Silver Ag9400

V1.1 Aug 2008
Data Sheet
Silver
Ag9400
TELECOM
Power-Over-Ethernet Module
Pb
1. Features
¾ IEEE802.3af compliant
¾ Small SIL package size - 56mm (L) x
14mm (H)
¾ Low cost
¾ Input voltage range 36V to 57V
¾ Minimal (low cost) external
components required
¾ Short-circuit protection
¾ Adjustable Output
¾ 1500V isolation (input to output)
¾ Silver Telecom “design-in” assistance
2. Description
The Ag9400 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 Ag9400 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 Ag9400 provides a Class 0 signature.
The DC/DC converter operates over a wide input voltage range and provides a regulated
output. The DC/DC converter also has built-in short-circuit output protection.
© Silver Telecom 2008
V1.1 Aug 2008
Data Sheet
Ag9400
Power-Over-Ethernet Module
Table of Contents
1. Features...........................................................................................................................1
2. Description.......................................................................................................................1
Table of Contents.............................................................................................................2
Table of Figures ...............................................................................................................2
3. Ag9400 Product Selector .................................................................................................3
4. Pin Description.................................................................................................................4
4.1. Ag9400-S ..................................................................................................................4
4.2. Ag9400-2BR..............................................................................................................5
5. Functional Description .....................................................................................................6
5.1. Inputs ........................................................................................................................6
5.2. PD Signature.............................................................................................................6
5.3. Isolation.....................................................................................................................6
5.4. Power Classification ..................................................................................................7
5.5. DC/DC Converter ......................................................................................................7
5.6. Output Adjustment.....................................................................................................7
5.7. Typical Connections ..................................................................................................8
6. Typical Application ...........................................................................................................9
7. Typical Recommendations.............................................................................................10
8. Operating Temperature Range ......................................................................................10
9. Protection.......................................................................................................................13
10. Electrical Characteristics..............................................................................................13
10.1. Absolute Maximum Ratings1 .................................................................................13
10.2. Recommended Operating Conditions ...................................................................13
10.3. DC Electrical Characteristics.................................................................................14
11. Package.......................................................................................................................15
Table of Figures
Figure 1: Block Diagram ......................................................................................................3
Figure 2: Ag9400 Package Format ......................................................................................4
Figure 3: Typical System Diagram.......................................................................................6
Figure 4: Output Adjustment ................................................................................................7
Figure 5: Typical Connection Diagram.................................................................................8
Figure 6: Typical Application................................................................................................9
Figure 7: Typical Layout.....................................................................................................10
Figure 8: Power Plane Heatsink for Ag9400 ......................................................................11
Figure 9: Ag9403 Operating Profile ...................................................................................11
Figure 10: Ag9405 Operating Profile .................................................................................12
Figure 11: Ag9412 Operating Profile .................................................................................12
© Silver Telecom 2008
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Ag9400
V1.1 Aug 2008
Data Sheet
Power-Over-Ethernet Module
3. Ag9400 Product Selector
Part Number†
Ag9412-S
Ag9405-S
Ag9403-S
Nominal Output Voltage
12.0V
5.0V
3.3V
Maximum Output Power *
12 Watts
10 Watts
6.6 Watts
Marking
12
5
3
Ag9412-2BR
Ag9405-2BR
Ag9403-2BR
12.0V
5.0V
3.3V
12 Watts
10 Watts
6.6 Watts
12 2BR
5 2BR
3 2BR
*At 25°C with VIN = 48V
† The Ag9400 fully meets the requirements of the RoHS directive 2002/95/EC on the restriction of hazardous substances in electronic
equipment.
Table 1: Ordering Information
The Ag9400-2BR is physically the same size as the Ag9400-S but it has the two input
bridge rectifiers on-board (see Figure 1).
Ag9400-2BR
~
VA1
Input
~
~
VB1
VB2
+
Ag9400-S
ADJ
VIN+
+VDC
+VDC
~
VA2
Input
~
-
~
-
~
Signature
& Control
+
+
DC:DC
Converter
C1
470uF
~
-VDC
VIN-
DC
Output
-VDC
Figure 1: Block Diagram
© Silver Telecom 2008
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Ag9400
V1.1 Aug 2008
Data Sheet
Power-Over-Ethernet Module
Figure 2: Ag9400 Package Format
4. Pin Description
4.1. Ag9400-S
Pin #
Name
Description
1
VIN+
2
VIN-
3
VIN+
Direct Input +. Internally connected to pin 1.
