TPS2384 Datasheet, PDF (1/46 Pages) Texas Instruments – QUAD INTEGRATED POWER SOURCING EQUIPMENT POWER MANAGER

TPS2384
SLUS634A − NOVEMBER 2004 − REVISED DECEMBER 2004
QUAD INTEGRATED POWER SOURCING EQUIPMENT POWER
MANAGER
FEATURES
APPLICATIONS
D Quad-Port Power Management With
Integrated Switches and Sense Resistors
D Compliant to IEEE 802.3af Standard
D Operates from a Single 48-V Input Supply
D Individual Port 15-bit A/D
D Auto, Semi-Auto and Manual Operating Modes
D Controlled Current Ramps for Reduced EMI
and Charging of PD’s Bulk Capacitance
D I²C Clock and Oscillator Watch Dog Timers
D Over-Temperature Protection
D DC and DC Modulated Disconnect
D Supports Legacy Detection for Non-Compliant
PD
D Supports AC Disconnect
D High-Speed 400-kHz I²C Interface
D Comprehensive Power Management Software
Available
D Operating Temperature Range −40°C to 125°C
D Ethernet Enterprise Switches
D Ethernet Hubs
D SOHO Hubs
D Ethernet Mid-Spans
D PSE Injectors
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.
TYPICAL APPLICATION
RJ45 Up to 100m RJ45
of CAT 5
4
4
+48V
Switch/HUB
5
5
Spare Pair
Powered DTR
P
Tx
Optional
MSP430
Micro−
Controller
T
P
S
2 ()
SCL ³
SDA−I ⁸
SDA−O ⁴
Ret N
Rx
+48V
Return
1
1
2
2
Signal Pair
3
3
6
6
Signal Pair
3
3
Rx
Tx
VDD
T
P
DET S PG
2
ILIM
3
7
CLASS5
VEE ^RTN
DC/DC
Converte
6
6
Spare Pair
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.
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