Figure 5-6. Thermal Dissipation With Heatsink
STPC® ATLAS
Board
) Ambient
ct(s Case
rodu Junction
P Board
Obsolete Product(s) - Obsolete Ambient
Junction
Rca
3
Rjc
Board
8.5
Rjb
6
Case
50
Rba
Ambient
Rja = 9.5 °C/W
Board dimensions:
- 10.2 cm x 12.7 cm
- 4 layers (2 for signals, 1 GND, 1VCC)
The PBGA is centred on board
There are no other devices
1 via pad per ground ball (8-mil wire)
40% copper on signal layers
Copper thickness:
- 17µm for internal layers
- 34µm for external layers
Airflow = 0
Board temperature taken at the centre balls
Heat sink is 11.1°C/W
71/108
1