Silver Ag9000-S

Silver

T E L E C O M

V2.5 March 2007

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 2007

V2.5 March 2007

Data Sheet

Ag9000-S

Power-Over-Ethernet Module

Table of Contents

1. Features...........................................................................................................................1

2. Description.......................................................................................................................1

Table of Contents.............................................................................................................2

Table of Figures ...............................................................................................................2

3. Ag9000-S Product Selector .............................................................................................2

4. Pin Description.................................................................................................................4

5. Functional Description .....................................................................................................5

5.1. Inputs ........................................................................................................................5

5.2. PD Signature.............................................................................................................5

5.3. Isolation.....................................................................................................................5

5.4. Power Classification ..................................................................................................6

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. Electrical Characteristics................................................................................................13

9.1. Absolute Maximum Ratings* ...................................................................................13

9.2. Recommended Operating Conditions .....................................................................13

9.3. DC Electrical Characteristics* .................................................................................13

10. Package.......................................................................................................................14

10.1. Ag9000-S ..............................................................................................................14

Table of Figures

Figure 1: Block Diagram ......................................................................................................3

Figure 2: Ag9000-S Package Format ..................................................................................3

Figure 3: Typical System Diagram.......................................................................................5

Figure 4: Class Programming Option...................................................................................6

Figure 5: Output Adjustment ................................................................................................7

Figure 6: Typical Connection Diagram.................................................................................8

Figure 7: Typical Application................................................................................................9

Figure 8: Typical Layout.....................................................................................................10

Figure 9: Power Plane Heatsink for Ag9000-S ..................................................................11

Figure 10: Ag9033-S Operating Profile ..............................................................................11

Figure 11: Ag9050-S Operating Profile ..............................................................................12

Figure 12: Ag9120-S Operating Profile ..............................................................................12

3. Ag9000-S Product Selector

Part Number

Nominal Output Voltage Maximum Output Power *

Ag9120-S 12.0V

Ag9050-S 5.0V

Marking

9 5

Ag9033-S 3.3V

*At 25°C with V

IN

= 48V

† All versions of the Ag9000 are RoHS compliant.

6 3

Table 1: Ordering Information

© Silver Telecom 2007 2

V2.5 March 2007

Data Sheet

VA1

Input

VA2

VB1

Input

VB2

Ag9000-S

Signature

& Control

DC:DC

Converter

Figure 1: Block Diagram

Ag9000-S

Power-Over-Ethernet Module

DC

Output

1

© Silver Telecom 2007

Figure 2: Ag9000-S Package Format

3

V2.5 March 2007

Data Sheet

Ag9000-S

Power-Over-Ethernet Module

4. Pin Description

Pin # Name Description

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.

Class Programming (1).

Connect an external resistor to CP2 will change the current class of the module. With no resistor fitted the

Ag9000 will default to Class 0.

Class Programming (2).

Connect an external resistor to CP1 will change the current class of the module. With no resistor fitted the

Ag9000 will default to Class 0.

7 GND The ground return for the +VDC 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 GND pin.

10 IC Do not connect to this pin.

© Silver Telecom 2007 4

V2.5 March 2007

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)

POWERED DEVICE

(PD)

4 4

+

5 5

+/-

1 1

* *

VA1 VB1

TX RX

2 2

DC

OUTPUT

PSE

(48V)

Ag9000-S

3 3

RX TX

6 6

VA2 VB2

* *

+/-

7 7

-

8 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 2007 5

V2.5 March 2007

Data Sheet

Ag9000-S

Power-Over-Ethernet Module

5.4. Power Classification

This is optional from the PSE and is used for power management. The Ag9000-S allows the current class to be externally programmed by connecting a resistor between the CP1

and CP2 pins, see Figure 4: Class Programming Option. If no resistor is fitted the Ag9000-

S will default to Class 0, a full list of programming resistor values are shown in Table 2:

Class Programming.

CLASS

0

Programming

Resistance (Ohms)

Do not fit

Min Power

(W)

0.44

Max Power

(W)

12.95

Table 2: Class Programming

Ag9000-S

CP1

R

CP2

Class Programming option

Figure 4: Class Programming Option

© Silver Telecom 2007 6

V2.5 March 2007

Data Sheet

Ag9000-S

Power-Over-Ethernet Module

5.5. DC/DC Converter

The Ag9000-S’s DC/DC converter provides a regulated low ripple and low noise output,

that has built-in overload and short-circuit output protection - see Table 1: Ordering

Information for voltage and power ratings.

5.6. Output Adjustment

The Ag9000-S has an ADJ pin, which allows the output voltage to be increased or decreased from its nominal value.

Figure 5: Output Adjustment shows how the ADJ pin is connected: -

Ag9000-S

+VDC

ADJ

GND

R

Ag9000-S

+VDC

ADJ

GND

R

Reducing the output voltage from nominal

Increasing the output voltage from nominal

Figure 5: Output Adjustment

Reducing the output voltage, connect R between ADJ and +VDC

Value of R Ag9033-S output Ag9050-S output Ag9120-S output

Open Circuit

100k Ohms

3.30V

3.25V

5.00V

4.75V

12.00V

10.00V

0 Ohms 3.10V 4.50V 9.00V

Increasing the output voltage, connect R between ADJ and GND

Value of R Ag9033-S output Ag9050-S output Ag9120-S output

Open Circuit

100k Ohms

0 Ohms

3.30V

3.40V

4.70V

5.00V

5.25V

5.50V

12.00V

12.75V

13.15V

Table 3: Output Adjustment Resistor (R) Value

© Silver Telecom 2007 7

V2.5 March 2007

Data Sheet

Ag9000-S

Power-Over-Ethernet Module

5.7. Typical Connections

The Ag9000-S only requires one external component as shown in Figure 6: Typical

Connection Diagram, a minimum of 470µF is recommended.

