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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 | Status | Product series | Pins | Application | PCB/Cable/Panel | Modularity | Wire Section | C | Tol. C | VR (V (DC)) | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | H (mm) | Fl (mm) | Packaging | IRP,40K (A) | ISAT,30% (A) | RDC typ. (mΩ) | fres (MHz) | VOP (V) | IR (A) | Working Voltage (V (AC)) | Z @ 100 MHz (Ω) | Zmax (Ω) | Test Condition Zmax | IR 2 (mA) | RDC max. (mΩ) | Type | Version | VIN | VOut1 (V) | IOut1 (A) | L (µH) | n | VT (V (RMS)) | Size | Vaux (V) | RDC 1 (Ω) | RDC 2 (Ω) | RDC 3 (Ω) | Mount | Data rate | Ports | PoE | Improved CMRR | Operating Temperature | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 744383430033 | SPEC | 10 files | Active i| Production is active. Expected lifetime: >10 years. | WE-MAPI SMT Power Inductor | 2 | – | – | – | – | – | – | – | – | – | – | 2 | 1.6 | 1 | – | – | 4.35 | 7.5 | 40 | 205 | 80 | 2.5 | – | – | – | – | – | 53 | – | SMT | – | – | – | 0.33 | – | – | 2010 | – | – | – | – | SMT | – | – | – | – | -40 °C up to +125 °C | ||
 | 74438356033 | SPEC | 10 files | Active i| Production is active. Expected lifetime: >10 years. | WE-MAPI SMT Power Inductor | 2 | – | – | – | – | – | – | – | – | – | – | 4 | 4 | 2 | – | – | 5.15 | 7.1 | 39.9 | 26 | 80 | 3.6 | – | – | – | – | – | 48 | – | SMT | – | – | – | 3.3 | – | – | 4020 | – | – | – | – | SMT | – | – | – | – | -40 °C up to +125 °C | ||
 | 691214110002 | SPEC | – | 6 files | Active i| Production is active. Expected lifetime: >10 years. | WR-TBL Series 2141 - 3.50 mm Horiz. Entry Modular | 2 | Rising Cage Clamp | PCB | Yes | 24 to 16 (AWG) 0.2 to 1 (mm²) | – | – | – | – | – | – | 7.05 | – | – | – | Box | – | – | – | – | – | 10 | 300 | – | – | – | – | – | Horizontal | – | – | – | – | – | – | – | – | – | – | – | – | THT | – | – | – | – | -40 °C up to +105 °C | |
 | 61300211121 | SPEC | – | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WR-PHD Pin Header - Single | 2 | – | – | – | – | – | – | – | – | 1000 MΩ | – | 5.08 | – | – | – | Bag | – | – | – | – | – | 3 | 250 | – | – | – | – | – | Straight | – | – | – | – | – | – | – | – | – | – | – | – | THT | – | – | – | – | -40 °C up to +105 °C | |
 | 7490220121 | SPEC | 10 files | Active i| Production is active. Expected lifetime: >10 years. | WE-LAN LAN Transformer | 24 | – | – | – | – | – | – | – | – | – | – | 17.55 | 16 | 7.2 | 13.97 | – | – | – | – | – | – | – | – | – | – | – | – | – | 4PPoE (to 600 mA) | SMT | – | – | – | 350 | 1:1 | 1500 | – | – | – | – | – | SMT | 10/100/1000BASE-T | 1 | 4PPoE (up to 600 mA) | No | -40 °C up to +105 °C | ||
 | 742792040 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | – | – | – | – | – | – | 2 | 1.2 | 0.0009 | 0.5 | – | – | – | – | – | – | 1.5 | – | 600 | 700 | 150 MHz | 2000 | 150 | High Current | SMT | – | – | – | – | – | – | 0805 | – | – | – | – | SMT | – | – | – | – | -55 °C up to +125 °C | ||
| 885012207103 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | 1 µF | ±10% | 50 | 10 | 0.1 GΩ | X7R Class II | 2 | 1.25 | 1.25 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 0805 | – | – | – | – | – | – | – | – | – | -55 °C up to +125 °C | |||
| 885012207128 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 100 V(DC) | – | – | – | – | – | 100 nF | ±10% | 100 | 2.5 | 1 GΩ | X7R Class II | 2 | 1.25 | 1.25 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 0805 | – | – | – | – | – | – | – | – | – | -55 °C up to +125 °C | |||
| 885012206114 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WCAP-CSGP MLCCs 100 V(DC) | – | – | – | – | – | 10 nF | ±10% | 100 | 2.5 | 10 GΩ | X7R Class II | 1.6 | 0.8 | 0.8 | 0.4 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 0603 | – | – | – | – | – | – | – | – | – | -55 °C up to +125 °C | |||
 | 750318587 | SPEC | – | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PoE+ Power over Ethernet Plus Transformer | – | – | – | – | – | – | – | – | – | – | – | 21.8 | 29.65 | 11.43 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | CCM Flyback | 17 - 57 V (DC) | 24 | 1 | 80 | 1:1:0.46 | 1500 | EFD20 | 10.6 | 0.125 | 0.1 | 0.165 | SMT | – | – | – | – | -40 °C up to +125 °C |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 744383430033 | SPEC | |
| 74438356033 | SPEC | |
| 691214110002 | SPEC | – |
| 61300211121 | SPEC | – |
| 7490220121 | SPEC | |
| 742792040 | SPEC | |
| 885012207103 | SPEC | ||
| 885012207128 | SPEC | ||
| 885012206114 | SPEC | ||
| 750318587 | SPEC | – |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | Pins | Application | PCB/Cable/Panel | Modularity | Wire Section | C | Tol. C | VR (V (DC)) | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | H (mm) | Fl (mm) | Packaging | IRP,40K (A) | ISAT,30% (A) | RDC typ. (mΩ) | fres (MHz) | VOP (V) | IR (A) | Working Voltage (V (AC)) | Z @ 100 MHz (Ω) | Zmax (Ω) | Test Condition Zmax | IR 2 (mA) | RDC max. (mΩ) | Type | Version | VIN | VOut1 (V) | IOut1 (A) | L (µH) | n | VT (V (RMS)) | Size | Vaux (V) | RDC 1 (Ω) | RDC 2 (Ω) | RDC 3 (Ω) | Mount | Data rate | Ports | PoE | Improved CMRR | Operating Temperature | Samples |
|---|
