THERMAL METRICS(1) | °C/W(2)(3) | AIR FLOW (m/s)(4) |
---|
RΘJC | Junction-to-case | 6.3 | 0.0051 |
RΘJB | Junction-to-board | 2.4 | 0.0051 |
RΘJA | Junction-to-free air | 23 | 0.0051 |
RΘJMA | Junction-to-moving air | 14.6 | 0.765 |
12.4 | 1.275 |
10.8 | 2.55 |
PsiJT | Junction-to-package top | 0.2 | 0.0051 |
0.2 | 0.765 |
0.3 | 1.275 |
0.1 | 2.55 |
PsiJB | Junction-to-board | 2.3 | 0.0051 |
2.3 | 0.765 |
2.2 | 1.275 |
2.4 | 2.55 |
(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
Power dissipation of 2 W and an ambient temperature of 70°C is assumed.
(4) m/s = meters per second.