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Reverse Recovery Current Formula

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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. Check FAQs

I RR = \sqrt{2 \cdot Q RR \cdot ΔI}

I_RR - Reverse Recovery Current?Q_RR - Reverse Recovery Charge?ΔI - Change in Current?

Reverse Recovery Current Example

With values

With units

Only example

Here is how the Reverse Recovery Current equation looks like with Values.

Here is how the Reverse Recovery Current equation looks like with Units.

Here is how the Reverse Recovery Current equation looks like.

35.0086 = \sqrt{2 \cdot 0.04 \cdot 15.32}

35.0086mA = \sqrt{2 \cdot 0.04C \cdot 15.32mA}

35.0086 = \sqrt{2 \cdot 0.04 \cdot 15.32}

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Reverse Recovery Current Solution

Follow our step by step solution on how to calculate Reverse Recovery Current?

FIRST Step Consider the formula

I RR = \sqrt{2 \cdot Q RR \cdot ΔI}

Next Step Substitute values of Variables

∴

I RR = \sqrt{2 \cdot 0.04C \cdot 15.32mA}

Next Step Convert Units

∴

I RR = \sqrt{2 \cdot 0.04C \cdot 0.0153A}

Next Step Prepare to Evaluate

∴

I RR = \sqrt{2 \cdot 0.04 \cdot 0.0153}

Next Step Evaluate

∴

I RR = 0.0350085703792657A

Next Step Convert to Output's Unit

∴

I RR = 35.0085703792657mA

LAST Step Rounding Answer

∴

I RR = 35.0086mA

Reverse Recovery Current Formula Elements

Variables

Functions

Reverse Recovery Current

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.

Symbol: I_RR

Measurement: Electric CurrentUnit: mA

Note: Value can be positive or negative.

Formulas to find Reverse Recovery Current

Reverse Recovery Charge

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.

Symbol: Q_RR

Measurement: Electric ChargeUnit: C

Note: Value should be greater than 0.

Formulas to find Reverse Recovery Charge

Change in Current

Change in current refers to the variation in the flow of electrical charge carriers, usually electrons or electron-deficient atoms in a transistor device.

Symbol: ΔI

Measurement: Electric CurrentUnit: mA

Note: Value can be positive or negative.

Formulas to find Change in Current

sqrt

A square root function is a function that takes a non-negative number as an input and returns the square root of the given input number.

Syntax: sqrt(Number)

Other formulas in BJT category

Go Reverse Recovery Time

t rr = \sqrt{2 \cdot \frac{Q RR}{ΔI}}

Go Reverse Recovery Charge

Q RR = 0.5 \cdot I RR \cdot t rr

Go Softness Factor

s = \frac{t b}{t a}

Go BJT Turn ON Time

T on = T r + T d

How to Evaluate Reverse Recovery Current?

Reverse Recovery Current evaluator uses Reverse Recovery Current = sqrt(2*Reverse Recovery Charge*Change in Current) to evaluate the Reverse Recovery Current, The Reverse Recovery Current is defined as the amount of current required by the diode to remove the excess charge carriers from the drift region of the diode. Reverse Recovery Current is denoted by I_RR symbol.

How to evaluate Reverse Recovery Current using this online evaluator? To use this online evaluator for Reverse Recovery Current, enter Reverse Recovery Charge (Q_RR) & Change in Current (ΔI) and hit the calculate button.

FAQs on Reverse Recovery Current

What is the formula to find Reverse Recovery Current?

The formula of Reverse Recovery Current is expressed as Reverse Recovery Current = sqrt(2*Reverse Recovery Charge*Change in Current). Here is an example- 35008.57 = sqrt(2*0.04*0.01532).

How to calculate Reverse Recovery Current?

With Reverse Recovery Charge (Q_RR) & Change in Current (ΔI) we can find Reverse Recovery Current using the formula - Reverse Recovery Current = sqrt(2*Reverse Recovery Charge*Change in Current). This formula also uses Square Root (sqrt) function(s).

Can the Reverse Recovery Current be negative?

Yes, the Reverse Recovery Current, measured in Electric Current can be negative.

Which unit is used to measure Reverse Recovery Current?

Reverse Recovery Current is usually measured using the Milliampere[mA] for Electric Current. Ampere[mA], Microampere[mA], Centiampere[mA] are the few other units in which Reverse Recovery Current can be measured.

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