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Texas Instruments TPS23734 | Demoboard PMP23278
Class 4 PoE PD isolated-flyback converter (12 V, 2.1 A) primary side regulation reference design
Overview
| Topology | LAN / POE |
| Input voltage | 37-57 V |
| Output 1 | 12 V / 2.1 A |
Description
This reference design implements a Power over Ethernet (PoE) power device (PD) active clamp forward converter with 12-V and 2.1-A output. A TPS23734 PD, pulse width modulator (PWM) controller provides all the necessary functions to implement the PoE PD control and the PWM control for the active clamp forward converter. This design uses secondary side regulation (SSR) with an optocoupler feedback.
Features
- Combined PD and PWM controller
- Secondary side regulation using optocoupler
- Optional 48-V adapter input
- Frequency dithering for improved electromagnetic interference (EMI)
Typical applications
- Redundant Power Feeds or Power Sharing
- Security Cameras, Access Points, Video and VoIP Telephones
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Product series | λDom typ. (nm) | Emitting Color | λPeak typ. (nm) | IV typ. (mcd) | VF typ. (V) | Chip Technology | 2θ50% typ. (°) | C | Tol. C | Size | Q | RISO | Ceramic Type | L (mm) | W (mm) | H (mm) | Fl (mm) | ISAT (A) | fres (MHz) | Z @ 100 MHz (Ω) | Zmax (Ω) | Test Condition Zmax | IR 2 (mA) | RDC max. (Ω) | Type | Winding Style | Number of windings | L1 (µH) | IR (mA) | RDC max. (Ω) | VR (V) | Data rate | Ports | PoE | Improved CMRR | Operating Temperature | VT (V (AC)) | Mount | L (µH) | LSmin. (nH) | Pins (pcs) | Color | Gender | IR (mA) | Packaging | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 150060YS75000 | SPEC | 25 files RAY files
| WL-SMCW SMT Mono-color Chip LED Waterclear | 590 | Yellow | 595 | 120 | 2 | AlInGaP | 140 | – | – | 0603 | – | – | – | 1.6 | 0.8 | 0.7 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +85 °C | – | SMT | – | – | – | – | – | – | Tape and Reel | ||
 | 742792641 | SPEC | 9 files | WE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | – | – | – | – | 0603 | – | – | – | 1.6 | 0.8 | 0.8 | 0.3 | – | – | 300 | 450 | 250 MHz | 2000 | 0.15 | High Current | – | 1 | – | 2000 | 0.15 | – | – | – | – | – | -55 °C up to +125 °C | – | SMT | – | – | – | – | – | 1500 | – | ||
 | 744272251 | SPEC | 8 files | WE-SL5 SMT Common Mode Line Filter | – | – | – | – | – | – | – | – | – | – | – | – | – | 10 | 8.7 | 6.5 | – | – | – | – | 970 | – | – | 0.035 | – | sectional | 2 | 250 | 2000 | 0.035 | 80 | – | – | – | – | – | 1000 | SMT | 250 | 1500 | 4 | – | – | 2000 | – | ||
 | 768775322 | SPEC | – | 8 files | WE-PD2 HV SMT Power Inductor (High Voltage) | – | – | – | – | – | – | – | – | – | 7850 | – | – | – | 7 | 7.8 | 5 | – | 0.2 | 1.6 | – | – | – | – | 7.2 | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +125 °C | – | SMT | 2200 | – | – | – | – | 150 | – | |
 | 885012006060 | SPEC | 8 files | WCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | 330 pF | ±5% | 0603 | 1000 | 10 GΩ | NP0 Class I | 1.6 | 0.8 | 0.8 | 0.4 | – | – | – | – | – | – | – | – | – | – | – | – | – | 50 | – | – | – | – | -55 °C up to +125 °C | – | – | – | – | – | – | – | – | 7" Tape & Reel | ||
 | 60900213421 | SPEC | – | 3 files | WR-PHD 2.54 mm Multi-Jumper Jumper with Test Point | – | – | – | – | – | – | – | – | – | – | – | 1000 MΩ | – | 2.44 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +125 °C | – | – | – | – | 1 | Black | Jumper | 3000 | Bag | |
 | 7490220122 | 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 | – | – | – | – | – | – | – | – | – | – | – | – | – | 18.04 | 14.7 | 9.05 | 13.97 | – | – | – | – | – | – | – | 4PPoE (to 900 mA) | – | – | 350 | – | – | – | 1000BASE-T | 1 | 4PPoE (up to 1000 mA) | No | -40 °C up to +105 °C | 1500 | SMT | 350 | – | 24 | – | – | – | – |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 150060YS75000 | SPEC | |
| 742792641 | SPEC | |
| 744272251 | SPEC | |
| 768775322 | SPEC | – |
| 885012006060 | SPEC | |
| 60900213421 | SPEC | – |
| 7490220122 | 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. |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Product series | λDom typ. (nm) | Emitting Color | λPeak typ. (nm) | IV typ. (mcd) | VF typ. (V) | Chip Technology | 2θ50% typ. (°) | C | Tol. C | Size | Q | RISO | Ceramic Type | L (mm) | W (mm) | H (mm) | Fl (mm) | ISAT (A) | fres (MHz) | Z @ 100 MHz (Ω) | Zmax (Ω) | Test Condition Zmax | IR 2 (mA) | RDC max. (Ω) | Type | Winding Style | Number of windings | L1 (µH) | IR (mA) | RDC max. (Ω) | VR (V) | Data rate | Ports | PoE | Improved CMRR | Operating Temperature | VT (V (AC)) | Mount | L (µH) | LSmin. (nH) | Pins (pcs) | Color | Gender | IR (mA) | Packaging | Samples |
|---|