Table 6-2 Thermal Resistance Characteristics TI recommends performing system level thermal simulations with worst case device power consumption.
NO. |
PARAMETER(1) |
DESCRIPTION |
°C/W(2) |
AIR FLOW (m/s)(3) |
ALV Package |
T1 |
RΘJC |
Junction-to-case |
0.98 |
N/A |
T2 |
RΘJB |
Junction-to-board |
3.87 |
N/A |
T3 |
RΘJA |
Junction-to-free air |
12.8 |
0 |
T4 |
RΘJA |
Junction-to-moving air |
9.2 |
1 |
T5 |
8.2 |
2 |
T6 |
7.6 |
3 |
T7 |
ΨJT |
Junction-to-package top |
0.53 |
0 |
T8 |
0.55 |
1 |
T9 |
0.57 |
2 |
T10 |
0.58 |
3 |
T11 |
ΨJB |
Junction-to-board |
3.74 |
0 |
T12 |
3.5 |
1 |
T13 |
3.4 |
2 |
T14 |
3.3 |
3 |
(1) These values are based on a JEDEC defined 2S2P system (with the exception of the Theta JC [RΘJC] value, which is based on a JEDEC defined 1S0P system) and is subject to change based on environment as well as application. For more information, see the EIA/JEDEC standards.
- JESD51-2, Integrated Circuits Thermal Test Method Environment Conditions - Natural Convection (Still Air)
- JESD51-3, Low Effective Thermal Conductivity Test Board for Leaded Surface Mount Packages
- JESD51-6, Integrated Circuit Thermal Test Method Environmental Conditions - Forced Convection (Moving Air)
- JESD51-7, High Effective Thermal Conductivity Test Board for Leaded Surface Mount Packages
- JESD51-9, Test Boards for Area Array Surface Mount Packages
(2) °C/W = degrees Celsius per watt.
(3) m/s = meters per second.