THERMAL METRICS(1) | °C/W(2)(3) |
---|
RΘJC | Junction-to-case | 4.2 |
RΘJB | Junction-to-board | 5.7 |
RΘJA | Junction-to-free air | 20.9 |
RΘJMA | Junction-to-moving air | 14.5(4) |
PsiJT | Junction-to-package top | 0.38 |
PsiJB | Junction-to-board | 5.6 |
(2) °C/W = degrees Celsius per watt.
(3) 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
(4) Air flow = 1 m/s