SM320F28335-EP_12 Datasheet, PDF (159/167 Pages) Texas Instruments – Digital Signal Controller (DSC)

SM320F28335-EP
www.ti.com
SPRS581D – JUNE 2009 – REVISED MAY 2012
7 Thermal/Mechanical Data
Table 7-1, Table 7-2, and Table 7-3 show the thermal data. See Section 6.4.3 for more information on
thermal design considerations.
The mechanical package diagram(s) that follow the tables reflect the most current released mechanical
data available for the designated device(s).
Table 7-1. Thermal Model 176-pin PGF Results
PARAMETER
θ_JA[°C/W] High k PCB
Ψ_JT[°C/W]
Ψ_JB
θ_JC
θ_JB
0 lfm
44
0.12
28.1
8.2
28.1
AIR FLOW
150 lfm
34.5
0.48
26.3
250 lfm
33
0.57
25.9
500 lfm
31
0.74
25.2
Table 7-2. Thermal Model 179-pin GHH Results
PARAMETER
θ_JA[°C/W] High k PCB
Ψ_JT[°C/W]
Ψ_JB
θ_JC
θ_JB
0 lfm
32.8
0.09
12.4
8.8
12.5
AIR FLOW
150 lfm
24.1
0.3
11.8
250 lfm
22.9
0.36
11.7
500 lfm
20.9
0.48
11.5
Table 7-3. Thermal Model 176-pin GJZ Results
PARAMETER
θ_JA[°C/W] High k PCB
Ψ_JT[°C/W]
Ψ_JB
θ_JC
θ_JB
0 lfm
29.6
0.2
12.2
11.4
12
AIR FLOW
150 lfm
20.9
0.78
11.6
250 lfm
19.7
0.91
11.5
500 lfm
18
1.11
11.3
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Thermal/Mechanical Data 159