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參數(shù)資料
| 型號： | OCX160-PPT |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | OCX160 Crosspoint Switch |
| 中文描述： | OCX160交叉點開關(guān) |
| 文件頁數(shù)： | 40/44頁 |
| 文件大?。?/td> | 710K |
| 代理商： | OCX160-PPT |
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OCX160 Crosspoint Switch
—
Preliminary Data Sheet
40
[Rev. 1.6] 2/20/01
I-Cube, Inc.
6. Power Consumption
There are two main factors to consider when calculating power consumption for the OCX160:
Power consumed by the chip
Power dissipated by the terminating resistors at the switch differential outputs
The first component, chip power, consists of three integral elements (refer to Figure 22):
1.
Input Power
—
This element is fixed (always ON) due to the DC current for differential outputs.
2.
Core Power
—
This element is the same for LVDS or LVPECL outputs. Core power is a function of
data rate (Mb/s) and the number of connection paths through the switch matrix.
3.
Ouput Power
—
This element is a fixed amount for each differential output. The value is zero if the
Output Enable (OE#) is disabled or set to OFF.
The second component, termination power, is the power dissipated by the terminating resistors at the
switch differential outputs. The value is zero if the Output Enable (OE#) is disabled or set to OFF.
The following diagram shows the chip power elements (as described above), the formulas used for
determining chip power, and the total power consumption as determined by the formula [
Chip Power
+
Termination Power
].
6.1
Power for LVDS I/O
Figure 22 Power Consumption Diagram for the OCX160 using LVDS
CLK
Output
Buffer
Switch
Matrix
Input
Power
(always ON)
Core
Power
Termination
Power
Chip Power
Termination Power
+
R
S
R
S
R
DIV
4mW/Input
+
0.015mW/Mbs/Connection
+
4mW/Output
+
16mW/Output (Load)
Example:
Worst Case = (4mW x 80) + (0.015mW x 667 x 80) + (4mW x 80) + (16mW x 80)
Chip Power
Termination Power
320mW
800mW
320mW
1280mW
+
+
+
= 2.72 watts (total power consumption)
= 1440mW
+
1280mW
Output
Power
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