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BJT Turn ON Time Formula

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Turn on Time is the sum of rise time (t_r ) and delay time (t_d ) of a diode in a transistor device. Check FAQs

T on = T r + T d

T_on - Turn ON Time?T_r - Rise Time?T_d - Delay Time?

BJT Turn ON Time Example

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With units

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Here is how the BJT Turn ON Time equation looks like with Values.

Here is how the BJT Turn ON Time equation looks like with Units.

Here is how the BJT Turn ON Time equation looks like.

2.9 = 1.75 + 1.15

2.9s = 1.75s + 1.15s

2.9 = 1.75 + 1.15

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BJT Turn ON Time Solution

Follow our step by step solution on how to calculate BJT Turn ON Time?

FIRST Step Consider the formula

T on = T r + T d

Next Step Substitute values of Variables

∴

T on = 1.75s + 1.15s

Next Step Prepare to Evaluate

∴

T on = 1.75 + 1.15

LAST Step Evaluate

∴

T on = 2.9s

BJT Turn ON Time Formula Elements

Variables

Turn ON Time

Turn on Time is the sum of rise time (t_r ) and delay time (t_d ) of a diode in a transistor device.

Symbol: T_on

Measurement: TimeUnit: s

Note: Value should be greater than 0.

Formulas to find Turn ON Time

Rise Time

Rise Time is the time required by the collector current to rise from 10% to 90% of its maximum value in transistor device.

Symbol: T_r

Measurement: TimeUnit: s

Note: Value should be greater than 0.

Formulas to find Rise Time

Delay Time

Delay Time is the time required by the collector current to charge the base emitter capacitance of a transistor device.

Symbol: T_d

Measurement: TimeUnit: s

Note: Value should be greater than 0.

Formulas to find Delay Time

Other formulas in BJT category

Go Reverse Recovery Time

t rr = \sqrt{2 \cdot \frac{Q RR}{ΔI}}

Go Reverse Recovery Current

I RR = \sqrt{2 \cdot Q RR \cdot ΔI}

Go Reverse Recovery Charge

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

Go Softness Factor

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

How to Evaluate BJT Turn ON Time?

BJT Turn ON Time evaluator uses Turn ON Time = Rise Time+Delay Time to evaluate 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 evaluate BJT Turn ON Time using this online evaluator? To use this online evaluator for BJT Turn ON Time, enter Rise Time (T_r) & Delay Time (T_d) and hit the calculate button.

FAQs on BJT Turn ON Time

What is the formula to find BJT Turn ON Time?

The formula of BJT Turn ON Time is expressed as Turn ON Time = Rise Time+Delay Time. Here is an example- 2.9 = 1.75+1.15.

How to calculate BJT Turn ON Time?

With Rise Time (T_r) & Delay Time (T_d) we can find BJT Turn ON Time using the formula - Turn ON Time = Rise Time+Delay Time.

Can the BJT Turn ON Time be negative?

No, the BJT Turn ON Time, measured in Time cannot be negative.

Which unit is used to measure BJT Turn ON Time?

BJT Turn ON Time is usually measured using the Second[s] for Time. Millisecond[s], Microsecond[s], Nanosecond[s] are the few other units in which BJT Turn ON Time can be measured.

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BJT Turn ON Time Formula

BJT Turn ON Time Example

BJT Turn ON Time Solution

BJT Turn ON Time Formula Elements

Other formulas in BJT category

How to Evaluate BJT Turn ON Time?

FAQs on BJT Turn ON Time

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