|
°C/W(1)(2) |
AIR FLOW (lfm)(3) |
| RΘJC |
Junction-to-case |
14 |
0 |
| RΘJB |
Junction-to-board |
13.9 |
0 |
RΘJA
(High k PCB) |
Junction-to-free air |
30 |
0 |
| 21.8 |
150 |
| 20.6 |
250 |
| 19.1 |
500 |
| PsiJT |
Junction-to-package top |
1.24 |
0 |
| 2.63 |
150 |
| 3.15 |
250 |
| 4.05 |
500 |
| PsiJB |
Junction-to-board |
14 |
0 |
| 13.6 |
150 |
| 13.5 |
250 |
| 13.4 |
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