The following table shows the thermal resistance characteristics for the PBGA–ZCE mechanical package.
Table 8-1 Thermal Resistance Characteristics (PBGA Package) [ZCE]
| NO. |
|
|
°C/W(1)
|
AIR FLOW (m/s)(2)
|
| 1 |
RΘJC
|
Junction-to-case |
7.6 |
N/A |
| 2 |
RΘJB
|
Junction-to-board |
11.3 |
N /A |
| 3 |
RΘJA
|
Junction-to-free air |
23.9 |
0.00 |
| 4 |
RΘJMA
|
Junction-to-moving air |
21.2 |
0.50 |
| 5 |
20.3 |
1.00 |
| 6 |
19.5 |
2.00 |
| 7 |
18.6 |
4.00 |
| 8 |
PsiJT
|
Junction-to-package top |
0.2 |
0.00 |
| 9 |
0.3 |
0.50 |
| 10 |
0.3 |
1.00 |
| 11 |
0.4 |
2.00 |
| 12 |
0.5 |
4.00 |
| 13 |
PsiJB
|
Junction-to-board |
11.2 |
0.00 |
| 14 |
11.1 |
0.50 |
| 15 |
11.1 |
1.00 |
| 16 |
11.0 |
2.00 |
| 17 |
10.9 |
4.00 |
(1) These measurements were conducted in a JEDEC defined 2S2P system and will change based on environment as well as application. For more information, see these EIA/JEDEC standards – EIA/JESD51-2, Integrated Circuits Thermal Test Method Environment Conditions - Natural Convection (Still Air) and JESD51-7, High Effective Thermal Conductivity Test Board for Leaded Surface Mount Packages. Power dissipation of 500 mW and ambient temp of 70C assumed. PCB with 2oz (70um) top and bottom copper thickness and 1.5oz (50um) inner copper thickness
(2) m/s = meters per second