Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

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.

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 .

1056 questions
14
votes
7 answers

BJT push-pull for a MOSFET

I'm looking for a way to drive a MOSFET with discrete components. Actually I need to drive a bunch of MOSFETs, with currents of 100-150A. And I'm wondering it would be possible not to use driving ICs, to have more control over functionality, less…
user95482301
  • 1,130
  • 3
  • 15
  • 37
4
votes
3 answers

AC Coupled Gate Drive circuit

Here is the Following circuit : I don't know how the application note can assert that the voltage after the capacitor is equal to Vdrv-Vcl or -Vcl according to the driver output as there is a resistor Rgs ? Even with the clamp circuit it is just…
Jess
  • 2,978
  • 2
  • 24
  • 56
4
votes
1 answer

MOSFET as switch with 2 voltage sources

I'm trying to create a MOSFET based switch device. I want to control the gate with some GPIO pins (H = 3.3V, L = 0V). I understand there must be a positive voltage (VGSth) between gate and source in order current can flow from drain to…
bkausbk
  • 288
  • 5
  • 16
3
votes
3 answers

Gate driver unexpected output

I'm new to this forum and to microelectronics, my apologies if I don't give all relevant information. I'm trying to use a FAN3214TMX low-side MOSFET gate driver (datasheet). Input is provided by a Raspberry Pi GPIO, which delivers a 200 us pulse of…
Matt
  • 35
  • 5
3
votes
2 answers

Using MOSFETS for a Level Shifter

I want to use a pair of N and P channel mosfets in a totem pole arragement to shift a VFD display on and off using a 74LS247 decoder/driver. I would put the P channel with the source pin on the top and connected to the 25 volts the VFD requires. The…
Ed Edmondson
  • 31
  • 3
2
votes
2 answers

Driving a high-side N-channel FET

I'm currently using a LM5109B to attempt to drive a high-side N channel mosfet in a particular setup. I want to drive it independently of the low-side driver. I'm aware that the provided IC is used for H-bridge configuration. As expected, when there…
Elec1290
  • 21
  • 1
2
votes
2 answers

Use transistors instead of gate driver for gate drive transformer

I've been working on a solid state tesla coil project. I have a question about the driver circuit to drive pulse transformer. If I input a modulated or interrupted waveform on the input of the transistor base pins, can this transistor arrangment…
Mahesh Mahesh
  • 51
  • 3
2
votes
2 answers

MOSFET half bridge driver not working

I have an IR2104 MOSFET half-bridge driver connected exactly as shown in an example circuit in its datasheet: I'm using two IRGPS4067DPBF IGBTs and a 100nF bootstrap capacitor. The whole circuit including the high-side IGBT collector are running on…
DELTA12
  • 878
  • 6
  • 18
2
votes
0 answers

Connection of IR 2110 for grid connected flyback inverter

I hope you all are fine. Before i proceed to my question please refer to the diagram shown below. The circuit is basically the unfolding stage of the conventional flyback inverter. There are two switches S1 and S2 that work during positive and…
Hadeed Sher
  • 31
  • 3
1
vote
0 answers

Problem when switching off

I have the following schematic: the switch (S) is not the right one but i hope it will do the purpose here. It controls electro-screwdriver using 48V. When I switch it off slowly, the voltage regulator blows…
Hamo
  • 41
  • 3
1
vote
2 answers

LTV-3120 with 20 V Zener power source

I have added a simple power source for my LTV-3120 IC that I want to use to drive a MOSFET. LTV-3120: The "power source" is a 220 VAC rectifier with a 20 V Zener diode and 50 kΩ Rz. With this, I can measure ~20 V on the Zener diode, but it seems…
greengold
  • 175
  • 7
1
vote
1 answer

Losing signal when connecting MOSFET driver output to power MOSFET

I got CD40106B, CD4081B and TC4420. It all works great but when I connect the output of the TC4420 to a power MOSFET or a BJT the TC4420 signal drops completely. I've tried replacing the TC4420 with discrete push pull BJT and the same…
lidorov19
  • 71
  • 6
1
vote
1 answer

High-side none-inverting SOT-23-3 switch

It started with a typical simple high-side P-MOS battery supply switch with inverting logic. Vs = 3.3-4.2V. Vg = 0-2.8V. 0V on, Imax = 2.5A. A P-MOS with SOT-23-3 package was chosen and works fine. Suddenly people want to change to positive logic…
Sink
  • 11
  • 2
1
vote
1 answer

Where can I get obsolete MOSFET's from?

I have a Fusion5 tablet which is not working. There is a mosfet which gets very hot when I plug it in so 1st thing I want to replace. But I'm looked online and can not find where I can get a replacement. Is there places which sell there or can I get…
Peter Jackson
  • 13
  • 3
1
vote
1 answer

Increase mosfet turn off

I'm using a gate drive transformer to drive w45nm60 mosfet. And this circuit for increase gate turn off: But it seem to turning off the gate by throwing excess current from gate to source. So I want to use negative source taken from gdt (which it…
Hida
  • 67
  • 1
  • 6
1
2 3 4