THERMAL METRICS(1)(4) | °C/W(2)(3) |
---|
RΘJC | Junction-to-case | 3.36 |
RΘJB | Junction-to-board | 5.0 |
RΘJA | Junction-to-free air | 17.3 |
ΨJT | Junction-to-top | 0.12 |
ΨJB | Junction-to-board | 4.9 |
(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
A junction temperature of 140°C is assumed.
(4) Air flow = 0m/s