PD64012

12-CHANNEL PoE MANAGER

Applications

The PD64012 may be integrated into a number of applications, ranging from daughter boards to full integration into

Ethernet switches. Examples of such applications are:

Integrated directly in a switch – facilitates the entire PoE concept, by including the ASIC(s) on the main switch PCB.

Daughter board add-on – in which the ASIC is integrated into a small PCB for PoE, mounted on top of the switch’s

main PCB.

Midspan units – stand alone devices, installed between the Ethernet switch and powered devices (telephone,

camera, wireless LAN, etc..). These Midspan units include the PD64012 ASIC as a PoE control element, to inject

power over the communication lines.

Figures 7 thru 10 provide detailed schematic diagrams for various applications of the PD64012.

To

Opto

Couplers

VPeri

MISO

SCK

CS_0

CS_1

MOSI

Ex_Reg

Reset

SDA

SCL

Disable_Ports

100n

45.3k

2R

Vport_Pos_1

Vport_Neg_1

Vport_Pos

Vport_Neg

Vport_Sense

Vport_Pos

Vport_Neg

Vport_Sense

Vport_Pos_12

Vport_Neg_12

x12

x12

+48VMain

VPeri

Sense_Neg

SPI

Communication

Bus

R1

R2

R3

R4

ASIC_INI

I2C_INI

ADC2P5

Figure 7 - Single-port Application with AC Disconnect Support

Vmain

Ex_Reg

Ref_Port_Neg

Vperi

100n

Vcc2P5

ADC2P5

IRef

VMain

3.3V (VPeri)

4.7u

100n

100n

100n

1u

47n

100n

CP_In

CP_Out

24.9K

2.5V

Figure 8 - Typical Power Filtering

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© PowerDsine 2003

Information in this document subject

06-0003-058 (Rev. 2.8) / 5 August 2004

to change without prior notice.

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