Altera Device Package Information Data Sheet
Table 6
provides
θ
JA
and
θ
JB
(junction-to-board thermal resistance) values
for Cyclone II devices on a typical board.
Table 6. Thermal Resistance of Cyclone II Devices
Device
EP2C5
EP2C8
EP2C20
Package
F256
F256
F256
F484
θ
JA
(° C/W)
Still Air
30.2
27.9
24.7
20.5
18.8
20.0
17.7
19.0
17.4
16.5
15.7
14.6
θ
JA
(° C/W)
100 ft./min.
25.8
23.2
20.1
16.2
14.5
15.5
13.5
14.6
13.3
12.4
11.7
10.7
θ
JA
(° C/W)
200 ft./min.
22.9
20.5
17.5
13.9
12.3
13.2
11.4
12.3
11.3
10.5
9.8
8.9
θ
JA
(° C/W)
400 ft./min.
20.6
18.4
15.3
12.2
10.6
11.3
9.8
10.6
9.8
9.0
8.3
7.6
θ
JB
(°C/W)
14.8
12.3
9.1
7.2
5.7
5.3
4.5
4.4
5.5
4.6
3.8
3.7
EP2C35
F484
U484
EP2C50
F484
U484
EP2C35
EP2C50
F672
F672
F672
EP2C70
F896
Cyclone
Devices
Table 7
provides
θ
JA
(junction-to-ambient thermal resistance) and
θ
JC
(junction-to-case thermal resistance) values for Cyclone devices.
Table 7. Thermal Resistance of Cyclone Devices (Part 1 of 2)
Device
EP1C3
Pin Count
100
144
Package
TQFP
TQFP
TQFP
PQFP
FBGA
PQFP
FBGA
FBGA
θ
JC
°
11.0
10.0
9.8
4.3
8.8
4.0
6.6
6.1
θ
JA
(
°
C/W)
θ
JA
(
°
C/W)
θ
JA
(
°
C/W)
θ
JA
(
°
C/W)
Still Air
100 ft./min. 200 ft./min. 400 ft./min.
37.5
31.1
29.4
27.2
28.7
26.0
24.3
23.0
35.4
29.4
28.0
24.7
24.5
23.4
20.2
19.8
33.4
27.9
26.7
22.1
22.3
20.8
18.1
17.7
29.8
25.5
24.7
17.8
20.5
17.1
16.4
16.1
EP1C6
144
240
256
EP1C12
240
256
324
6
DS-CYTHRML-3.0
Altera Corporation
ALTERA [ ALTERA CORPORATION ]
