TPS2384_13 Datasheet, PDF (1/51 Pages) Texas Instruments – QUAD INTEGRATED POWER SOURCING EQUIPMENT POWER MANAGER

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TPS2384
SLUS634D – NOVEMBER 2004 – REVISED MARCH 2007
QUAD INTEGRATED POWER SOURCING EQUIPMENT POWER MANAGER
FEATURES
• Quad-Port Power Management With Integrated
Switches and Sense Resistors
• Compliant to IEEE 802.3af Standard
• Operates from a Single 48-V Input Supply
• Individual Port 15-bit A/D
• Auto, Semi-Auto and Power Management
Operating Modes
• Controlled Current Ramps for Reduced EMI
and Charging of PD's Bulk Capacitance
• I²C Clock and Oscillator Watchdog Timers
• Over-Temperature Protection
• DC and DC Modulated Disconnect
• Supports Legacy Detection for Non-Compliant
PD's
• Supports AC Disconnect
• High-Speed 400-kHz I²C Interface
• Comprehensive Power Management Software
Available
• Operating Temperature Range –40°C to 125°C
APPLICATIONS
• Ethernet Enterprise Switches
• Ethernet Hubs
• SOHO Hubs
• Ethernet Mid-Spans
• 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 two external components per port (FET
and sense resistor) and will survive 100-V transients.
Four individual 15-bit A/D converters are used to
measure port resistance, voltage, current and die
temperature making PSE solutions simple and
robust. The TPS2384 comes with a comprehensive
software solution to meet the most demanding
applications which can serve as a core for all PoE
system designs.
TYPICAL APPLICATION
Up to 100 m
RJ45 _{of CAT 5} RJ45
PSE
+48 V
Spare Pair
Optional
MSP430
Micro-
Controller
TPS2384
SCL
SDA - I
SDA - O
+48 V
Return
Singnal Pair
Singnal Pair
Spare Pair
TPS2375
ILIM
CLASS
DC/DC
Converter
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.
PowerPAD is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2004–2007, Texas Instruments Incorporated