PD64012 Datasheet, PDF (13/16 Pages) List of Unclassifed Manufacturers – 12-channel PoE Manager

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.
+48VMain
VPeri
R1
R2
VPeri
Ex_Reg
ADC2P5
ASIC_INI
R3
I2C_INI
R4
To
Opto
Couplers
Reset
SDA
SCL
Disable_Ports
Vport_Pos
Vport_Neg
Vport_Sense
x12
Vport_Pos
Vport_Neg
Vport_Sense
Sense_Neg
MOSI
MISO
SCK
CS_0
CS_1
45.3k
2R
100n
Vport_Pos_1
Vport_Neg_1
x12
Vport_Pos_12
Vport_Neg_12
SPI
Communication
Bus
Figure 7 - Single-port Application with AC Disconnect Support
VMain
1u
100n
3.3V (VPeri)
4.7u 100n
100n
Vmain
Ref_Port_Neg
CP_In
CP_Out
47n
IRef
Ex_Reg
Vperi
2.5V
Vcc2P5
ADC2P5
100n
100n
24.9K
Figure 8 - Typical Power Filtering
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13
06-0003-058 (Rev. 2.8) / 5 August 2004
© PowerDsine 2003
Information in this document subject
to change without prior notice.