PD69008 Datasheet, PDF (13/15 Pages) Microsemi Corporation – 8 Ports Power Over Ethernet Manager

PD69008 - 8 Ports Power Over Ethernet Manager
Configuration Pins _________________________________________
There are two main configuration pins utilized in the PD69008 (as shown in Figure 3) which configure the operation
mode of the chip and the communication addresses (SPI and I²C).
V M a in
VPeri 3.3v
Ex _Reg
ADC2P5
ASIC_INI
PD69008
I2C _IN I
QGND
Figure 3: Electronic Connection of Configuration Pins
Application information _______________________________________
The PD69008 can be integrated into a number of applications such as daughter boards, Ethernet switches or
routers. Examples of such applications are described below:
Integrated directly into a switch: Facilitates entire PoE concept by including the IC(s) on the main switch’s PCB.
Daughter board add-on: The IC is integrated into a small dedicated PoE PCB, mounted on top of the switch’s main
PCB or into a DIMM module.
Integrated into an RJ45 connector: Saves space on the main board and creates small differences between the PoE
and non-PoE versions of a switch.
Midspans: Stand-alone devices, installed between the Ethernet switch and the PDs (Powered Devices) such as
telephones, cameras, wireless LANs, etc.
These Midspans include the PD69008 IC as a PoE control element, destined to inject power over the
communication lines.
Figure 4 and Figure 5 provide examples of basic applications of the PD69008 in an AC Disconnect Mode and the
DC Disconnect Mode:
Copyright © 2009
Rev. 1.0, 2009-03-15
Microsemi
Analog Mixed Signal Group
Page 13
2381 Morse Avenue, Irvine, CA 92614, USA; Within the USA: [phone], Outside the USA: [phone] Fax: [phone]