Hi,
Looking at SPRA953C and the TLK10232 datasheet, equation 5 requires RΘJC for the calculation.
Table 10-1. Package Thermal Characteristics
JEDEC STANDARD BOARD |
||
PARAMETER |
VALUE |
|
ΘJA |
Theta-JA |
25.5 |
ΨJT |
Psi-JT |
1.8 |
ΨJB |
Psi-JB |
13.7 |
CUSTOM TYPICAL APPLICATION BOARD(1) |
||
ΘJA |
Theta-JA |
24.5 |
ΨJT |
Psi-JT |
0.9 |
ΨJB |
Psi-JB |
11 |
I can pull RΘCS from thermal grease or gap pad datasheets and RΘSA from a heatsink datasheet, but there isn't a way to calculate RΘJC from φJT or φJB as far as I know.
Thanks,
--Bill