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TPS2384 Datasheet

  • TPS2384

  • 四路以太網(wǎng)電源設(shè)備、電源管理器

  • 48頁(yè)

  • TI

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TPS2384
SLUS634A 鈭?NOVEMBER 2004 鈭?REVISED DECEMBER 2004
QUAD INTEGRATED POWER SOURCING EQUIPMENT POWER
MANAGER
FEATURES
D
Quad-Port Power Management With
D
D
D
D
D
D
D
D
D
D
D
D
D
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 Manual Operating Modes
Controlled Current Ramps for Reduced EMI
and Charging of PD鈥檚 Bulk Capacitance
I
2
C Clock and Oscillator Watch Dog Timers
Over-Temperature Protection
DC and DC Modulated Disconnect
Supports Legacy Detection for Non-Compliant
PD
Supports AC Disconnect
High-Speed 400-kHz I
2
C Interface
Comprehensive Power Management Software
Available
Operating Temperature Range 鈭?0擄C to 125擄C
RJ45
4
Switch/HUB
5
+48V
1
P
T
P
S
2
SCL 3
SDA鈭捍 8
SDA鈭扥 4
Ret
N
APPLICATIONS
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 (鈭?0擄C to +125擄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
Up to 100m RJ45
of CAT 5
4
Powered DTR
5
Spare Pair
1
Rx
VDD
Tx
2
Signal Pair
( )
2
Optional
MSP430
Micro鈭?/div>
Controller
3
Rx
6
Signal Pair
T
P
DET S
2
3
ILIM 7
CLASS5
VEE
PG
3
RTN
DC/DC
Converte
Tx
6
+48V
Return
3
3
6
Spare Pair
6
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.
www.ti.com
1

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