4
VIN-
Direct Input -. Internally connected to pin 2.
5
IC
Internal Connection. Do not connect to this pin.
6
NC
No Connection.
7
-VDC
8
+VDC
9
ADJ
10
IC
Direct Input +. This pin connects to the positive (+) output of the
input bridge rectifiers (internally connected to pin 3).
Direct Input -. This pin connects to the negative (-) output of the
input bridge rectifiers (internally connected to pins 4 and 5).
DC Return. This pin is the return path for the +VDC output.
DC Output. This pin provides the regulated output from the
DC/DC converter.
Output Adjust. The output voltage can be adjusted from is
nominal value, by connecting an external resistor from this pin to
either the +VDC pin or the -VDC pin.
Internal Connection. Do not connect to this pin.
Table 2: Pin Description
© Silver Telecom 2008
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Ag9400
V1.1 Aug 2008
Data Sheet
Power-Over-Ethernet Module
4.2. Ag9400-2BR
Pin #
Name
Description
1
VA1
2
VA2
3
VB1
4
VB2
5
IC
Internal Connection. Do not connect to this pin.
6
NC
No Connection.
7
-VDC
8
+VDC
9
ADJ
10
IC
RX Input (1). This input pin is used in conjunction with VA2 and
connects to the centre tap of the transformer connected to pins 1
& 2 of the RJ45 connector (RX) - it is not polarity sensitive.
TX Input (2). This input pin is used in conjunction with VA1 and
connects to the centre tap of the transformer connected to pins 3
& 6 of the RJ45 connector (TX) - it is not polarity sensitive.
Direct Input (1). This input pin is used in conjunction with VB2
and connects to pin 4 & 5 of the RJ45 connector - it is not polarity
sensitive.
Direct Input (2). This input pin is used in conjunction with VB1
and connects to pin 7 & 8 of the RJ45 connector - it is not polarity
sensitive.
DC Return. This pin is the return path for the +VDC output.
DC Output. This pin provides the regulated output from the
DC/DC converter.
Output Adjust. The output voltage can be adjusted from is
nominal value, by connecting an external resistor from this pin to
either the +VDC pin or the -VDC pin.
Internal Connection. Do not connect to this pin.
Table 3: Pin Description
© Silver Telecom 2008
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Ag9400
V1.1 Aug 2008
Data Sheet
Power-Over-Ethernet Module
5. Functional Description
5.1. Inputs
The Ag9400 is compatible with equipment that uses the different power options, see
Figure 3: Typical System Diagram. It is specified that the PSE does not apply power to
both outputs at the same time (Refer to IEEE802.3af for more information).
Figure 3: Typical System Diagram
5.2. PD Signature
When the Ag9400 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 Ag9400 is specified to meet the
1500Vdc impulse test. It is also important that the tracks on either side of the isolation
barrier have at least a 3mm clearance, see Figures 7 & 8 and Section 11 for more
information.
© Silver Telecom 2008
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Ag9400
V1.1 Aug 2008
Data Sheet
Power-Over-Ethernet Module
5.4. Power Classification
The Ag9400 is fixed for Class 0 (0.44 Watts to 12.95 Watts) operation. Should Class
programming be required refer to other Silver Telecom POE products such as the Ag9200.
5.5. DC/DC Converter
The Ag9400’s DC/DC converter provides a regulated low ripple and low noise output that
has built-in short-circuit output protection – refer Table 1: Ordering information for voltage
and power ratings
5.6. Output Adjustment
The Ag9400 has an ADJ pin, which allows the output voltage to be increased or decreased
from its nominal value. Figure 4: Output Adjustment shows how the ADJ pin is connected.
