IGBT Turn OFF Time Calculator

✖Delay Time is the time required by the collector current to charge the base emitter capacitance of a transistor device.ⓘ Delay Time [T_d]			+10% -10%
✖Initial Fall Time of an IGBT is the time it takes for the collector current to fall from 90% to 10% of its initial value after the gate voltage has been turned off.ⓘ Initial Fall Time [t_f1]			+10% -10%
✖Final Fall Time of an IGBT is the time it takes for the collector current to fall from 10% to 1% of its initial value after the gate voltage has been turned off.ⓘ Final Fall Time [t_f2]			+10% -10%

✖turn Off time is the sum of storage time (t_s ) and fall time (t_f ) is defined as the Turn-off time of diode in transistor device.ⓘ IGBT Turn OFF Time [T_off]

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Formula

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IGBT Turn OFF Time

Formula

`"T"_{"off"} = "T"_{"d"}+"t"_{"f1"}+"t"_{"f2"}`

Example

`"3.472s"="1.15s"+"1.67s"+"0.652s"`

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IGBT Turn OFF Time Solution

STEP 0: Pre-Calculation Summary

Formula Used

Turn OFF Time = Delay Time+Initial Fall Time+Final Fall Time
T_off = T_d+t_f1+t_f2
This formula uses 4 Variables

Variables Used

Turn OFF Time - (Measured in Second) - turn Off time is the sum of storage time (t_s ) and fall time (t_f ) is defined as the Turn-off time of diode in transistor device.
Delay Time - (Measured in Second) - Delay Time is the time required by the collector current to charge the base emitter capacitance of a transistor device.
Initial Fall Time - (Measured in Second) - Initial Fall Time of an IGBT is the time it takes for the collector current to fall from 90% to 10% of its initial value after the gate voltage has been turned off.
Final Fall Time - (Measured in Second) - Final Fall Time of an IGBT is the time it takes for the collector current to fall from 10% to 1% of its initial value after the gate voltage has been turned off.

STEP 1: Convert Input(s) to Base Unit

Delay Time: 1.15 Second --> 1.15 Second No Conversion Required
Initial Fall Time: 1.67 Second --> 1.67 Second No Conversion Required
Final Fall Time: 0.652 Second --> 0.652 Second No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

T_off = T_d+t_f1+t_f2 --> 1.15+1.67+0.652

Evaluating ... ...

T_off = 3.472

STEP 3: Convert Result to Output's Unit

3.472 Second --> No Conversion Required

FINAL ANSWER

3.472 Second <-- Turn OFF Time

(Calculation completed in 00.004 seconds)

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Credits

Created by Mohamed Fazil V

Acharya institute of technology (AIT), Bengaluru

Mohamed Fazil V has created this Calculator and 50+ more calculators!

Verified by Parminder Singh

Chandigarh University (CU), Punjab

Parminder Singh has verified this Calculator and 600+ more calculators!

< 8 IGBT Calculators

Nominal Continuous Collector Current of IGBT

Go Forward Current = (-Total Voltage of Collector and Emitter+sqrt((Total Voltage of Collector and Emitter)^2+4*Resistance of Collector and Emitter*((Maximum Operating Junction-Case Temperature)/Thermal Resistance)))/(2*Resistance of Collector and Emitter)

Voltage Drop in IGBT in ON-State

Go Voltage Drop ON Stage = Forward Current*N Channel Resistance+Forward Current*Drift Resistance+Voltage Pn Junction 1

Saturation Voltage of IGBT

Go Collector to Emitter Saturation Voltage = Base Emitter Voltage of PNP Transistor+Drain Current*(Conductivity Resistance+N Channel Resistance)

IGBT Turn OFF Time

Go Turn OFF Time = Delay Time+Initial Fall Time+Final Fall Time

Maximum Power Dissipation in IGBT

Go Maximum Power Dissipation = Maximum Operating Junction/Junction to Case Angle

Input Capacitance of IGBT

Go Input Capacitance = Gate to Emitter Capacitance+Gate to Collector Capacitance

Breakdown Voltage of Forward Biased of IGBT

Go Breakdown Voltage on Safe Operating Area = (5.34*10^13)/((Net Positive Charge)^(3/4))

Emitter Current of IGBT

Go Emitter Current = Hole Current+Electronic Current

IGBT Turn OFF Time Formula

Turn OFF Time = Delay Time+Initial Fall Time+Final Fall Time
T_off = T_d+t_f1+t_f2

What is Gate Voltage Final Fall Time ?

