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參數(shù)資料
| 型號(hào)： | AG8200 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Power-Over-Ethernet Module |
| 中文描述： | 供電以太網(wǎng)模塊 |
| 文件頁(yè)數(shù)： | 10/16頁(yè) |
| 文件大?。?/td> | 274K |
| 代理商： | AG8200 |
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V1.0 Dec 2006
Data Sheet
Ag8200
Power-Over-Ethernet Module
7. Typical Recommendations
Figure 8: Typical Layout gives an example of the tracking needed for the Ag8200. R1, R2
and R3 are optional components, but C1 needs to be positioned close to the output pins of
the Ag8200 as possible to minimise the current loop. The thermal performance of the
Ag8200 can be improved by increasing the surface area of the output tracks (+VDC and -
VDC) this is not applicable if the Ag8200 is in a socket.
Figure 8: Typical Layout
8. Operating Temperature Range
Because the Ag8200 is a power component, it will generate heat, so it is important that this
be taken into consideration at the design stage.
The heart of the Ag8200 is a DC/DC converter, which like any other power supply will
generate heat. The amount of heat generated by the module will depend on the load it is
required to drive and the input voltage supplied by the PSE. The information shown within
this section of datasheet is referenced to a nominal 48Vdc input voltage supplied by the
PSE.
The Ag8200 has a maximum ambient operating temperature of 70
O
C see Figure 10,
Figure 11 & Figure 12. These results are in still air without any heatsinking, the
performance of the Ag8200 can be improved by forcing the airflow over the part or by
using a heatsink (see the Ag8200 application note on heatsinking for more information).
The Ag8200 has built-in thermal protection, to prevent the module from being damaged if
operated beyond its power / temperature specification. If the thermal protection circuit is
activated then the DC/DC converter will shut down and will remain off until the input
voltage is removed and reapplied. In shut down mode the Ag8200 input current will be less
than 5mA, which is below the PSE output hold current. The PSE will assume that the
Ag8200 has been disconnected and will switch its output off and will return to testing for a
correct signature. The thermal protection circuit will continue to disable the DC/DC
converter until the Ag8200 temperature has cooled sufficiently.
Silver Telecom 2005
10
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