Thermal Resistance between Junction and Ambient Solution

STEP 0: Pre-Calculation Summary
Formula Used
Thermal Resistance between junction and Ambient = Temperature Difference Transistors/Power Consumption of Chip
Θj = ΔT/Pchip
This formula uses 3 Variables
Variables Used
Thermal Resistance between junction and Ambient - (Measured in Kelvin per Watt) - Thermal Resistance between junction and Ambient is defined as the rise in the resistance due to the heating effect in junction.
Temperature Difference Transistors - (Measured in Kelvin) - Temperature Difference Transistors is denoted by ΔT symbol.
Power Consumption of Chip - (Measured in Watt) - Power Consumption of Chip is power consumed by the integrated chip when the current flows through it.
STEP 1: Convert Input(s) to Base Unit
Temperature Difference Transistors: 2.4 Kelvin --> 2.4 Kelvin No Conversion Required
Power Consumption of Chip: 0.797 Milliwatt --> 0.000797 Watt (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Θj = ΔT/Pchip --> 2.4/0.000797
Evaluating ... ...
Θj = 3011.29234629862
STEP 3: Convert Result to Output's Unit
3011.29234629862 Kelvin per Watt -->3.01129234629862 Kelvin per Milliwatt (Check conversion here)
FINAL ANSWER
3.01129234629862 3.011292 Kelvin per Milliwatt <-- Thermal Resistance between junction and Ambient
(Calculation completed in 00.004 seconds)

Credits

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Bipin Tripathi Kumaon Institute of Technology (BTKIT), Dwarahat
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20 CMOS Special Purpose Subsystem Calculators

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Go Series Resistance from Die to Package = Thermal Resistance between junction and Ambient-Series Resistance from Package to Air
Series Resistance from Package to Air
Go Series Resistance from Package to Air = Thermal Resistance between junction and Ambient-Series Resistance from Die to Package
Thermal Resistance between Junction and Ambient
Go Thermal Resistance between junction and Ambient = Temperature Difference Transistors/Power Consumption of Chip
Temperature Difference between Transistors
Go Temperature Difference Transistors = Thermal Resistance between junction and Ambient*Power Consumption of Chip
Power Consumption of Chip
Go Power Consumption of Chip = Temperature Difference Transistors/Thermal Resistance between junction and Ambient
Invertor Power
Go Inverter Power = (Delay of Chains-(Electric Effort 1+Electric Effort 2))/2
Invertor Electric Effort 1
Go Electric Effort 1 = Delay of Chains-(Electric Effort 2+2*Inverter Power)
Invertor Electric Effort 2
Go Electric Effort 2 = Delay of Chains-(Electric Effort 1+2*Inverter Power)
Delay for Two Inverters in Series
Go Delay of Chains = Electric Effort 1+Electric Effort 2+2*Inverter Power
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Go Transfer Function PLL = PLL Output Clock Phase/Input Reference Clock Phase
Output Clock Phase PLL
Go PLL Output Clock Phase = Transfer Function PLL*Input Reference Clock Phase
Input Clock Phase PLL
Go Input Reference Clock Phase = PLL Output Clock Phase/Transfer Function PLL
PLL Phase Detector Error
Go PLL Error Detector = Input Reference Clock Phase- Feedback Clock PLL
Feedback Clock PLL
Go Feedback Clock PLL = Input Reference Clock Phase-PLL Error Detector
Change in Phase of Clock
Go Change in Phase of Clock = PLL Output Clock Phase/Absolute Frequency
Change in Frequency of Clock
Go Change in Frequency of Clock = Fanout/Absolute Frequency
Capacitance of External Load
Go Capacitance of External Load = Fanout*Input Capacitance
Fanout of Gate
Go Fanout = Stage Effort/Logical Effort
Stage Effort
Go Stage Effort = Fanout*Logical Effort
Gate Delay
Go Gate Delay = 2^(N Bit SRAM)

Thermal Resistance between Junction and Ambient Formula

Thermal Resistance between junction and Ambient = Temperature Difference Transistors/Power Consumption of Chip
Θj = ΔT/Pchip

How is heat flow determined?

The heat generated by a chip flows from the transistor junctions where it is generated through the substrate and package. It can be spread across a heat sink, and then carried away through the air by means of convection. Just as current flow is determined by the voltage difference and electrical resistance, the heat flow is determined by temperature difference and thermal resistance.

How to Calculate Thermal Resistance between Junction and Ambient?

Thermal Resistance between Junction and Ambient calculator uses Thermal Resistance between junction and Ambient = Temperature Difference Transistors/Power Consumption of Chip to calculate the Thermal Resistance between junction and Ambient, The Thermal Resistance between junction and ambient formula is defined as the rise in the resistance due to the heating effect in junction. Thermal Resistance between junction and Ambient is denoted by Θj symbol.

How to calculate Thermal Resistance between Junction and Ambient using this online calculator? To use this online calculator for Thermal Resistance between Junction and Ambient, enter Temperature Difference Transistors (ΔT) & Power Consumption of Chip (Pchip) and hit the calculate button. Here is how the Thermal Resistance between Junction and Ambient calculation can be explained with given input values -> 3E-6 = 2.4/0.000797.

FAQ

What is Thermal Resistance between Junction and Ambient?
The Thermal Resistance between junction and ambient formula is defined as the rise in the resistance due to the heating effect in junction and is represented as Θj = ΔT/Pchip or Thermal Resistance between junction and Ambient = Temperature Difference Transistors/Power Consumption of Chip. Temperature Difference Transistors is denoted by ΔT symbol & Power Consumption of Chip is power consumed by the integrated chip when the current flows through it.
How to calculate Thermal Resistance between Junction and Ambient?
The Thermal Resistance between junction and ambient formula is defined as the rise in the resistance due to the heating effect in junction is calculated using Thermal Resistance between junction and Ambient = Temperature Difference Transistors/Power Consumption of Chip. To calculate Thermal Resistance between Junction and Ambient, you need Temperature Difference Transistors (ΔT) & Power Consumption of Chip (Pchip). With our tool, you need to enter the respective value for Temperature Difference Transistors & Power Consumption of Chip 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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