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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 | Status | 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 (Value) (pcs) | Color | Gender | IR (mA) | Packaging | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 150060YS75000 | SPEC | 25 files RAY files
| Active i| Production is active. Expected lifetime: >10 years. | 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 | Active i| Production is active. Expected lifetime: >10 years. | 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 | Active i| Production is active. Expected lifetime: >10 years. | 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 | Active i| Production is active. Expected lifetime: >10 years. | 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 | Active i| Production is active. Expected lifetime: >10 years. | 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 | Active i| Production is active. Expected lifetime: >10 years. | 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 | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WE-LAN LAN Transformer | – | – | – | – | – | – | – | – | – | – | – | – | – | 17.55 | 16 | 98.8 | 13.97 | – | – | – | – | – | – | – | 4PPoE (to 900 mA) | – | – | 350 | – | – | – | 10/100/1000BASE-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 |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Status | 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 (Value) (pcs) | Color | Gender | IR (mA) | Packaging | Samples |
|---|