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 • • 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 • • • • • 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 • • • • • • • • 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. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. 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