Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [igbt]

Insulated-gate bipolar transistor, voltage-driven power transistor with fast switching times

IGBTs have fast switching times, and are not spec'd for operation in an analog region. For these reasons, they are typically used in switching applications, such as switched-mode power supplies and PWM motor drives. They switch slower than FETs, and thus have higher switching losses. But IGBTs are available in higher voltage ranges than FETs, making them the only solution for many applications.

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IGBT vs. Power MOSFET for switching applications. Where to draw the line?

For lower breakdown voltages, a power MOSFET is clearly the device to go for, in view of its higher efficiency, higher commutation speed and lower price. Where should the line be drawn, upwards of which IGBTs take over as the preferable solution?…
user1975053
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Driving highly inductive loads destroys mosfet driver

Background I am attempting to generate some relatively high voltages (>200KV) using a system of ignition coils. This question deals with a single stage of this system which we are attempting to make generate somewhere around 40-50KV. Originally the…
Los Frijoles
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What is the difference between driving a MOSFET gate and an IGBT gate?

Can I use an suitable IGBT gate driver for driving the MOSFET, and vice versa? Which parameters (threshold, plateau, and turn on voltage ratings, gate capacitance, etc) must be the same for this compatibility? What are the essential differences…
hkBattousai
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What caused this IGBT failure?

I connected the circuit below, a transistorized ignition circuit, and it worked for a couple minutes, then it stopped working (engine quit, wouldn't restart). When it stopped working, I couldn't feel anything that had clearly overheated on the…
Bob
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IGBT ratings, I don't understand how this is possible

I found the IXGX400N30A3 at Digikey. The datasheet says the device is rated for 400A @ 25C, 1200A @ 25C for 1ms, with a voltage rating of 300V and PD of 1000W. Really? This TO-264 package can control 400A of current all day long? I can short out…
Bryan Boettcher
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Need help understanding and interpreting IGBT datasheets

When it comes to motor control, I understand that we have the option of using discrete MOSFETs or IGBTs. Also, there are some products in the market where 6 IGBTs are placed in one single package, such as GB25XF120K. (Here's another example part,…
SomethingBetter
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What happens with transistor outside max temperature range?

Suppose I have an IGBT transistor rated for 60A, that has junction temperature range of -55 to 175C. What happens if I do not exceed max current, but I do exceed max temperature? The characteristics in the datasheets don't seem to have any changes…
mactro
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Driving MOSFET/IGBT - Why Miller Plateau is a plateau?

I'm currently trying to understand what the Miller plateau is: what the different parameters that influence the Miller plateau are, when it begins, and when it ends. I'm reading document "Fundamentals of MOSFET and IGBT gate Driver circuit" from…
Jess
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n Gate to source capacitor in gate drive?

I'm designing a gate drive and I saw in a reference design this circuit, what would be the explanation for placing a capacitor between gate-source of the MOSFET (or IGBT)? I've read that a resistor is also placed likewise to prevent sudden turn…
E.pow93
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What is this circuit equivalent to?

Connecting a small-signal N-channel MOSFET and a power NPN BJT like this darlington-ish configuration, what does it produce? Is it equivalent to what people call IGBT? What about its P-channel counterpart? simulate this circuit – Schematic created…
Maxthon Chan
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Why is this BJT not going into saturation?

I built a project based off of this description, but substituted an STGP7NC60HD IGBT. See the schematic below (Note: IGBT symbol doesn't exist as of this post, so JFET was substituted). The coil and points breaker are external to the circuit. I…
Bob
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H-bridge driver circuit

I am trying to use the IGBT driver IR2184 to drive a H-bridge made of powerpack CM100DU-24F. Here is the circuit I built: simulate this circuit – Schematic created using CircuitLab a) How do you choose the value of the boostrap capacitor between Vs…
ths1104
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What kind of component this is (ST e3 ZOM Y734)?

please help to identify following electronic component from the image: It is clearly seen all symbols: ST e3 ZOM Y734 So it's definitely "STMicroelectronics". However, I could not find any information about this electronic component either on the…
lol lol
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LTspice singular matrix error by changing model parameters

I am trying to create a model of an IGBT with the Z-model from LTspice. Started with the default values it works. When I change parameters more and more I get the "singular matrix error" for certain combinations. I make a DOE, i.e. I change every…
Lutz
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What does the cross point of V-I curves mean?

Here you see a V-I graph including many curves achieved under different junction temperatures of an IGBT. As it can be seen there is a cross point where all curves intersect each other. Does it make sense? If yes, what does the cross point mean and…
Albert
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