Questions tagged [igbt]
Insulated-gate bipolar transistor, voltage-driven power transistor with fast switching times
324 questions
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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 ...
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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 ...
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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 ...
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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 ...
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9
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4
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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 ...
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9
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1
answer
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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, ...
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4
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Gate half open on MOSFET or IGBT easily kills transistor on high power
I noticed that the power transistors DG50X12T2 (rated for 1049 W @ 175C) but also the FDL100N50F (rated for 2.5 kW) can easily conduct such amounts of power when fully on. But even when they are on a ...
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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 ...
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6
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4
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Why gate drivers have series resistors on gates?
Although gate drivers are often used to interface low-voltage logic with high gate thresholds, it is my understanding that their primary function is to ensure fast gate switching by supplying high ...
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IGBTs fail after high current, high voltage switch, despite being lower than absolute maximums mentioned in datasheet
I'm using FGH60N60 IGBT as a switch. The circuit is basically a capacitor-discharging circuit. I have a 10 mF capacitor charged to 310 volts and connected to 2 Ω of load via this IGBT (I connect 4 ...
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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 ...
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Is there at least one commercial off-the-shelf P-channel IGBT?
I was expecting IGBTs to come only in N-channel varieties, but I figured I'd check if there are P-channel IGBTs out there. I can't find any, but neither can I find any statements by the IGBT ...
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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 ...
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1
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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 ...
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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&...
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4
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3
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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 ...
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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 ...
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IGBT as a switch
I've searched over the net on this issue but found no answers. In your own experience or thought, is it possible to use igbt as a switch?
If yes, please provide schematic as an example.
EDIT:
This ...
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3
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Active Miller Clamp vs "Bipolar" Gate Driving (e.g. VGE = ±15 V)
I've been designing an H-bridge inverter (~150 kHz and ~20 kW), and notice that many IGBT half bridge modules (e.g. this one) recommend a VGE of ±15 V. My understanding is that negative gate drive ...
4
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2
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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 ...
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Testing parallel IGBT module
A single NPN IGBT chip can usually be tested by a 9V battery between gate and emitter.
However opening up a larger module reveals many IGBT modules in parallel. I`ve seen some inverters using ...
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1
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Current source with IGBT
A simple current source using a bipolar transistor uses the voltage over an emitter resistor as feedback of the current. The current is given by the base voltage, the \$U_{eb}\$ of the transistor, ...
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4
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IGBT resistive load turn-off time anomalously long
My test is: IGBT OFF and ON Time.
I measured the IGBT on-time between the drive signal and the collector-emitter voltage, less than 1 µs.
I measured the IGBT off-time between the drive signal and the ...
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Why did my IGBT die? What did I do wrong?
I was doing some experiments using the following IGBT:
https://www.pollin.de/productdownloads/D130905D.PDF
I used it to drive a load of ~4.7ish Ohm and ~140ish µH from a capacitor bank of 2350µF.
Each ...
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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 ...
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4
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Rdson of this IGBT?
I want to estimate the power dissipation of this IGBT SGL160N60UFD but I can't find any Rdson, I leave the datasheet:
https://datasheetz.com/data/Discrete%20Semiconductor%20Products/IGBTs%20-%20Single/...
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3
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3
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What limits the number of MOSFETs/IGBTs in series or in parallel?
I was looking at HVDC systems out of curiosity and I have a question that I have not exactly found an answer for.
In HVDC converter, because of the high voltage (tens/hundreds of kV) they have to use ...
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1
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Can multiple IGBTs share voltage?
I'm building a solid state tesla coil, which requires me to switch very high voltages at high speed to achieve resonance. The problem: I can't find any IGBTs that can switch the voltage I need.
In ...
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3
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1
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IGBT gate voltage spike during turn-off
I'm getting a big voltage spike on the gate of an IGBT I'm using to switch high-current and high-voltage as shown in the images, and I wanted to ask what you all think might be causing it. I was ...
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Difference between the words 'die' and 'chip' [closed]
In some articles speaking about the IGBT power modules, we can see that the word 'die' has been used for calling the semiconductor component of IGBT device. However, other articles calls it 'chip'. ...
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3
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2
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MOSFET/IGBT Current capacities and SOAs
I need to switch off a 20V 60A DC current electronically. I don't want to use a relay, due to the environment (vibrations etc.).
It is not a switching supply, just a switch that turns everything off ...