Ag9400
Ag9400
+VDC
+VDC
R
ADJ
ADJ
R
-VDC
Reducing the output
voltage from nominal
-VDC
Increasing the output
voltage from nominal
Figure 4: Output Adjustment
Reducing the output voltage, connect R between ADJ and +VDC
Value of R
Ag9403 output
Ag9405 output
Ag9412 output
Open Circuit
3.3V
5.00V
12.0V
0 Ohms
2.8V
4.4V
9.8V
Increasing the output voltage, connect R between ADJ and -VDC
Value of R
Ag9403 output
Ag9405 output
Ag9412 output
Open Circuit
3.3V
5.00V
12.0V
0 Ohms
3.7V
5.7V
12.7V
Table 2: Output Adjustment Resistor (R) Value
© Silver Telecom 2008
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Ag9400
V1.1 Aug 2008
Data Sheet
Power-Over-Ethernet Module
5.7. Typical Connections
The Ag9400 requires minimal external components as shown in Figure 5: Typical
Connection Diagram.
C1 must be fitted, it should be a minimum of 470µF, and positioned as close to the output
pins as possible. Its value is related to the maximum load step change that the output
needs to drive. For example, in an application were the output needs to cope with high
load step changes, the value may need to be increased to a minimum of 1000µF. This can
be a standard low cost electrolytic and does not need to be a low ESR type.
Figure 5 shows a 16V capacitor that would cover all product variants up to and including
the Ag9412, see Table 1: Ordering Information
The Output Adjust inputs are optional and are provided to give great flexibility to the
Ag9400 product range. Further information on using these inputs can be found in section
5.6. Output Adjustment.
RJ-45
Ag9400-2BR
4
VB1
~
5
7
BR1
~
VB2
Ag9400-S
+
ADJ
VIN+
8
+VDC
VA1
1
~
-
RX
BR2
+
+
Output
C1
470µF 16V
~
2
-VDC
VA2
VIN-
3
TX
6
Figure 5: Typical Connection Diagram
© Silver Telecom 2008
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Ag9400
V1.1 Aug 2008
Data Sheet
Power-Over-Ethernet Module
6. Typical Application
The Ag9400 can be used in numerous applications, in the example shown in Figure 6:
Typical Application, the data outputs from the switch are connected to the inputs of a
midspan. The midspan will then add power (to the data) on each output that supports
Power over Ethernet (PoE).
In this example port 1 is connected to an ethernet camera and port 2 is connected to a
wireless access point, both of these devices have a built-in Ag9400. When the midspan is
switched on (or when the device is connected), the midspan will check each output for a
PoE signature. On ports 1 and 2 the Ag9400 will identify themselves as PoE enabled
devices and the midspan will supply both data and power to these peripherals.
The other ports (shown in this example) will not have a PoE signature and the midspan will
only pass the data through to these peripherals. The midspan will continuously monitor
each output to see if a PoE enabled device has been added or removed.
8
1
Switch
Patch Cables
8
1 Midspan Equipment
Ethernet
Camera
Ag9400
Wireless
Access Point
PC's and other non
PoE peripherals
Figure 6: Typical Application
© Silver Telecom 2008
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Ag9400
V1.1 Aug 2008
Data Sheet
Power-Over-Ethernet Module
7. Typical Recommendations
Figure 7: Typical Layout gives an example of the tracking needed for the Ag9400. R1 and
R2 are optional components, C1 must be fitted. The thermal performance of the Ag9400
can be improved by increasing the surface area of the output tracks (+VDC and -VDC).
This is not applicable if the Ag9400 is in a socket.
Keep out area
ADJ
R1 R2
Ag9400
1
C1
INPUTS
Output
Voltage
Figure 7: Typical Layout
8. Operating Temperature Range
Because the Ag9400 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 Ag9400 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 Ag9400 has a maximum ambient operating temperature of 70OC see Figure 9.
These results are in still air without any heatsinking, the performance of the Ag9400 can
be improved by forcing the airflow over the part or by using a heatsink (see the Ag9400
application note on heatsinking for more information).
The output stage of the Ag9400 has no built-in thermal protection, to prevent the module
from being damaged it is recommended that the module be powered by an IEEE 802.3af
compliant PSE or Midspan equipment. However the Ag9400 may be powered by a user
designed power supply which should include thermal and over current protection.
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 Ag9400 and a direct airflow if possible.
© Silver Telecom 2008
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Ag9400
V1.1 Aug 2008
Data Sheet
Power-Over-Ethernet Module
One simple method for drawing some of the heat away from the Ag9400 is shown in
Figure 8. Power planes connected to the +VDC and -VDC pins of the Ag9400 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 Ag9400 must not be
fitted into a socket.
