PCB Temperature Calculator

This PCB thermal analysis calculator is used to estimate the junction temperature rise of an exposed pad device attached to a printed circuit board (PCB). The calculator computes the total junction to ambient PCB thermal resistance due to the conduction, convection and radiation.

Thermal analysis of the PCB is conducted by computing the equivalent thermal conductivity of the PCB based on the copper coverage area, number and thickness of the PCB layers, size of the attached device and strength of convection and radiation from the surface of the PCB. Reference the blog article, How to calculate the thermal resistance of a PCB for details regarding the calculation methodology.

PCB Layers

Air Flow

Device

Via

Heat Sink

Calculate

PCB Dimensions

L: mm

W: mm

PCB Layers

Number of Layers: 1 2 4 6

Material	Thickness [mm]	% Coverage	Device
Copper			L1
FR-4/Pre-preg		-

Ambient Temperature: °C

PCB Emissivity: 

Flow

Natural Convection

Forced Convection

Velocity: m/s

Device Specifications

W_p: mm

L_p: mm

P: Watts

θ_jb: °C/W

θ_jc(top): °C/W

emissivity: 

Thermal Vias

d_via: mm

t_via: mm

k_via: W/(m⋅K)

Via Pattern I

Via Pattern II

s: mm

Filled Thermal Vias

k_filler: W/(m⋅K)

Heat Sink

Attached to PCB

Attached to device

R_hs: °C/W

Thermal interface material

t_int: mm

k_int: W/(m·K)

Results

Oops....An error occured during the calculations. Check your inputs.

°C

Junction Temperature

°C/W

Junction to Ambient
Thermal Resistance

Dissipation from PCB surface :

W

Dissipation from device top :

W

Dissipation from heatsink :

W