S1K50000 Epson Electronics America, Inc., S1K50000 Datasheet - Page 92

• Manufacturer Part Number: S1K50000
• Description: Design Guide S1k50000 Series
• Manufacturer: Epson Electronics America, Inc.

7.2 Limitations on Power Consumption
STANDARD CELL S1K50000 SERIES
DESIGN GUIDE
The chip temperature of LSIs increases in proportion to their power consumption. The chip
temperature of a package-mounted LSI can be calculated based on its ambient temperature
Ta, the package’s thermal resistance q, and power dissipation PD.
Under normal operating conditions, we recommend using LSIs at a chip temperature (Tj) of
approximately 125°C or less.
The thermal resistance of each package is listed in Table 7-3. The thermal resistance of
packages, as shown in Table 7-3, fluctuates significantly depending on how the chip is
mounted on the board and whether the chip is heat-radiated by a fan.
CFLGA
ALLOY42
CFLGA424
CFLGA307
CFLGA239
CFLGA152
CFLGA104
QFP5
QFP5
QFP8
QFP8
QFP12
QFP13
QFP14
QFP15
QFP20
TQFP14
TQFP14
TQFP15
Package
PKG
type
Chip temperature (Tj) = Ta + (PD
Table 7-3 Thermal Resistance of Each Package (single unit in a suspended state)
(Board installation under the windless condition)
100
128
128
208
100
144
100
100
PIN
48
64
80
80
Customer's
board size
75 mm
50 mm
30 mm
75 mm
50 mm
30 mm
75 mm
50 mm
30 mm
75 mm
50 mm
30 mm
75 mm
50 mm
30 mm
110( C/W)
0 m/sec
230
170
110
100
100
110
115
110
65
45
85
j-a
3.82 mm
44.0( C/W)
3.82 mm
46.9
61.1
44.0
47.1
61.7
44.0
47.3
62.2
44.8
48.8
63.3
45.5
50.3
64.3
1 m/sec
75
75
50
70
j-a
–
–
–
–
–
–
–
–
Chip Size
5.73 mm
5.73 mm
32.9
36.4
50.1
33.1
37.4
51.5
33.1
38.3
52.9
34.4
39.7
53.9
35.6
41.1
54.9
2 m/sec
60
60
45
50
j-a
–
–
–
–
–
–
–
–
9.55 mm
9.55 mm
3 m/sec
24.6
27.8
42.1
24.9
28.5
43.1
25.1
29.2
43.9
55
55
35
40
–
–
–
–
–
–
j-a
–
–
–
–
–
–
–
–
EPSON
) (°C)
Cu-L/F
PBGA
QFP5
QFP5
QFP5
QFP8
QFP8
QFP10
QFP12
QFP13
QFP14
QFP15
QFP20
QFP21
QFP21
QFP22
QFP22
QFP23
QFP23
TQFP12
TQFP13
TQFP15
TQFP24
HQFP5
HQFP8
H2QFP8
H2QFP23
H3QFP15
PBGA
PBGA
PBGA
PKG
PKG
100
128
160
256
304
100
184
176
216
208
256
184
240
128
144
128
160
208
240
128
225
256
388
PIN
PIN
80
48
64
80
48
64
Chapter 7: Estimating Power Consumption
72( C/W)
85( C/W)
0 m/sec
0 m/sec
175
130
165
140
105
110
80
80
45
50
35
90
65
55
55
45
45
40
40
80
60
32
34
30
85
53
45
j-a
j-a
1 m/sec
1 m/sec
120
55
55
55
32
20
80
35
35
19
46
33
j-a
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
j-a
–
2 m/sec
2 m/sec
45
35
35
25
16
90
55
25
25
12
37
25
j-a
j-a
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
3 m/sec
3 m/sec
40
30
30
23
80
50
23
23
10
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
j-a
j-a
–
–
–
87