PCB thermal calculator

The PCB thermal calculator helps you estimate the junction temperatures of components which use exposed-pad packages. This tool generates a quick estimate of the expected junction temperature based on the copper spreading area on the PCB.

Temperature vs. PCB copper coverage area

Click on the legend to toggle series in the chart.

Show board temperature

Application note

Semiconductor and IC Package Thermal Metrics (Rev. D)

PDF | HTML

Application note

PowerPAD™ Thermally Enhanced Package (Rev. H)

PDF

Application note

Using Thermal Calculation Tools for Analog Components (Rev. A)

PDF

Enter/select a device Theta JC, Bottom 0.3 °C/W Thermal resistance from the junction of the device to the exposed pad on the bottom of the device. Enter device power dissipation W Select system reference temperature °C Ambient = air temperature away from system/device (not heated by the system) Board = temperature of the board 1mm away from the device