Ag5200 Datasheet

V1.2 Sept 2014
Datasheet
Silvertel
Ag5200
Power-over-Ethernet Plus Module
1 Features
Pb
¾ IEEE802.3at and IEEE802.3af
compliant
¾ Maximum 30W output power
¾ Dual In-Line (DIL) package size –
50.6mm (L) x 30mm (W)
¾ Overload, short-circuit and thermal
protection
¾ Adjustable output voltage
¾ Minimal (low cost) external
components
¾ Low output ripple & noise
¾ High efficiency DC/DC converter
¾ 1500Vdc isolation (input to output)
¾ Silvertel “design-in” assistance
2 Description
The Ag5200 Power-over-Ethernet (PoE) module is designed to extract power from a conventional
twisted pair Category 5 Ethernet cable, conforming to the IEEE 802.3at PoE standard.
The Ag5200 has been designed to extract power from Power Sourcing Equipment (PSE) over a
conventional twisted pair Category 5 Ethernet cable. The modules input conform to the
IEEE803.2at standard for signature recognition and class programming.
The high efficiency DC/DC converter operates over a wide input voltage range with a low ripple
and low noise output. The DC/DC converter also has built-in output overload, output short-circuit
and over-temperature protection and provides a 1500Vdc (input to output) isolation barrier.
© Silver Telecom 2014
Ag5200
V1.1 Sept 2014
Data Sheet
Power-over-Ethernet Plus Module
Table of Contents
1 2 Features ....................................................................................................................... 1 Description .................................................................................................................... 1 Table of Contents ............................................................................................................. 2 Table of Figures ............................................................................................................... 2 3 Ag5200 Product Selector† ............................................................................................ 3 4 Pin Description ............................................................................................................. 4 5 Functional Description .................................................................................................. 5 5.1 Inputs ..................................................................................................................... 5 5.2 PD Signature ......................................................................................................... 5 5.3 Isolation ................................................................................................................. 6 5.4 Power Classification .............................................................................................. 6 5.5 AT Detection .......................................................................................................... 7 5.6 DC/DC Converter .................................................................................................. 8 5.7 Output Adjustment ................................................................................................. 8 5.8 Typical Connections .............................................................................................. 9 5.9 Output Power....................................................................................................... 10 6 Typical Application ...................................................................................................... 10 7 Operating Temperature Range ................................................................................... 11 8 Protection ................................................................................................................... 12 9 EMC............................................................................................................................ 12 10 Electrical Characteristics ......................................................................................... 12 10.1 Absolute Maximum Ratings*................................................................................ 12 10.2 Recommended Operating Conditions.................................................................. 12 10.3 DC Electrical Characteristics* .............................................................................. 13 11 Package .................................................................................................................. 14 Table of Figures
Figure 1: Block Diagram ...................................................................................................... 3 Figure 2: Ag5200 DIL Package Format................................................................................ 4 Figure 3: Typical System Diagram ....................................................................................... 5 Figure 4: Position of the Isolation Barrier ............................................................................. 6 Figure 5: Two Event Physical Layer Detect Configuration ................................................... 7 Figure 6: Output Adjustment ................................................................................................ 8 Figure 7: Typical PoE Only Connection Diagram ................................................................. 9 Figure 8: Typical Application .............................................................................................. 10 Figure 9: Ag5200 Operating Profile ................................................................................... 11 © Silver Telecom 2014
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Ag5200
V1.1 Sept 2014
Data Sheet
Power-over-Ethernet Plus Module
3 Ag5200 Product Selector†
Part Number
Ag5200
Nominal Output Voltage
12V
Maximum Output Power *
30 Watts
Marking
12
Package
DIL
*At 25°C with VIN = 52V
† The Ag5200 fully meets the requirements of the RoHS directive 2002/95/EC on the restriction of hazardous substances in electronic
equipment.
