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Power Loss in BJT Formula

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Average power loss is the power loss when transistor device is in working state. Check FAQs

P loss = E loss \cdot f sw

P_loss - Average Power Loss?E_loss - Energy Loss?f_sw - Switching Frequency?

Power Loss in BJT Example

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With units

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Here is how the Power Loss in BJT equation looks like with Values.

Here is how the Power Loss in BJT equation looks like with Units.

Here is how the Power Loss in BJT equation looks like.

187.5 = 0.125 \cdot 1.5

187.5W = 0.125J \cdot 1.5kHz

187.5 = 0.125 \cdot 1.5

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Power Loss in BJT Solution

Follow our step by step solution on how to calculate Power Loss in BJT?

FIRST Step Consider the formula

P loss = E loss \cdot f sw

Next Step Substitute values of Variables

∴

P loss = 0.125J \cdot 1.5kHz

Next Step Convert Units

∴

P loss = 0.125J \cdot 1500Hz

Next Step Prepare to Evaluate

∴

P loss = 0.125 \cdot 1500

LAST Step Evaluate

∴

P loss = 187.5W

Power Loss in BJT Formula Elements

Variables

Average Power Loss

Average power loss is the power loss when transistor device is in working state.

Symbol: P_loss

Measurement: PowerUnit: W

Note: Value can be positive or negative.

Formulas to find Average Power Loss

Energy Loss

Energy loss is defined as the power dissipated or wasted by transistor device in one complete cycle.

Symbol: E_loss

Measurement: EnergyUnit: J

Note: Value should be greater than 0.

Formulas to find Energy Loss

Switching Frequency

Switching Frequency is the rate at which the DC voltage is switched on and off during the pulse width modulation process in a switching power supply in transistor device.

Symbol: f_sw

Measurement: FrequencyUnit: kHz

Note: Value should be greater than 0.

Formulas to find Switching Frequency

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 Power Loss in BJT?

Power Loss in BJT evaluator uses Average Power Loss = Energy Loss*Switching Frequency to evaluate the Average Power Loss, The Power Loss in BJT formula is defined as the power loss during the operation of BJT. It is mainly due to the switching of BJT. Average Power Loss is denoted by P_loss symbol.

How to evaluate Power Loss in BJT using this online evaluator? To use this online evaluator for Power Loss in BJT, enter Energy Loss (E_loss) & Switching Frequency (f_sw) and hit the calculate button.

FAQs on Power Loss in BJT

What is the formula to find Power Loss in BJT?

The formula of Power Loss in BJT is expressed as Average Power Loss = Energy Loss*Switching Frequency. Here is an example- 187.5 = 0.125*1500.

How to calculate Power Loss in BJT?

With Energy Loss (E_loss) & Switching Frequency (f_sw) we can find Power Loss in BJT using the formula - Average Power Loss = Energy Loss*Switching Frequency.

Can the Power Loss in BJT be negative?

Yes, the Power Loss in BJT, measured in Power can be negative.

Which unit is used to measure Power Loss in BJT?

Power Loss in BJT is usually measured using the Watt[W] for Power. Kilowatt[W], Milliwatt[W], Microwatt[W] are the few other units in which Power Loss in BJT can be measured.

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