps to activate one circuit at a time so I designed an analog selector. Each circuit works very well. But when I connected them the voltage on the base of T4 jump to 17V. I ...
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24 views

Circuit to select from 2 inputs 4-20mA and 0-10V

I want to select one from the 2 inputs. if (BSP pressed) then output=0-10V else output=4-20mA. I used an and gate based on PNP and NPN mosfet but it didn't work. any suggestion plZ.
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1answer
30 views

Driving low voltage P-MOS N-MOS half bridge with dead time control, without bootstrap and one control line

I should need a driver of a PMOS NMOS bridge with dead control controlled by a one line from the microcontroller (because I have to use several PWM lines) that inserts a dead time control to avoid ...
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1answer
31 views

Difference between the VNLD5300 and VNLD5090

I have been looking for a low-side mosfet driver IC and found these VNLD5300 which is a 300mOhm 2A driver and the VNLD5090 which is a 90mOhm 13A driver. I would like to do one last sanity check, the ...
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1answer
2k views

Lithium ion battery protection IC not able to drive MOSFET

I have integrated the TP4056 charger design into my PCB. The problem is that when I connect the battery at the battery terminals, I am not able to get the voltage at its output pin. The circuit can be ...
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2answers
81 views

How do you match an LDMOS FET to 50 Ohms?

I'm considering using one of the following LDMOS FETs as an RF amplifier: AFM907N (8W) AFT05MS031NR1 (30W) AFT05MP075NR1 (70W) The datasheets provide \$Z_{source}\$ and \$Z_{load}\$ metrics for some ...
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1answer
162 views

3KW SR motor gate driver and simulation questions

I'm designing power electronics for 3-phase 3KW SR motor by using power MOSFETS of rating 600V. To drive the gates of these MOSFETS, I'm using IR2183 gate drivers, one per each phase. The DC voltage ...
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1answer
987 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 ...
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2answers
87 views

MOSFET 24V high-side switch

I'm trying to control 24V solenoids using logic level inputs at 5V. The following circuit works when replacing both power loops with a single 9V battery, except that the voltage across the gate and ...
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1answer
130 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. ...
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50 views

How to calculate snubber for switched inductor?

I'm driving inductive load with PWM and my MOSFET can not handle hard switching without reduce dv/dt ramp between drain-source. So I need to add RDC (resistor-diode-capacitor) snubber, but I don't ...
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1answer
83 views

Gate drive transformer for lower frequency (25 kHz)

I am doing this half bridge to generate High voltage from 300VDC.(Around >10000Volts for a corona discharge tube to produce ozone) I have gone through many application notes for making one GDT for ...
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2answers
89 views

Why can't I get any proper arcs out of this flyback transformer?

I salvaged a flyback transformer from an old TV and used it in a single MOSFET driver like this: I used 6 turns of insulated copper wire to make the primary coil with the centre tap and again 6 ...
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1answer
60 views

What advantages does CPLD have w.r.t microcontrollers in driving MOSFET drivers in inverter?

I have seen some designs where CPLDs have been used in driving the MOSFET driver in an inverter circuit. What advantage does is provide with regards to driving the same using controllers like TI ...
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1answer
47 views

Gate driver Isolation

I have designed a 50 W, 12V-5V buck converter operating at switching frequency 200kHz.This is just for understanding practical converter circuits, so I made a totem-pole bjt driver circuit for IRF640N....
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2answers
187 views

Problem in IR2112 use

What is wrong in this connection diagram. I had provided pwm with 20kHz and 5volts. But at the R3 I am not getting results
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1answer
36 views

Non-shorting SPDT switch using MOSFETs

My goal is to design a circuit using MOSFETs that would switch 12V power to one of the two high-current loads, using high-side switching. Control is done by a 3.3V MCU. The reason for using MOSFETS is ...
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3answers
94 views

Level Shifting a MOSFET

I have a high current low voltage MOSFET I'd like to drive with a higher voltage and a micro to reduce power losses through it. I built this circuit based off the typical level shifting designs. The ...
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48 views

Half H bridge to drive electromagnet

I want to control the current on an inductive load (electromagnet) by the means of PWM switching. I have done some research and saw a lot of different circuit configurations. The electromagnet will ...
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2answers
60 views

Why would this design (Si8261BCC-IS) blow the chip?

I created a design for a simple MOSFET driver using the Si8261BCC-IS. The schematic and Gerber files are available here. The schematic is also shown below. When I connect the input control signal of 3....
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1answer
120 views

Switching voltages with demux and switches

I am trying to design a circuit that, depending on a value that a microcontroller recieves (between 1 and 10), a fixed voltage of 20 V, 40 V, 60 V,... or 200 V (depending on the value recieved by the ...
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2answers
47 views

Problem with closing high side P mosfet using B type amplifier

I am using this high side P mosfet dirving circuity: My problem is the main P mosfet doesn´t deactivate entirely. More specificly its gate is at 8,4V (with 15V vbat voltage it makes 6,6V gate - ...
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1answer
39 views

Validation required for wiring of a 3 pin illuminated rocker switch

I'm trying to reproduce a setup for an induction heater. This is the one I am looking to do, but I ended up buying a rocker switch that has an integrated led, and it has 3 pins. Now I did find a guide ...
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1answer
49 views

Turn off MOSFET with diode - PWM controller Maximal output current

Here is my circuit (and I know that this circuit does not cause any problems at least for the moment): For turning on, the maximal current from the pin "OUT" is limited by the resistance ...
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1answer
1k views

Problem with IR2112 on Proteus

I am designing a pure sine wave inverter and I am using IR2110 as a driver for the H-bridge. On Proteus however only IR2112 is available so i used it. I managed to get all the connections in a correct ...
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1answer
104 views

Having trouble properly driving a MOSFET

I'm trying to build a pure sine wave inverter in LTspice (Image 1) but I'm running into some trouble. So far, it consists of three main parts: The SPWM generator generates an SPWM signal from a 200kHz ...
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0answers
50 views

How to drive MOSFET switches in a cascaded hybrid modular multilevel converter using a half-bridge driver “IR2103S”

I am trying to drive the MOSFET switches in a cascaded hybrid modular multi-level converter as shown in Fig. 1. Fig. 2 is used here to simplify the circuit and to present the problem (let's focus on ...
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2answers
161 views

2EDN mosfet driver burns out when connected to PWM signal

Good day everyone, I am building a motor controller for a 250W DC motor. Today I was testing a part of my design, but somehow the MOSFET driver did not work. The Arduino send a 50% square wave (4kHz) ...

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