PD69108/F

Copyright © 2013

Microsemi

Rev. 1.6

Analog Mixed Signal Group

1 Enterprise, Aliso Viejo, CA 92656, USA; Within the USA: (800) 713-4113, Outside the USA: (949) 221-7100 Fax: (949) 756-0308

15

TM

®

junction temperature exceeds 200° C. This mechanism

protects the device from extreme events, such as high

ambient temperature or other thermo-mechanical

failures that could damage the PD69108.

The PD69108 automatically disconnects port power in

cases where Vmain exceeds 60 VDC. This valuable

mechanism protects the load in cases where main

power source is faulty or damaged.

TY PIC A L A PPL IC A T IO N

This typical application illustrates a simple Power Over Ethernet system Solution for an 8 Ethernet Ports Switch or

Hub.

“POS” and “NEG” Signals should be connected to the Switch RJ45 Jack

To

Opto

MISO

SCK

xCS

MOSI

DRV_VAUX5

Addr0

Addr1

47nF

0.36?

Vport_Pos0

Vport_Neg0

Vport_Sense0

Vport_Neg7

Vport_Sense7

Vport_Neg7

Vmain

VAUX5

QGND

SPI Communication

Bus

x8

x8

Vport_Neg0

To

Power

Supply

PG0

PG1

PG2

Iref

Addr2

Addr3

PG3

MCU

MISO

SCK

xCS

MOSI

Isolated SPI

Communication

Bus

VAUX3P3

VAUX3P3_INT

Connected to DVDD or

DGND according to

desired address

QGND

QGND

30.1K?

Figure 3: Typical Application

* For detailed application's schematics and layout recommendations, contact: sales_AMSG@microsemi.com