Table 7-15 Thermal Resistance
Characteristics for WCSP Package [YFF0111-C01]
THERMAL METRICS(1)(4) |
°C/W(2)(3) |
RΘJC |
Junction-to-case |
0.11 |
RΘJB |
Junction-to-board |
3.9 |
RΘJA |
Junction-to-free air |
21.8 |
PsiJC |
Junction-to-package top |
0.6 |
PsiJB |
Junction-to-board |
3.8 |
(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) Test Condition: Power=1.305W at 25°C