Voltage drop in an IGBT (Insulated Gate Bipolar Transistor) in the ON-state refers to the voltage that is lost or dissipated across the IGBT when it is conducting current. When an IGBT is in the ON-state, it is allowing current to flow from the collector to the emitter. This conduction state is typically characterized by a certain voltage drop.

How to Calculate IGBT Turn OFF Time?

IGBT Turn OFF Time calculator uses Turn OFF Time = Delay Time+Initial Fall Time+Final Fall Time to calculate the Turn OFF Time, IGBT Turn OFF Time is the time it takes for the IGBT to turn off after the gate voltage has been turned off. It is important to note that the turn-off time is not instantaneous, and it can take several microseconds for the IGBT to completely turn off. Turn OFF Time Gate Voltage is affected by a number of factors, including the gate voltage, the gate current, the gate resistance, and the gate-source capacitance. The turn-off time can be reduced by increasing the gate current or by reducing the gate resistance. However, it is important to note that increasing the gate current or reducing the gate resistance can increase the switching losses. Turn OFF Time is denoted by T_off symbol.

How to calculate IGBT Turn OFF Time using this online calculator? To use this online calculator for IGBT Turn OFF Time, enter Delay Time (T_d), Initial Fall Time (t_f1) & Final Fall Time (t_f2) and hit the calculate button. Here is how the IGBT Turn OFF Time calculation can be explained with given input values -> 3.472 = 1.15+1.67+0.652.

FAQ

What is IGBT Turn OFF Time?

IGBT Turn OFF Time is the time it takes for the IGBT to turn off after the gate voltage has been turned off. It is important to note that the turn-off time is not instantaneous, and it can take several microseconds for the IGBT to completely turn off. Turn OFF Time Gate Voltage is affected by a number of factors, including the gate voltage, the gate current, the gate resistance, and the gate-source capacitance. The turn-off time can be reduced by increasing the gate current or by reducing the gate resistance. However, it is important to note that increasing the gate current or reducing the gate resistance can increase the switching losses and is represented as T_off = T_d+t_f1+t_f2 or Turn OFF Time = Delay Time+Initial Fall Time+Final Fall Time. Delay Time is the time required by the collector current to charge the base emitter capacitance of a transistor device, Initial Fall Time of an IGBT is the time it takes for the collector current to fall from 90% to 10% of its initial value after the gate voltage has been turned off & Final Fall Time of an IGBT is the time it takes for the collector current to fall from 10% to 1% of its initial value after the gate voltage has been turned off.

How to calculate IGBT Turn OFF Time?

IGBT Turn OFF Time is the time it takes for the IGBT to turn off after the gate voltage has been turned off. It is important to note that the turn-off time is not instantaneous, and it can take several microseconds for the IGBT to completely turn off. Turn OFF Time Gate Voltage is affected by a number of factors, including the gate voltage, the gate current, the gate resistance, and the gate-source capacitance. The turn-off time can be reduced by increasing the gate current or by reducing the gate resistance. However, it is important to note that increasing the gate current or reducing the gate resistance can increase the switching losses is calculated using Turn OFF Time = Delay Time+Initial Fall Time+Final Fall Time. To calculate IGBT Turn OFF Time, you need Delay Time (T_d), Initial Fall Time (t_f1) & Final Fall Time (t_f2). With our tool, you need to enter the respective value for Delay Time, Initial Fall Time & Final Fall Time and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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