(FOLSVH,, )DPLO\ 'DWD 6KHHW 5HY %
3DFNDJH 7KHUPDO &KDUDFWHULVWLFV
Thermal Resistance Equations:
θJC = (TJ - TC)/P
θJA = (TJ - TA)/P
PMAX = (TJMAX - TAMAX)/ θJA
Parameter Description:
θJC: Junction-to-case thermal resistance
θJA: Junction-to-ambient thermal resistance
TJ: Junction temperature
TA: Ambient temperature
P: Power dissipated by the device while operating
PMAX: The maximum power dissipation for the device
TJMAX: Maximum junction temperature
TAMAX: Maximum ambient temperature
NOTE: 0D[LPXP MXQFWLRQ WHPSHUDWXUH 7-0$; LV & 7R FDOFXODWH WKH PD[LPXP SRZHU
GLVVLSDWLRQ IRU D GHYLFH SDFNDJH ORRN XS θ-$ IURP 7DEOH SLFN DQ DSSURSULDWH 7$0$;
DQG XVH
PMAX = (150º C - TAMAX)/ θJA
7DEOH 3DFNDJH 7KHUPDO &KDUDFWHULVWLFV
3DFNDJH 'HVFULSWLRQ θJA &: # YDULRXV IORZ UDWHV PVHF θJC &:
3LQ &RXQW 3DFNDJH 7\SH
484
PBGA
28.0
26.0
25.0
23.0
9.0
280
LF-PBGA
18.5
17.0
15.5
14.0
7.0
208
PQFP
26.0
24.5
23.0
22.0
11.0
Preliminary 4XLFN/RJLF &RUSRUDWLRQ
ZZZTXLFNORJLFFRP