TI TPS23751PWPR

TPS23751
TPS23752
www.ti.com
SLVSB97 – JULY 2012
IEEE 802.3at PoE Interface with Wide Range High Efficiency DC/DC Controller
Check for Samples: TPS23751 , TPS23752
FEATURES
DESCRIPTION
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The TPS23751 is a 16-pin integrated circuit that
combines a Power-over-Ethernet (PoE) powered
device (PD) interface and a current-mode DC/DC
controller optimized specifically for applications
requiring high efficiency over a wide load range.
1
IEEE 802.3at Classification with Status Flag
High Efficiency Solutions Over Wide Load
Range
Powers up to 25.5 W PDs
Robust 100 V, 0.5 Ω Hotswap MOSFET
Synchronous Rectifier Disable Signal
PowerPad™ TSSOP Packages
Complete PoE Interface Plus DC/DC Controller
Adapter ORing Support
Programmable Frequency
TPS23752 Supports Ultra-Low Power Sleep
Modes
–40°C to 125°C Junction Temperature Range
APPLICATIONS
The TPS23752 is a 20-pin extended version of the
TPS23751 with the addition of a sleep mode feature.
Sleep mode disables the converter to minimize power
consumption while still generating the Maintain Power
Signature (MPS) required by IEEE802.3at.
IEEE 802.3at-Compliant Devices
Video and VoIP Telephones
Multiband Access Points
Security Cameras
Pico-Base Stations
From Ethernet
Pairs 1,2
VDD
DOUT
R T2P
R SRD
R SRT1
M2
OPTO2
ROB
RSRT2
OPTO1
6/25/12
Type 2 PSE
Indicator
M1
VOUT
C VC
ARTN
OPTO1
SRT
GATE
CS
SRD
OPTO3
D VC1
RVC
VC
VB
C VB
RT
CCTL
R CTL
R APD2
Adapter
R APD1
T2P
TPS23751
58V
R CLS
0.1uF
From Ethernet
Pairs 3,4
CLS
PAD
VSS
APD
CTL
RT
VB
DA
CIN
OPTO3
DEN
VOUT
C IO
OPTO2
C IZ
TLV 431
R FBU
R DEN
T1
RTN
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Figure 1. Typical Application Circuit
1
2
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.
PRODUCT PREVIEW information concerns products in the
formative or design phase of development. Characteristic data and
other specifications are design goals. Texas Instruments reserves
the right to change or discontinue these products without notice.
Copyright © 2012, Texas Instruments Incorporated
PRODUCT PREVIEW
The DC/DC controller features internal soft-start, a
bootstrap startup current source, current-mode
control with slope compensation, blanking, and
current limiting. Efficiency is enhanced at light loads
by disabling synchronous rectification and entering
variable frequency operation (VFO).
R FBL
•
The PoE interface implements type-2 hardware
classification per IEEE 802.3at. It also includes an
auxiliary power detect (APD) input and a disable
function (DEN). A 0.5 Ω, 100 V pass MOSFET
minimizes heat dissipation and maximizes power
utilization.
C OUT
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RCS
2
PACKAGE OPTION ADDENDUM
www.ti.com
16-Aug-2012
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package
Drawing
Pins
Package Qty
Eco Plan
(2)
Lead/
Ball Finish
MSL Peak Temp
(3)
TPS23751PWP
PREVIEW
HTSSOP
PWP
16
70
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
TPS23751PWPR
PREVIEW
HTSSOP
PWP
16
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
TPS23752PWP
PREVIEW
HTSSOP
PWP
20
70
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
TPS23752PWPR
PREVIEW
HTSSOP
PWP
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
Samples
(Requires Login)
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
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In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 1
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