TPS2384

SLUS634A − NOVEMBER 2004 − REVISED DECEMBER 2004

QUAD INTEGRATED POWER SOURCING EQUIPMENT POWER

MANAGER

1

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FEATURES

Integrated Switches and Sense Resistors

and Charging of PD’s Bulk Capacitance

PD

Available

TYPICAL APPLICATION

APPLICATIONS

DESCRIPTION

The TPS2384 is a quad-port power sourcing equipment

power manager (PSEPM) and is compliant to the

Power-over-Ethernet (PoE) IEEE 802.3af standard.

The TPS2384 operates from a single 48-V supply and

over a wide temperature range (−40

°C to +125°C). The

integrated output eliminates 2 external components per

port (FET and sense resistor) and will survive 100-V

transient. Four individual 15-bit A/D converters are used

to measure port voltage, current and die temperature

making PSE solution simple and robust. The TPS2384

comes with a comprehensive software solution to meet

the most demanding application which can serve as a

core for all PoE system designs.

Rx

Tx

Rx

Tx

Signal Pair

Signal Pair

Spare Pair

Spare Pair

P

N

+48V

Return

Optional

MSP430

Micro−

Controller

Ret

SCL

SDA−I

SDA−O

VEE

ILIM

CLASS

DET

VDD

T

P

S

2

3

7

5

T

P

S

2

3

8

4

( )

DC/DC

Converte

PG

RTN

Up to 100m

of CAT 5

+48V

RJ45

RJ45

4

5

4

5

3

6

3

6

1

2

1

2

3

6

3

6

Switch/HUB

Powered DTR

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments

semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.