Output Power (W)
Figure 8: Power Plane Heatsink for Ag9400
Figure 9: Ag9403 Operating Profile
© Silver Telecom 2008
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Ag9400
V1.1 Aug 2008
Data Sheet
Output Power (W)
Power-Over-Ethernet Module
Output Power (W)
Figure 10: Ag9405 Operating Profile
Figure 11: Ag9412 Operating Profile
© Silver Telecom 2008
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Ag9400
V1.1 Aug 2008
Data Sheet
Power-Over-Ethernet Module
9. Protection
The Ag9400 must be protected from over-voltages exceeding the 80V maximum rated
surge input voltage. An inexpensive but effective solution can be achieved by connect
Tranzorb diodes across each of the inputs; see Apps Note “ANX-POE-Protection”.
10. Electrical Characteristics
10.1. Absolute Maximum Ratings1
Parameter
1
DC Supply Voltage
2
DC Supply Voltage Surge for 1ms
3
Storage Temperature
Symbol
Min
Max
Units
VCC
-0.3
60
V
VSURGE
-0.6
80
V
TS
-40
+100
O
C
Note 1: Exceeding the above ratings may cause permanent damage to the product. Functional operation under these conditions is not
implied. Maximum ratings assume free airflow.
10.2. Recommended Operating Conditions
Parameter
Symbol
Min
Typ
Max
Units
48
57
V
36
V
70
Ta / OC
1
Input Supply Voltage1
VIN
36
2
Under Voltage Lockout
VLOCK
30
3
Operating Temperature2
TOP
-20
25
Note 1: With minimum load
2: See Section 8. Operating Temperature Range
© Silver Telecom 2008
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Ag9400
V1.1 Aug 2008
Data Sheet
Power-Over-Ethernet Module
10.3. DC Electrical Characteristics
DC Characteristic
Sym
Min
Typ1
Max
Units
1
Nominal Output Voltage
+VDC
3.1
4.75
11.5
3.3
5.0
12.0
2
Output Current (VIN = 48V)
PWR
3.5
5.25
12.5
2
2
1.0
V
V
V
A
A
A
Test
Comments
Ag9403
Ag9405
Ag9412
Ag9403
Ag9405
Ag9412
3
Line Regulation
VLINE
0.1
%
@ 50% Load
4
Load Regulation
VLOAD
1
%
@ VIN=48V
5
Output Ripple and Noise
VRN
100
mVp-p
6
Minimum Load
7
Short-Circuit Duration3
RLOAD
200
200
100
mA
mA
mA
TSC
8
Efficiency @ 80% Load
EFF
9
Isolation Voltage (I/O)
VISO
10
Temperature Coefficient
TC
∞
79
84
87
0.02
Ag9403
Ag9405
Ag9412
sec
%
%
%
1500
@ Max load2
VPK
%
Ag9403
Ag9405
Ag9412
Impulse Test
Per OC
Note 1: Typical figures are at 25°C with a nominal 48V supply and are for design aid only. Not Guaranteed
2: The output ripple and noise can be reduced with an external filter, see application note.
3: Continuous short circuit duration is applicable at 25'C ambient temperature in free air. At higher temperatures or with restricted
airflow (e.g. in a sealed enclosure) the duration will need to be limited to avoid overheating.
© Silver Telecom 2008
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Ag9400
V1.1 Aug 2008
Data Sheet
Power-Over-Ethernet Module
11. Package
56.0
18.0 (max)
14.0
3.0
13.5
Ag9400
1
3.0
0.6 ± 0.05
1.8 ± 0.25 2.54 ± 0.05
7.0 (max)
Isolation Barrier
30.48 ± 0.25
0.6 ± 0.05
(Recommended PCB hole diameter = 1.1 ± 0.05)
Dimensions (in mm) are nominal unless otherwise stated
Information published in this datasheet is believed to be correct and accurate. Silver Telecom assumes no liability for errors which may
occur or for liability otherwise arising out of use of this information or infringement of patents which may occur as a result of such use.
No license is granted by this document under patents owned by Silver Telecom or licensed from third parties by Silver Telecom. The
products, their specification and information appearing in this document are subject to change by Silver Telecom without notice.
© Silver Telecom 2008
15