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Power Loss in MOSFET Formula

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

P loss = {I d}^{2} \cdot R ds

P_loss - Average Power Loss?I_d - Drain Current?R_ds - Drain Source Resistance?

Power Loss in MOSFET Example

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With units

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

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

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

187.425 = 105^{2} \cdot 17

187.425W = {105mA}^{2} \cdot 17kΩ

187.425 = 105^{2} \cdot 17

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Power Loss in MOSFET Solution

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

FIRST Step Consider the formula

P loss = {I d}^{2} \cdot R ds

Next Step Substitute values of Variables

∴

P loss = {105mA}^{2} \cdot 17kΩ

Next Step Convert Units

∴

P loss = {0.105A}^{2} \cdot 17000Ω

Next Step Prepare to Evaluate

∴

P loss = {0.105}^{2} \cdot 17000

LAST Step Evaluate

∴

P loss = 187.425W

Power Loss in MOSFET 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

Drain Current

Drain Current is the current that flow through the drain junction of the MOSFET and IGBT.

Symbol: I_d

Measurement: Electric CurrentUnit: mA

Note: Value should be greater than 0.

Formulas to find Drain Current

Drain Source Resistance

Drain source resistance in MOSFET is defined as the opposition faced by the current flowing through the drain source terminals.

Symbol: R_ds

Measurement: Electric ResistanceUnit: kΩ

Note: Value should be greater than 0.

Formulas to find Drain Source Resistance

Other formulas in MOSFET category

Go MOSFET Turn ON Time

T on = T d-on + T r

Go MOSFET Turn Off Time

T off = T d-off + T f

Go Input Current Distortion Factor

CDF = \frac{I s1}{I s}

Go Input Current Harmonic Factor

CHF = \sqrt{(\frac{1}{{CDF}^{2}}) - 1}

How to Evaluate Power Loss in MOSFET?

Power Loss in MOSFET evaluator uses Average Power Loss = Drain Current^2*Drain Source Resistance to evaluate the Average Power Loss, The Power Loss in MOSFET formula is defined as the power dissipated when a MOSFET starts conducting. Average Power Loss is denoted by P_loss symbol.

How to evaluate Power Loss in MOSFET using this online evaluator? To use this online evaluator for Power Loss in MOSFET, enter Drain Current (I_d) & Drain Source Resistance (R_ds) and hit the calculate button.

FAQs on Power Loss in MOSFET

What is the formula to find Power Loss in MOSFET?

The formula of Power Loss in MOSFET is expressed as Average Power Loss = Drain Current^2*Drain Source Resistance. Here is an example- 187.425 = 0.105^2*17000.

How to calculate Power Loss in MOSFET?

With Drain Current (I_d) & Drain Source Resistance (R_ds) we can find Power Loss in MOSFET using the formula - Average Power Loss = Drain Current^2*Drain Source Resistance.

Can the Power Loss in MOSFET be negative?

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

Which unit is used to measure Power Loss in MOSFET?

Power Loss in MOSFET 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 MOSFET can be measured.

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