Table 1: Ordering Information
~
-
+
~
POE
Inputs
Ag5200
~
-
+
+VDC
VIN+
~
VIN-
Signature
& Control
DC:DC
+
Converter
-VDC
ADJ
AT_DET
Figure 1: Block Diagram
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DC
Output
Ag5200
V1.1 Sept 2014
Data Sheet
Power-over-Ethernet Plus Module
4 Pin Description
Pin #
Name
1
VIN-
2
AT-DET
3
VIN+
4
VIN+
5
NC
No Connection. Do not connect to this pin.
6
VIN-
POE Direct Input -. This pin connects to the negative (-) output
of the POE input bridge rectifiers. This pin is internally connected
to pin 1.
-VDC
Negative DC Output. These pins are internally connected and
provide the negative regulated output from the Ag5200.
ADJ
Output Adjust. The output voltage can be adjusted from its
nominal value, by connecting an external resistor from this pin to
either the +VDC pin or the -VDC pin.
7
8
9
10
11
+VDC
Description
POE Direct Input -. This pin connects to the negative (-) output
of the POE input bridge rectifiers. This pin is internally connected
to pin 6.
AT Detect Output. This pin indicates if an IEEE802.3at PSE is
supplying power to the Ag5200; see Section 5.5 for more details.
POE Direct Input +. This pin connects to the positive (+) output
of the POE input bridge rectifiers. This pin is internally connected
to pin 4.
POE Direct Input +. This pin connects to the positive (+) output
of the POE input bridge rectifiers. This pin is internally connected
to pin 3.
Positive DC Output. These pins are internally connected and
provide the positive regulated output from the Ag5200.
Figure 2: Ag5200 DIL Package Format
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Ag5200
V1.1 Sept 2014
Data Sheet
Power-over-Ethernet Plus Module
5 Functional Description
5.1 Inputs
The Ag5200 has two input pins VIN+ and VIN-, these pins must be connected to two
external bridge rectifiers to ensure the inputs are polarity protected. This allows the
Ag5200 to be compatible with power sourcing equipment that uses the different power
options (power on the Data Pair or power on the Spare Pair); see Figure 3.
Figure 3: Typical System Diagram
5.2 PD Signature
When the Ag5200 is connected to the Cat 5e cable, it will automatically present a Powered
Device (PD) signature to the PSE, when requested. The PSE will recognise that a PD is
connected to that line and supply power.
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Ag5200
V1.1 Sept 2014
Data Sheet
Power-over-Ethernet Plus Module
5.3 Isolation
To meet the safety isolation requirements of IEEE802.3at section 33.4.1. A PD must pass
the electrical strength test of IEC 60950-1:2001 sub clause 6.2.1. This calls for either a)
1500Vac test or b) 2250Vdc test or c) 1500Vdc impulse test. The Ag5200 has been
designed to meet c) 1500Vdc impulse test (only).
1
6mm
6mm
Figure 4 shows the position of the isolation barrier on the bottom of the Ag5200.
Keep out area
11
6
7
Isolation Barrier
Figure 4: Position of the Isolation Barrier
5.4 Power Classification
The Ag5200 classification is fixed at Class 4, this means that an IEEE802.3at Type 1 or an
IEEE802.3af PSE will default to Class 0. However an IEEE802.3at PSE will recognise the
Class 4 as a Type 2 PD.
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Ag5200
V1.1 Sept 2014
Data Sheet
Power-over-Ethernet Plus Module
5.5 AT Detection
The Ag5200 has an AT-DET output pin which is used to detect a Two Event Physical
Layer classification as described in IEEE802.3at. If required the AT-DET pin can be
connected directly to an opto-coupler as shown in Figure 5.
