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Texas Instruments TPS23754 | Demoboard PMP22301
IEEE 802.3at, high efficiency, PoE interface and DC/DC controller
Overview
| Topology | Other Topology |
| Input voltage | 24-48 V |
| Output 1 | 24 V / 0.9 A |
| IC revision | B |
Description
The TPS23754 and TPS23756 devices have a combined power-over-ethernet (PoE), powered-device (PD) interface, and current-mode DC-DC controller optimized specifically for isolated converters. The PoE interface supports the IEEE 802.3at standard.The TPS23754 and TPS23756 support a number of input voltage ORing options including highest voltage, external adapter preference, and PoE preference. These features allow the designer to determine which power source will carry the load under all conditions.The PoE interface features the new extended hardware classification necessary for compatibility with high-power midspan power sourcing equipment (PSE) per IEEE 802.3at. The detection signature pin can also be used to force power from the PoE source off. Classification can be programmed to any of the defined types with a single resistor.The DC-DC controller features two complementary gate drivers with programmable dead time. This simplifies the design of active-clamp forward converters or optimized gate drive for highly-efficient flyback topologies. The second gate driver may be disabled if desired for single MOSFET topologies. The controller also features internal soft start, bootstrap start-up source, current-mode compensation, and a 78% maximum duty cycle. A programmable and synchronizable oscillator allows design optimization for efficiency and eases use of the controller to upgrade existing power supply designs. Accurate programmable blanking, with a default period, simplifies the usual current-sense filter design trade-offs.The TPS23754 device has a 15-V converter start-up while the TPS23756 device has a 9-V converter start-up. The TPS23754-1 replaces the PPD pin with a no-connect for increased pin spacing.
Features
- Powers up to 30-W (Input) PDs
- DC-DC Control Optimized for Isolated Converters
- Supports High-Efficiency Topologies
- Complete PoE Interface
- Enhanced Classification per IEEE 802.3at With Status Flag
- Adapter ORing Support
- Programmable Frequency With Synchronization
- Robust 100-V, 0.5-Ω Hotswap MOSFET
- –40°C to 125°C Junction Temperature Range
- Industry Standard PowerPAD™ HTSSOP-20
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Product series | Application | PCB/Cable/Panel | Modularity | Wire Section | C | Tol. C | VR (V (DC)) | Size | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | Fl (mm) | IRP,40K (A) | ISAT,30% (A) | RDC typ. (mΩ) | fres (MHz) | V (V) | Z @ 100 MHz (Ω) | Zmax (Ω) | Test Condition Zmax | IR 2 (mA) | RDC max. (Ω) | Type | Data rate | Ports | PoE | Improved CMRR | Operating Temperature | VT (V (RMS)) | Mount | L (µH) | Pins (pcs) | Rows | H (mm) | Gender | IR (A) | Packaging | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 691214110002 | SPEC | – | 6 files | WR-TBL Series 2141 - 3.50 mm Horiz. Entry Modular | Rising Cage Clamp | PCB | Yes | 24 to 16 (AWG) 0.2 to 1 (mm²) | – | – | – | – | – | – | – | 7.05 | – | – | – | – | – | – | – | – | – | – | – | – | Horizontal | – | – | – | – | -40 °C up to +105 °C | – | THT | – | 2 | – | – | – | 10 | Box | |
 | 742792040 | SPEC | 9 files | WE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | – | – | 0805 | – | – | – | 2 | 1.2 | 0.5 | – | – | – | – | – | 600 | 700 | 150 MHz | 2000 | 0.15 | High Current | – | – | – | – | -55 °C up to +125 °C | – | SMT | – | – | – | 0.9 | – | 1.5 | – | ||
 | 744383430033 | SPEC | 9 files | WE-MAPI SMT Power Inductor | – | – | – | – | – | – | – | 2010 | – | – | – | 2 | 1.6 | – | 4.35 | 7.5 | 40 | 205 | 80 | – | – | – | – | 0.053 | – | – | – | – | – | -40 °C up to +125 °C | – | SMT | 0.33 | 2 | – | 1 | – | 2.5 | – | ||
 | 74438356033 | SPEC | 9 files | WE-MAPI SMT Power Inductor | – | – | – | – | – | – | – | 4020 | – | – | – | 4 | 4 | – | 5.15 | 7.1 | 39.9 | 26 | 80 | – | – | – | – | 0.048 | – | – | – | – | – | -40 °C up to +125 °C | – | SMT | 3.3 | 2 | – | 2 | – | 3.6 | – | ||
 | 885012207103 | SPEC | 8 files | WCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | 1 µF | ±10% | 50 | 0805 | 10 | 0.1 GΩ | X7R Class II | 2 | 1.25 | 0.5 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -55 °C up to +125 °C | – | – | – | – | – | 1.25 | – | – | 7" Tape & Reel | ||
 | 61300211121 | SPEC | – | 6 files | WR-PHD 2.54 mm THT Pin Header | – | – | – | – | – | – | – | – | – | 1000 MΩ | – | 5.08 | – | – | – | – | – | – | – | – | – | – | – | – | Straight | – | – | – | – | -40 °C up to +105 °C | – | THT | – | 2 | Single | – | Pin Header | 3 | Bag | |
 | 7490220121 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | 8 files | WE-LAN LAN Transformer | – | – | – | – | – | – | – | – | – | – | – | 18.29 | 16 | 13.97 | – | – | – | – | – | – | – | – | – | – | 4PPoE (to 600 mA) | 1000BASE-T | 1 | 4PPoE (up to 600 mA) | No | -40 °C up to +105 °C | 1500 | SMT | 350 | 24 | – | 7.45 | – | – | – | ||
| 885012207128 | SPEC | 6 files | WCAP-CSGP MLCCs 100 V(DC) | – | – | – | – | 100 nF | ±10% | 100 | 0805 | 2.5 | 1 GΩ | X7R Class II | 2 | 1.25 | 0.5 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -55 °C up to +125 °C | – | – | – | – | – | 1.25 | – | – | 7" Tape & Reel | ||
| 885012206114 | SPEC | 6 files | WCAP-CSGP MLCCs 100 V(DC) | – | – | – | – | 10 nF | ±10% | 100 | 0603 | 2.5 | 10 GΩ | X7R Class II | 1.6 | 0.8 | 0.4 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -55 °C up to +125 °C | – | – | – | – | – | 0.8 | – | – | 7" Tape & Reel | ||
| 750318587 | SPEC | – | – | Flyback Transformer | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 691214110002 | SPEC | – |
| 742792040 | SPEC | |
| 744383430033 | SPEC | |
| 74438356033 | SPEC | |
| 885012207103 | SPEC | |
| 61300211121 | SPEC | – |
| 7490220121 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | |
| 885012207128 | SPEC | |
| 885012206114 | SPEC | |
| 750318587 | SPEC | – |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Product series | Application | PCB/Cable/Panel | Modularity | Wire Section | C | Tol. C | VR (V (DC)) | Size | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | Fl (mm) | IRP,40K (A) | ISAT,30% (A) | RDC typ. (mΩ) | fres (MHz) | V (V) | Z @ 100 MHz (Ω) | Zmax (Ω) | Test Condition Zmax | IR 2 (mA) | RDC max. (Ω) | Type | Data rate | Ports | PoE | Improved CMRR | Operating Temperature | VT (V (RMS)) | Mount | L (µH) | Pins (pcs) | Rows | H (mm) | Gender | IR (A) | Packaging | Samples |
|---|