Reverse Recovery Charge Calculator

✖Reverse Recovery Current is required by a power diode when it is quickly reverse biased and this current is required to clear it of charge carriers so that it can block the reverse voltage in BJT.ⓘ Reverse Recovery Current [I_RR]			+10% -10%
✖Reverse Recovery Time is the amount of time the current flows in the reverse direction when the forward current simultaneously switches directions due to residual stored charge in BJT.ⓘ Reverse Recovery Time [t_rr]			+10% -10%

✖Reverse Recovery Charge is the charge required to get anode current zero or, recovering its ability to block negative voltage from developing a current in BJT.ⓘ Reverse Recovery Charge [Q_RR]

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Formula

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Reverse Recovery Charge

Formula

`"Q"_{"RR"} = 0.5*"I"_{"RR"}*"t"_{"rr"}`

Example

`"0.040075C"=0.5*"35mA"*"2.29s"`

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Reverse Recovery Charge Solution

STEP 0: Pre-Calculation Summary

Formula Used

Reverse Recovery Charge = 0.5*Reverse Recovery Current*Reverse Recovery Time
Q_RR = 0.5*I_RR*t_rr
This formula uses 3 Variables

Variables Used

Reverse Recovery Charge - (Measured in Coulomb) - Reverse Recovery Charge is the charge required to get anode current zero or, recovering its ability to block negative voltage from developing a current in BJT.
Reverse Recovery Current - (Measured in Ampere) - Reverse Recovery Current is required by a power diode when it is quickly reverse biased and this current is required to clear it of charge carriers so that it can block the reverse voltage in BJT.
Reverse Recovery Time - (Measured in Second) - Reverse Recovery Time is the amount of time the current flows in the reverse direction when the forward current simultaneously switches directions due to residual stored charge in BJT.

STEP 1: Convert Input(s) to Base Unit

Reverse Recovery Current: 35 Milliampere --> 0.035 Ampere (Check conversion here)
Reverse Recovery Time: 2.29 Second --> 2.29 Second No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Q_RR = 0.5*I_RR*t_rr --> 0.5*0.035*2.29

Evaluating ... ...

Q_RR = 0.040075

STEP 3: Convert Result to Output's Unit

0.040075 Coulomb --> No Conversion Required

FINAL ANSWER

0.040075 Coulomb <-- Reverse Recovery Charge

(Calculation completed in 00.004 seconds)

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Credits

Created by Parminder Singh

Chandigarh University (CU), Punjab

Parminder Singh has created this Calculator and 100+ more calculators!

Verified by Rachita C

BMS College Of Engineering (BMSCE), Banglore

Rachita C has verified this Calculator and 50+ more calculators!

< 7 BJT Calculators

Reverse Recovery Current

Go Reverse Recovery Current = sqrt(2*Reverse Recovery Charge*Change in Current)

Reverse Recovery Time

Go Reverse Recovery Time = sqrt(2*Reverse Recovery Charge/Change in Current)

Reverse Recovery Charge

Go Reverse Recovery Charge = 0.5*Reverse Recovery Current*Reverse Recovery Time

Softness Factor

Go Softness Factor = Reverse Current Decay Time/Forward Current Decay Time

Power Loss in BJT

Go Average Power Loss = Energy Loss*Switching Frequency

BJT Turn OFF Time

Go Turn OFF Time = Storage Time+Fall Time

BJT Turn ON Time

Go Turn ON Time = Rise Time+Delay Time

Reverse Recovery Charge Formula

Reverse Recovery Charge = 0.5*Reverse Recovery Current*Reverse Recovery Time
Q_RR = 0.5*I_RR*t_rr

Why it is necessary to increase the width of the depletion region?

Depletion layer is responsible for separating p and n layers and during the conduction process, the width of depletion region is reduce for better mobility of charges, so to stop the mobility of charge in the diode the width of depletion region is increased so diode is capable of blocking large voltages.

How to Calculate Reverse Recovery Charge?

Reverse Recovery Charge calculator uses Reverse Recovery Charge = 0.5*Reverse Recovery Current*Reverse Recovery Time to calculate the Reverse Recovery Charge, The Reverse Recovery Charge is the charge required to remove the excess carriers from the drift region to increase the width of the depletion junction. Reverse Recovery Charge is denoted by Q_RR symbol.

How to calculate Reverse Recovery Charge using this online calculator? To use this online calculator for Reverse Recovery Charge, enter Reverse Recovery Current (I_RR) & Reverse Recovery Time (t_rr) and hit the calculate button. Here is how the Reverse Recovery Charge calculation can be explained with given input values -> 0.040075 = 0.5*0.035*2.29.

FAQ

What is Reverse Recovery Charge?

The Reverse Recovery Charge is the charge required to remove the excess carriers from the drift region to increase the width of the depletion junction and is represented as Q_RR = 0.5*I_RR*t_rr or Reverse Recovery Charge = 0.5*Reverse Recovery Current*Reverse Recovery Time. Reverse Recovery Current is required by a power diode when it is quickly reverse biased and this current is required to clear it of charge carriers so that it can block the reverse voltage in BJT & Reverse Recovery Time is the amount of time the current flows in the reverse direction when the forward current simultaneously switches directions due to residual stored charge in BJT.

How to calculate Reverse Recovery Charge?

The Reverse Recovery Charge is the charge required to remove the excess carriers from the drift region to increase the width of the depletion junction is calculated using Reverse Recovery Charge = 0.5*Reverse Recovery Current*Reverse Recovery Time. To calculate Reverse Recovery Charge, you need Reverse Recovery Current (I_RR) & Reverse Recovery Time (t_rr). With our tool, you need to enter the respective value for Reverse Recovery Current & Reverse Recovery 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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