參數(shù)資料
型號: 82546EB
廠商: Intel Corp.
英文描述: Dual Port Gigabit Ethernet Controller
中文描述: 雙端口千兆以太網(wǎng)控制器
文件頁數(shù): 39/47頁
文件大小: 281K
代理商: 82546EB
Networking Silicon —
82546EB
Datasheet
33
5.3
Thermal Specifications
The 82546EB device is specified for operation when the ambient temperature (TA) is within the
range of 0 C to 55 C. The maximum permitted junction temperature is 120 C.
TC (case temperature) is calculated using the equation:
TC = TA + P (qJA - q JC)
TJ (junction temperature) is calculated using the equation:
TJ = TA + P qJA
The power consumption (P) is calculated by using the typical ICC and nominal VCC. The thermal
resistances are shown in
Table 21
.
Thermal resistances are determined empirically with test devices mounted on standard thermal test
boards. Real system designs may have different characteristics due to board thickness, arrangement
of ground planes, and proximity of other components. The case temperature measurements should
be used to assure that the 82546EB device is operating under recommended conditions.
Table 21. Thermal Characteristics
Symbol
Parameter
Value at specified airflow (m/s)
Units
0
1
2
3
qJA
Thermal resistance, junction-to-
ambient
17.7
15.6
14.8
14.0
C/Watt
qJC
Thermal resistance, junction-to-
case
6.8
6.8
6.8
6.8
C/Watt
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