Softness Factor Calculator

✖Reverse Current Decay Time is the time required by the reverse current to decays to 25% of the Reverse recovery current in BJT.ⓘ Reverse Current Decay Time [t_b]			+10% -10%
✖Forward Current Decay Time is the time required to make or decay the forward current flowing through the diode to 0 in transistor device.ⓘ Forward Current Decay Time [t_a]			+10% -10%

✖Softness Factor is defined as the ratio of times forward current decay and reverse current decay in BJT.ⓘ Softness Factor [s]

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Formula

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Softness Factor

Formula

`"s" = "t"_{"b"}/"t"_{"a"}`

Example

`"0.23511"="2.25s"/"9.57s"`

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Softness Factor Solution

STEP 0: Pre-Calculation Summary

Formula Used

Softness Factor = Reverse Current Decay Time/Forward Current Decay Time
s = t_b/t_a
This formula uses 3 Variables

Variables Used

Softness Factor - Softness Factor is defined as the ratio of times forward current decay and reverse current decay in BJT.
Reverse Current Decay Time - (Measured in Second) - Reverse Current Decay Time is the time required by the reverse current to decays to 25% of the Reverse recovery current in BJT.
Forward Current Decay Time - (Measured in Second) - Forward Current Decay Time is the time required to make or decay the forward current flowing through the diode to 0 in transistor device.

STEP 1: Convert Input(s) to Base Unit

Reverse Current Decay Time: 2.25 Second --> 2.25 Second No Conversion Required
Forward Current Decay Time: 9.57 Second --> 9.57 Second No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

s = t_b/t_a --> 2.25/9.57

Evaluating ... ...

s = 0.235109717868339

STEP 3: Convert Result to Output's Unit

0.235109717868339 --> No Conversion Required

FINAL ANSWER

0.235109717868339 ≈ 0.23511 <-- Softness Factor

(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

Softness Factor Formula

Softness Factor = Reverse Current Decay Time/Forward Current Decay Time
s = t_b/t_a

What is the significance of softness factor?

Softness factors helps us determine how well a diode responds to the sudden transient voltages. As close the softness factor is to 0, better the recovery time of the diode and as the softness factor moves away from 0 the recovery time of the diode becomes more and more.

How to Calculate Softness Factor?

Softness Factor calculator uses Softness Factor = Reverse Current Decay Time/Forward Current Decay Time to calculate the Softness Factor, The Softness Factor formula is defined the ratio of reverse current decay time and forward current decay time. Softness Factor is denoted by s symbol.

How to calculate Softness Factor using this online calculator? To use this online calculator for Softness Factor, enter Reverse Current Decay Time (t_b) & Forward Current Decay Time (t_a) and hit the calculate button. Here is how the Softness Factor calculation can be explained with given input values -> 0.23511 = 2.25/9.57.

FAQ

What is Softness Factor?

The Softness Factor formula is defined the ratio of reverse current decay time and forward current decay time and is represented as s = t_b/t_a or Softness Factor = Reverse Current Decay Time/Forward Current Decay Time. Reverse Current Decay Time is the time required by the reverse current to decays to 25% of the Reverse recovery current in BJT & Forward Current Decay Time is the time required to make or decay the forward current flowing through the diode to 0 in transistor device.

How to calculate Softness Factor?

The Softness Factor formula is defined the ratio of reverse current decay time and forward current decay time is calculated using Softness Factor = Reverse Current Decay Time/Forward Current Decay Time. To calculate Softness Factor, you need Reverse Current Decay Time (t_b) & Forward Current Decay Time (t_a). With our tool, you need to enter the respective value for Reverse Current Decay Time & Forward Current Decay 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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