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PDF AG9000-S Data sheet ( Hoja de datos )
| Número de pieza | AG9000-S | |
| Descripción | Power-Over-Ethernet Module | |
| Fabricantes | Silver | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AG9000-S (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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Silver
TELECOM
Pb
V2.4 Dec 2006
Data Sheet
Ag9000-S
Power-Over-Ethernet Module
1. Features
IEEE802.3af compliant
Small SIL package size - 56mm (L) x
14mm (H)
Low output ripple and noise
Input voltage range 36V to 60V
Only one low cost external
decoupling capacitor required
Overload and short-circuit protection
Adjustable Output
High efficiency DC/DC converter
1500V isolation (input to output)
Silver Telecom “design-in” assistance
2. Description
The Ag9000-S 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.
IEEE 802.3af allows for two power options for Category 5 cables and the Ag9000-S series have
two pairs of power inputs pins: - VA1&2 and VB1&2 to accommodate this, see Figure 1.
The Ag9000-S 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 Ag9000 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
regulated low ripple and low noise output. The DC/DC converter also has built-in overload and
short-circuit output protection.
© Silver Telecom 2006
1 page  
V2.4 Dec 2006
Data Sheet
Ag9000-S
Power-Over-Ethernet Module
5. Functional Description
5.1. Inputs
The Ag9000-S has two internal bridge rectifiers (see Figure 1: Block Diagram) connected
to the VA1-VA2 and the VB1-VB2 inputs. This allows the Ag9000-S to be compatible with
equipment that use the different power options, see Figure 3: Typical System Diagram. It
is important that the PSE does not apply power to the VA and VB outputs at the same time
(Refer to IEEE802.3af for more information).
POWER SOURCING
EQUIPMENT (PSE)
PSE
(48V)
+
+/-
TX
4
5
1
2
RX
+/-
-
3
6
7
8
POWERED DEVICE
(PD)
4
5
1
**
RX VA1 VB1
2
DC
OUTPUT
Ag9000-S
3
TX VA2 VB2
6 **
7
8
* The VA and VB inputs must not be used at the same time
Figure 3: Typical System Diagram
5.2. PD Signature
When the Ag9000-S 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
To meet the safety isolation requirements of IEEE802.3af section 33.4.1 a Powered
Device (PD) must pass the electrical strength test of IEC 60950 sub clause 6.2. This calls
for either a) 1500VAC test or b) 1500V impulse test. The Ag9000-S is specified to meet
the 1500V impulse test.
© Silver Telecom 2006
5
5 Page 
V2.4 Dec 2006
Data Sheet
Ag9000-S
Power-Over-Ethernet Module
One simple method for drawing some of the heat away from the Ag9000-S is shown in
Figure 9. Power planes connected to the +VDC and GND pins of the Ag9000-S 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 Ag9000-S must not
be fitted into a socket.
Power
Plane
ADJ
R2 R3
+_
1
VIAnp&utVsBCLRA1SS
Ag9000-S
C1
GND
+VDC
Output
Voltage
Figure 9: Power Plane Heatsink for Ag9000-S
Figure 10, Figure 11 & 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).
6
5
4
3
2
1
-20 -10 0 10 20 30 40 50 60 70
Ambient Temperaure (°C)
Figure 10: Ag9033-S Operating Profile
© Silver Telecom 2006
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet AG9000-S.PDF ] | |
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