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PDF AG8200 Data sheet ( Hoja de datos )
| Número de pieza | AG8200 | |
| Descripción | Power-Over-Ethernet Module | |
| Fabricantes | Silver | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AG8200 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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Silver
TELECOM
Pb
V1.0 Dec 2006
Data Sheet
Ag8200
Power-Over-Ethernet Module
1. Features
¾ IEEE802.3af compliant
¾ Small package size - 56mm (L) x
14mm (H)
¾ Input voltage range 37V to 57V
¾ Overload and short-circuit protection
¾ Adjustable Output - 3 product
variants cover all voltages from 2.5V
to 14V
¾ Thermal Cut Off
¾ High efficiency DC/DC converter
¾ Silver Telecom “design-in” assistance
2. Description
The Ag8200 series of modules are designed to extract power from a conventional twisted pair
Category 5 Ethernet cable, conforming to the IEEE 802.3af Power-over-Ethernet (PoE)
standard.
The Ag8200 signature and control circuit provides the PoE compatibility signature and power
classification required by the Power Sourcing Equipment (PSE) before applying up to 15W
power to the port. The Ag8200 is compatible with Class 0 to Class 3 equipment.
The high efficiency DC/DC converter operates over a wide input voltage range and provides a
non-isolated regulated low ripple and low noise output. The DC/DC converter also has built-in
output overload, output short-circuit and over-temperature protection.
© Silver Telecom 2005
1 page  
V1.0 Dec 2006
Data Sheet
Ag8200
Power-Over-Ethernet Module
5. Functional Description
5.1. Inputs
The Ag8200 has a single input that can be connected to two external bridge rectifiers (see
Figure 1). This allows the Ag8200 to be compatible with equipment that use the different
power options, see Figure 3. It is important that the PSE does not apply power to both
bridge rectifiers at the same time (Refer to IEEE802.3af for more information).
Figure 3: Typical System Diagram
5.2. PD Signature
When the Ag8200 is connected to the Cat 5e cable, it will automatically present a Powered
Device (PD) signature to the Power Sourcing Equipment (PSE) or Midspan Equipment,
when requested. The equipment will then recognise that a powered device is connected to
that line and supply power.
5.3. Isolation
The Ag8200 series conforms to the IEEE 802.3af standard except for the 1500V isolation,
which must be done externally. This is usually achieved without additional components, by
using a plastic insulating enclosure. Contact Silver Telecom for further details.
© Silver Telecom 2005
5
5 Page 
V1.0 Dec 2006
Data Sheet
Ag8200
Power-Over-Ethernet Module
Because each application is different it is impossible to give fixed and absolute thermal
recommendations. However it is important that any enclosure used has sufficient
ventilation for the Ag8200 and a direct airflow if possible.
One simple method for drawing some of the heat away from the Ag8200 is shown in
Figure 9. Power planes connected to the +VDC and GND pins of the Ag8200 can be used
to draw heat away from the DC/DC converter via the output pins.
These power planes must be on the outer layers of the PCB and the Ag8200 must not be
fitted into a socket (this example is suitable for both –S and –D variants).
Figure 9: Power Plane Heatsink for Ag8200-S
Figure 10, Figure 11 and Figure 12 show the maximum ambient temperature under
different load conditions. These figure have been recorded in a sealed enclosure (in still
air) using a heater element to elevate the ambient temperature (within the enclosure).
9. Over-voltage
The Ag8200 may be damaged by voltage inputs greater than 80V. If protection from
electrostatic discharge (ESD) or other high voltage transients is required it is
recommended that an over-voltage clamping device is fitted between the VIN+ and the
VIN- pins. Typically an SMAJ58 will be sufficient.
© Silver Telecom 2005
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet AG8200.PDF ] | |
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