Switching Power Calculator

✖The Activity factor is defined as the load capacitance which is charged and stores energy during 3/16 of all input transitions. This fraction is called the activity factor or alpha.ⓘ Activity Factor [α]			+10% -10%
✖Capacitance is the ratio of the amount of electric charge stored on a conductor to a difference in electric potential.ⓘ Capacitance [C]			+10% -10%
✖Base Collector Voltage is a crucial parameter in transistor biasing. It refers to the voltage difference between the base and collector terminals of the transistor when it is in its active state.ⓘ Base Collector Voltage [V_bc]			+10% -10%
✖Frequency refers to the number of occurrences of a periodic event per time and is measured in cycles/second.ⓘ Frequency [f]			+10% -10%

✖Switching Power is called the dynamic power because it arises from the switching of the load.ⓘ Switching Power [P_s]

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Switching Power Solution

STEP 0: Pre-Calculation Summary

Formula Used

Switching Power = Activity Factor*(Capacitance*Base Collector Voltage^2*Frequency)
P_s = α*(C*V_bc^2*f)
This formula uses 5 Variables

Variables Used

Switching Power - (Measured in Watt) - Switching Power is called the dynamic power because it arises from the switching of the load.
Activity Factor - The Activity factor is defined as the load capacitance which is charged and stores energy during 3/16 of all input transitions. This fraction is called the activity factor or alpha.
Capacitance - (Measured in Farad) - Capacitance is the ratio of the amount of electric charge stored on a conductor to a difference in electric potential.
Base Collector Voltage - (Measured in Volt) - Base Collector Voltage is a crucial parameter in transistor biasing. It refers to the voltage difference between the base and collector terminals of the transistor when it is in its active state.
Frequency - (Measured in Hertz) - Frequency refers to the number of occurrences of a periodic event per time and is measured in cycles/second.

STEP 1: Convert Input(s) to Base Unit

Activity Factor: 1.65 --> No Conversion Required
Capacitance: 4.9 Microfarad --> 4.9E-06 Farad (Check conversion here)
Base Collector Voltage: 2.02 Volt --> 2.02 Volt No Conversion Required
Frequency: 4 Hertz --> 4 Hertz No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

P_s = α*(C*V_bc^2*f) --> 1.65*(4.9E-06*2.02^2*4)

Evaluating ... ...

P_s = 0.000131960136

STEP 3: Convert Result to Output's Unit

0.000131960136 Watt -->0.131960136 Milliwatt (Check conversion here)

FINAL ANSWER

0.131960136 ≈ 0.13196 Milliwatt <-- Switching Power

(Calculation completed in 00.021 seconds)

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Created by Shobhit Dimri

Bipin Tripathi Kumaon Institute of Technology (BTKIT), Dwarahat

Shobhit Dimri has created this Calculator and 900+ more calculators!

Verified by Urvi Rathod

Vishwakarma Government Engineering College (VGEC), Ahmedabad

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< CMOS Power Metrics Calculators

Activity Factor

LaTeX Go Activity Factor = Switching Power/(Capacitance*Base Collector Voltage^2*Frequency)

Switching Power

LaTeX Go Switching Power = Activity Factor*(Capacitance*Base Collector Voltage^2*Frequency)

Short-Circuit Power in CMOS

LaTeX Go Short-Circuit Power = Dynamic Power-Switching Power

Dynamic Power in CMOS

LaTeX Go Dynamic Power = Short-Circuit Power+Switching Power

Switching Power Formula

LaTeX Go

Switching Power = Activity Factor*(Capacitance*Base Collector Voltage^2*Frequency)
P_s = α*(C*V_bc^2*f)

Explain activity factor.

The activity factor is the probability that the circuit node transitions from 0 to 1, because that is the only time the circuit consumes power. A clock has an activity factor of F = 1 because it rises and falls every cycle. Most data has a maximum activity factor of 0.5
because it transitions only once each cycle. Truly random data has an activity factor of 0.25 because it transitions every other cycle. Static CMOS logic has been empirically determined to have activity factors closer to 0.1 because some gates maintain one output state more often than another and because real data inputs to some portions of a system often remain constant from one cycle to the next.

How to Calculate Switching Power?

Switching Power calculator uses Switching Power = Activity Factor*(Capacitance*Base Collector Voltage^2*Frequency) to calculate the Switching Power, The Switching Power formula is defined as the dynamic power that arises from the switching of the load. Switching Power is denoted by P_s symbol.

How to calculate Switching Power using this online calculator? To use this online calculator for Switching Power, enter Activity Factor (α), Capacitance (C), Base Collector Voltage (V_bc) & Frequency (f) and hit the calculate button. Here is how the Switching Power calculation can be explained with given input values -> 131.9601 = 1.65*(4.9E-06*2.02^2*4).

FAQ

What is Switching Power?

The Switching Power formula is defined as the dynamic power that arises from the switching of the load and is represented as P_s = α*(C*V_bc^2*f) or Switching Power = Activity Factor*(Capacitance*Base Collector Voltage^2*Frequency). The Activity factor is defined as the load capacitance which is charged and stores energy during 3/16 of all input transitions. This fraction is called the activity factor or alpha, Capacitance is the ratio of the amount of electric charge stored on a conductor to a difference in electric potential, Base Collector Voltage is a crucial parameter in transistor biasing. It refers to the voltage difference between the base and collector terminals of the transistor when it is in its active state & Frequency refers to the number of occurrences of a periodic event per time and is measured in cycles/second.

How to calculate Switching Power?

The Switching Power formula is defined as the dynamic power that arises from the switching of the load is calculated using Switching Power = Activity Factor*(Capacitance*Base Collector Voltage^2*Frequency). To calculate Switching Power, you need Activity Factor (α), Capacitance (C), Base Collector Voltage (V_bc) & Frequency (f). With our tool, you need to enter the respective value for Activity Factor, Capacitance, Base Collector Voltage & Frequency and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Switching Power?

In this formula, Switching Power uses Activity Factor, Capacitance, Base Collector Voltage & Frequency. We can use 1 other way(s) to calculate the same, which is/are as follows -

Switching Power = (Positive Voltage^2)*Frequency*Capacitance

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