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3
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1
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SEMIKRON: Effect of gate inductance on Eon (Switching losses)
I was reading the AN1403 "Determining Switching Losses of SEMIKRON IGBT modules" from SEMIKRON.
https://www.semikron.com/service-support/downloads/detail/semikron-application-note-...
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Choosing a suitable power supply for a MOSFET driver chip
I would like to use the TC4427 MOSFET driver chip, in order to switch the current through the IGBT AUIRG4PH50S, which will be placed in series with a resistive load. The power supply providing the ...
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2
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What does this IGBT data sheet mean by "transient" gate voltage?
I'm using IXGH45N120 to discharge some capacitors. The gate voltage is derived from the capacitor voltage, through some resistors and a zener. The circuit has worked fine for a long time, many ...
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1
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What is the use of the fourth leg, the one with igbt in series with the diode, in the infineon power module?
The circuit shown below is the schematic of infineon PIM module. I am specifically interested in FP15R12W1T4. From the schematic I could understand all elements other than the 4th leg which has an ...
3
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2
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2k
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IGBT-based capacitor charge transfer and thyristor-based capacitor discharge
simulate this circuit – Schematic created using CircuitLab
I am designing a circuit to provide a couple of strong and fast current pulses (~1000 A, more current is better, ~100 us, half-sine) ...
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3
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1
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Buck converter simulation
I am having some troubles to simulate a Buck converter in LTSpice.
I added a picture of my schematic in which a use an IGBT (IRGP20B120U-EP from International Rectifier) and a fast recovery diode ...
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1
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Igbt for AC 32A switch
I have been around this forum, and I am not sure I found my answer. I would like to realize a small and cheap AC switch. Relays being too big, I got interested in IGBT.
The goal is to turn on and off ...
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3
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1
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1k
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Synchronous rectification in IGBT
simulate this circuit – Schematic created using CircuitLab
In above standard 3-ph IGBT based inverter circuit suppose Diode D4 is carrying current because of inductive nature of load. If ...
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2
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IGBT transistor with auxiliary emitter
Recently I discovered, that some IGBT transistors in IGBT modules have the second pin for an emitter, called auxiliary emitter.
In the picture above 2nd and 4th pins are auxiliary emitters. This is ...
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3
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IGBT won't open in spark circuit
I'm building a EDM machine for removing broken metal-working taps. I'm using the following circuit, but having issues with the IGBT transistor
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2
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1
answer
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Difference between Vth and Vge?
What is the difference between the threshold voltage (Vth) and gate-emitter voltage (Vge) for IGBT devices?
How can I calculate Vth of an IGBT chip?
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Driving an ignition coil with an IGBT circuit
I'm trying to drive an automotive wasted-spark ignition coil pack using the following circuit which is being driven by a high-side driver at 12 V at the input for a 3 ms dwell duration (IN1 & IN2)....
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2
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Risks of using device body as heat sink for IGBT and Bridge rectifier
I want to know is any risk factor (electrical shocking or ... ) for using one aluminum (4mm) device body which is used as heat-sink for IGBT and Bridge rectifier that are working with 220 volt power?
...
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1
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Bidirectional AC Switch with IGBTs
I came across a "IGBT Bi-directional Switch" on the web while looking for a solution to my problem of protecting a TRIAC/SSR from a short-circuit.
Since TRIAC/SSR turn-off is not in my control, I'm ...
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Is it meaningful to describe an IGBT as desaturating?
I've heard IGBTs described as desaturating if too much current passes through them, particularly in the context of drivers with desat protection. My understanding of an NPN BJT is that it is in ...
- 17.9k
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1
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Which thermal resistance should I use to determine thermal dissipation of this IGBT? [closed]
I calculate losses for IGBT = 16 W.
Which thermal resistance should I multiply it by in order to know the temperature
Tjc = 0.34 C/W
Tja = 40 C/W
Why this big difference?
If I don't use a heat sink ...
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2
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Confusion about IGBT safe operating area
I have a pair of IXXH110N65C4 IGBTs in a stacked configuration:
It appears from the datasheet that the transistors can switch a current of 600A on and off, with a pulse length of up to 1ms (at 25c ...
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1
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Is this the correct way to calculate IGBT power loss?
I am having trouble obtaining the power dissipation of IGBTs. It does not have a buit in diode and it isn't driving an inductive load. So I read in an application note that IGBT power losses are ...
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Was this a high IGBT gate current?
I'm controlling an IGBT inverter with a DSP. I'm pretty sure I turned on two IGBT's at the same time which made a short circuit. The PCB I'm using to step up the PWM signal to drive the IGBT's let the ...
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