Figure 5: Two Event Physical Layer Detect Configuration
If the Ag5200 detects a Two Event Physical Layer classification, the (AT True) switch will
close and Opto1 will turn ON. Opto1 will be connected across the isolation barrier and the
output collector can be connected to a controller (with a pull-up resistor connected to the
controller’s power rail). When Opto1 is ON the collector (output) will be Logic 0, the
controller will then know that the PSE is capable of delivering over 15.4W. To complete the
protocol the controller should then confirm that it is a Type 2 PD over the Data Link Layer*.
If the Ag5200 detects a Single Event Physical Layer classification, Opto1 will be OFF and
the output collector will be Logic 1 (via pull-up resistor). The controller should then assume
that the PSE is limited to delivering up to 15.4W.
If the PSE does not support the Physical Layer classification, Opto1 will be OFF.
The Ag5200 will operate with non IEEE802.3at compliant POE+ PSE’s.
*Note: There are several PSEs (including Cisco) that will only delivery ≤15.4W until they
receive Type 2 PD confirmation, over the Data Link Layer.
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Ag5200
V1.1 Sept 2014
Data Sheet
Power-over-Ethernet Plus Module
5.6 DC/DC Converter
The Ag5200’s DC/DC converter provides a regulated 12V (nominal) output with low ripple
and low noise. The DC/DC converter also has built-in output overload and short-circuit
protection. The Ag5200 also has thermal protection; which will shutdown the DC/DC
converter if exceeded.
5.7 Output Adjustment
The Ag5200 has an ADJ pin, which allows the output voltage to be increased or decreased
from its nominal value.
Figure 6 shows how the ADJ pin is connected: -
Ag5200
Ag5200
+VDC
+VDC
RA
ADJ
ADJ
RA
-VDC
-VDC
Reducing the output
voltage from nominal
Increasing the output
voltage from nominal
Figure 6: Output Adjustment
Reducing the output voltage, connect RA between ADJ and +VDC
Value of RA
Ag5200 output
Open Circuit
12.0V
100K Ohms
10.7V*
Increasing the output voltage, connect RA between ADJ and -VDC
Value of RA
Ag5200 output
Open Circuit
12.0V
0 Ohms
12.75V
Table 2: Output Adjustment Resistor (R) Value
*Note: It is important that the minimum output adjust is not taken below 10.7V. Setting the
output voltage below this level may result in the module being permanently damaged.
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Ag5200
V1.1 Sept 2014
Data Sheet
Power-over-Ethernet Plus Module
5.8 Typical Connections
The Ag5200 only requires a few external components - the bridge rectifiers on the VIN
input are to conform to the IEEE802.3at input polarity protection requirement. The 1000µF
capacitor (C1) connected across the output is needed for stability and to cope with load
step changes. This capacitor must be positioned as close to the output pins as possible. It
can be a low cost electrolytic capacitor (a minimum of 1000µF 16V is recommended) as
shown in Figure 7; it does not need to be a low ESR type for operation in temperatures
down to 0°C. But if ambient temperature is likely to go below 0°C then we would
recommend a low ESR electrolytic capacitor.
The output voltage can be adjusted by simply connecting a resistor between the ADJ pin
and either the +VDC Pin or the –VDC pin, see section 5.7 Output Adjustment.
Figure 7: Typical PoE Only Connection Diagram
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Ag5200
V1.1 Sept 2014
Data Sheet
Power-over-Ethernet Plus Module
5.9 Output Power
The Ag5200 is capable of delivering a maximum output power of 30W continuous;
however this is limited by the available input power and operating temperature.
When calculating the output power, the following factors must be taken into account: 1.
2.
3.
4.
5.
Ag5200 efficiency
PSE output power (which could be limited by the IEEE802.3at specification)
Cable and connector losses
Input bridge rectifier losses
Operating temperature
6 Typical Application
The Ag5200 can be used in numerous applications. In the example shown in Figure 8, 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 POE.