The value of C1 will be 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 a 1.8 Amp load step change, a minimum of 1000µF should be used. This can be a standard low cost electrolytic and does not need to be a low ESR type.

Figure 6 shows a 16V capacitor that would cover all product variants up to and including

the Ag9120-S, see Table 1: Ordering Information.

The Class programming and the Output Adjust inputs are optional and are provided to give great flexibility to the Ag9000-S product range. Further information on using these inputs

can be found in sections 5.4. Power Classification and 5.6. Output Adjustment.

RJ-45

4

5

7

VB1

Ag9000-S

ADJ

VB2

8

VA1

1 +VDC

RX

2

+

C1

Output

470µF 16V

VA2

3 GND

TX

6

CP1

CP2

Figure 6: Typical Connection Diagram

© Silver Telecom 2007 8

V2.5 March 2007

Data Sheet

Ag9000-S

Power-Over-Ethernet Module

6. Typical Application

The Ag9000-S can be used in numerous applications. In the example shown in Figure 7:

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 Ag9000-S. 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 Ag9000-S 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

8

1

Switch

Patch Cables

1 Midspan Equipment

Ethernet

Camera

Ag9000-S

Wireless

Access Point

PC's and other non

PoE peripherals

Figure 7: Typical Application

© Silver Telecom 2007 9

V2.5 March 2007

Data Sheet

Ag9000-S

Power-Over-Ethernet Module

7. Typical Recommendations

Figure 8: Typical Layout gives an example of the tracking needed for the Ag9000-S. R1,

R2 and R3 are optional components, but C1 needs to be positioned close to the output pins of the Ag9000-S as possible to minimise the current loop. The thermal performance of the Ag9000-S can be improved by increasing the surface area of the output tracks (+VDC and GND) this is not applicable if the Ag9000-S is in a socket.

CLASS

R1

+

ADJ

R2 R3

_

1

Ag9000-S

VA & VB

Inputs

* *

C1

Output

Voltage

* Heat dissipation of the Ag9000C-S can be improved by increasing the surface area of the +VDC and GND output tracks.

Figure 8: Typical Layout

8. Operating Temperature Range

Because the Ag9000-S 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 Ag9000-S 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 Ag9000-S 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 Ag9000-S can be improved by forcing the airflow over the part or by using a heatsink (see the Ag9000-S application note on heatsinking for more information).

The output stage of the Ag9000-S has a built-in thermal protection circuit, to prevent the module from being damaged if operated beyond its power / temperature specification.

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 Ag9000-S and a direct airflow if possible.

© Silver Telecom 2007 10

V2.5 March 2007

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

Ag9000-S

C1

VA & VB

Inputs

R1

CLASS

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).

4

3

2

1

6

5

-20 -10 0 10 20 30 40

Ambient Temperaure (°C)

50 60 70

© Silver Telecom 2007

Figure 10: Ag9033-S Operating Profile

11

V2.5 March 2007

Data Sheet

Ag9000-S

Power-Over-Ethernet Module

9

8

7

6

3

2

5

4

1

-20 -10 0 10 20 30 40

Ambient Temperaure (°C)

50 60

Figure 11: Ag9050-S Operating Profile

70

12

11

10

9

8

7

6

5

4

3

2

1

-20 -10 0 10 20 30 40

Ambient Temperaure (°C)

50 60 70

© Silver Telecom 2007

Figure 12: Ag9120-S Operating Profile

12

V2.5 March 2007

Data Sheet

Ag9000-S

Power-Over-Ethernet Module

9. Electrical Characteristics

9.1. Absolute Maximum Ratings

1

1 DC Supply Voltage V

CC

-0.3 60 V

2 DC Supply Voltage Surge for 1ms V

SURGE

-0.6 80 V

T

S

-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.

9.2. Recommended Operating Conditions

1 Input Supply Voltage

1

2 Under Voltage Lockout V

LOCK

Temperature

2

T

OP

Note 1: With minimum load

2: See Section 8. Operating Temperature Range

9.3. DC Electrical Characteristics

DC Characteristic Sym Min Typ

1

1 Nominal Output Voltage

2 Output Current (V

IN

= 48V)

+VDC

PWR

V

LINE

V

IN

3.3

5

12

0.1

36 48 60 V

30 36 V

Max Units

1.8

1.8

1

V

V

V

A

A

A

Test

Comments

Ag9033-S

Ag9050-S

Ag9120-S

Ag9033-S

Ag9050-S

Ag9120-S

% @ 50% Load

5 Output Ripple and Noise

8 Efficiency

Duration

9 Isolation Voltage (I/O)

4

V

LOAD

R

V

LOAD

T

RN

SC

EFF

V

ISO

100

100

75 mVp-p @ Max load

2 mA for specified regulation

3

∞ sec

1500 V

%

DC

Ag9050-S @

50% Load

TC 0.02 % Per C

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: Can be used with no load at reduced voltage regulation.

4: 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 2007 13

V2.5 March 2007

Data Sheet

10. Package

10.1. Ag9000-S

18.0 (max)

Ag9000-S

Power-Over-Ethernet Module

56.0

Ag9000-S

1

3.0

0.6 ± 0.05

7.0 (max)

1.8 ± 0.25

2.54 ± 0.05

30.48 ± 0.25

(Recommended PCB hole diameter = 1.1 ± 0.05)

Dimensions (in mm) are nominal unless otherwise stated

0.6 ± 0.05

© Silver Telecom 2007 14

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