BJT Turn ON Time Calculator

✖Rise Time is the time required by the collector current to rise from 10% to 90% of its maximum value in transistor device.ⓘ Rise Time [T_r]			+10% -10%
✖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%

✖Turn on Time is the sum of rise time (t_r ) and delay time (t_d ) of a diode in a transistor device.ⓘ BJT Turn ON Time [T_on]

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BJT Turn ON Time Solution

STEP 0: Pre-Calculation Summary

Formula Used

Turn ON Time = Rise Time+Delay Time
T_on = T_r+T_d
This formula uses 3 Variables

Variables Used

Turn ON Time - (Measured in Second) - Turn on Time is the sum of rise time (t_r ) and delay time (t_d ) of a diode in a transistor device.
Rise Time - (Measured in Second) - Rise Time is the time required by the collector current to rise from 10% to 90% of its maximum value 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.

STEP 1: Convert Input(s) to Base Unit

Rise Time: 1.75 Second --> 1.75 Second No Conversion Required
Delay Time: 1.15 Second --> 1.15 Second No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

T_on = T_r+T_d --> 1.75+1.15

Evaluating ... ...

T_on = 2.9

STEP 3: Convert Result to Output's Unit

2.9 Second --> No Conversion Required

FINAL ANSWER

2.9 Second <-- Turn ON Time

(Calculation completed in 00.008 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 Vidyashree V

BMS College of Engineering (BMSCE), Bangalore

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BJT Turn ON Time Formula

LaTeX Go

Turn ON Time = Rise Time+Delay Time
T_on = T_r+T_d

Why BJT start with a small delay?

The delay during the starting or turning on of a BJT is due to the presence of its internal common emitter capacitance.

How to Calculate BJT Turn ON Time?

BJT Turn ON Time calculator uses Turn ON Time = Rise Time+Delay Time to calculate the Turn ON Time, The BJT turn ON Time is the total required by the BJT to turn on completely and start conduction. Turn ON Time is denoted by T_on symbol.

How to calculate BJT Turn ON Time using this online calculator? To use this online calculator for BJT Turn ON Time, enter Rise Time (T_r) & Delay Time (T_d) and hit the calculate button. Here is how the BJT Turn ON Time calculation can be explained with given input values -> 2.9 = 1.75+1.15.

FAQ

What is BJT Turn ON Time?

The BJT turn ON Time is the total required by the BJT to turn on completely and start conduction and is represented as T_on = T_r+T_d or Turn ON Time = Rise Time+Delay Time. Rise Time is the time required by the collector current to rise from 10% to 90% of its maximum value in transistor device & Delay Time is the time required by the collector current to charge the base emitter capacitance of a transistor device.

How to calculate BJT Turn ON Time?

The BJT turn ON Time is the total required by the BJT to turn on completely and start conduction is calculated using Turn ON Time = Rise Time+Delay Time. To calculate BJT Turn ON Time, you need Rise Time (T_r) & Delay Time (T_d). With our tool, you need to enter the respective value for Rise Time & Delay 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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