In this example port 1 is connected to an ethernet camera and port 2 is connected to a
door entry access unit, both of these devices have a built-in Ag5200. 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 Ag5200 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
Ag5200
Door Access
PC's and other non
PoE peripherals
Figure 8: Typical Application
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Ag5200
V1.1 Sept 2014
Data Sheet
Power-over-Ethernet Plus Module
7 Operating Temperature Range
Because the Ag5200 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 Ag5200 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 52Vdc input voltage supplied by the
PSE.
Because each application is different it is impossible to give fixed and absolute thermal
recommendations. However to obtain maximum power it is important that any enclosure
used has sufficient ventilation and forced airflow over the Ag5200.
When intended for used in ambient temperatures below 0°C we would recommend a low
ESR electrolytic capacitor be used on the DC output. Capacitors rated for -55°C operation
should be used below -20°C.
Figure 9 show the maximum ambient temperature under different load conditions. These
figures have been recorded in an Associated Environment System SD-302 chamber (with
circulating air). Operation in a sealed enclosure with limited airflow will result in de-rating of
the operating temperature profile.
Figure 9: Ag5200 Operating Profile
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Ag5200
V1.1 Sept 2014
Data Sheet
Power-over-Ethernet Plus Module
8 Protection
The Ag5200 has built-in over-current and thermal protection to prevent the module from
being damaged if operated beyond its power / temperature specification. If a short circuit is
applied to the output, the DC/DC converter will limit the current until the short circuit is
removed. If the maximum operating temperature is exceeded; the thermal protection circuit
will disable the DC/DC converter until the Ag5200 temperature has cooled sufficiently.
The Ag5200 may be damaged by input voltage transients greater than 80V. If protection
from electrostatic discharge (ESD) or other high voltage transients is required, it is
recommended that over-voltage clamping devices are fitted across the VIN and AUX
inputs. Typically an SMAJ58 will be sufficient; see Apps Note “ANX-POE-Protection”.
9 EMC
The Ag5200 has been designed to pass EN55022 Class b. However the module will only
be one component within a system. So it is impossible to say whether the final product will
pass EMC testing without the need for additional filtering. The Ag5200 uses a DC/DC
converter which runs at ~250KHz. Additional filtering information can be found in apps
note “ANX-POE-EMI”.
10 Electrical Characteristics
10.1 Absolute Maximum Ratings*
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
°
C
*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
1
POE Input Supply Voltage
2
POE Input Under Voltage Lockout
3
Operating Temperature †
30W Continuous
24W Continuous
14W Continuous
Min
Typ
Max
Units
VIN
36
48
57
V
VLOCK
30
36
V
50
70
85
Ta / °C
TOP
†See Section Operating Temperature Range
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Symbol
12
-40
25
Ag5200
V1.1 Sept 2014
Data Sheet
Power-over-Ethernet Plus Module
10.3 DC Electrical Characteristics*
DC Characteristic
Sym
Min
1
Input Voltage v Output Power
Output Power ≤ 18W
Output Power - 18W to 30W
VIN
36
50
2
Nominal Output Voltage
VOUT
11.5
Typ1
12
Max
Units
57
57
V
V
12.5
V
Line Regulation VIN = 36V to
57V @ max load
Load Regulation min to max
load (VIN = 50V)
Output Ripple and Noise Max
load2
VLINE
0.1
%
VLOAD
0.1
%
VRN
180
mVp-p
6
Minimum Load3
RLOAD
7
Short-Circuit Duration
TSC
8
Efficiency
EFF
9
Isolation Voltage (I/O)
VISO
3
4
5
200
Test
Comments
mA
∞
87
1500
sec
Continuous @
25 °C
%
@ 50% Load
VPK
Impulse Test
1: Typical figures are at 25°C with a nominal 52V 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: The minimum load can be reduced to 20mA. But if the load is less than 200mA, the module can emit an audible noise.
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Ag5200
V1.1 Sept 2014
Data Sheet
Power-over-Ethernet Plus Module
11 Package
50.60
2.44
45.72
1
11
6
7
0.60
(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.
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