| °C/W(1)(2) | AIR FLOW (lfm)(3) |
---|
RΘJC | Junction-to-case | 10.3 | 0 |
RΘJB | Junction-to-board | 21.2 | 0 |
RΘJA (High k PCB) | Junction-to-free air | 40.8 | 0 |
32.4 | 150 |
31.0 | 250 |
29.1 | 500 |
PsiJT | Junction-to-package top | 0.4 | 0 |
0.5 | 150 |
0.6 | 250 |
0.8 | 500 |
PsiJB | Junction-to-board | 21.0 | 0 |
20.4 | 150 |
20.2 | 250 |
19.9 | 500 |
(1) °C/W = degrees Celsius per watt
(2) These values are based on a JEDEC-defined 2S2P system (with the exception of the Theta JC [RΘ
JC] value, which is based on a JEDEC-defined 1S0P system) and will change based on environment as well as application. For more information, see these EIA/JEDEC standards:
- JESD51-2, Integrated Circuits Thermal Test Method Environmental Conditions - Natural Convection (Still Air)
- JESD51-3, Low Effective Thermal Conductivity Test Board for Leaded Surface Mount Packages
- JESD51-7, High Effective Thermal Conductivity Test Board for Leaded Surface Mount Packages
- JESD51-9, Test Boards for Area Array Surface Mount Package Thermal Measurements
(3) lfm = linear feet per minute