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Texas Instruments TPS23730 | Demoboard PMP23287
Class 6, PoE, PD, 24-V, 2.5-A active-clamp forward converter reference design
Overview
| Topology | LAN / POE |
| Input voltage | 42-57 V |
| Output 1 | 24 V / 2.5 A |
| IC revision | A |
Description
This reference design implements a Power over Ethernet (PoE) power device (PD) active clamp forward converter with 24-V and 2.5-A outputs. A TPS23730 PD with integrated pulse width modulator (PWM) controller provides all the necessary functions to implement the PoE PD and PWM control for the active clamp forward converter. This design uses secondary-side regulation (SSR) with an optocoupler feedback.
Features
- IEEE802.3bt Type 3 compliant PoE PD
- Integrated PWM controller for flyback or active clamp forward configuration
- Frequency dithering for EMI reduction
- Soft-start control with advanced startup and hiccup-mode overload protection
- Soft stop shutdown
- Optional adapter input
Typical applications
- Pass-through System, Video and VoIP Telephones, Access Points
- Redundant Power Feeds or Power Sharing
- Security Cameras
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) | Packaging | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC(mΩ) | fres(MHz) | Material | IR(mA) | ISAT(A) | LR(µH) | Version | VIN | VOut1(V (DC)) | IOut1(A) | Vaux(V) | n | Pins | Color | Gender | 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) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WL-SMCW SMT Mono-color Chip LED Waterclear, 590 nm, Yellow | Downloads27 files RAY files
| Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWL-SMCW SMT Mono-color Chip LED Waterclear | Dominant Wavelength [typ.]590 nm | Emitting ColorYellow | Peak Wavelength [typ.]595 nm | Luminous Intensity [typ.]120 mcd | Forward Voltage [typ.]2 V | Chip TechnologyAlInGaP | Viewing Angle Phi 0° [typ.]140 ° | – | – | Size0603 | – | – | – | Length1.6 mm | Width0.8 mm | Height0.7 mm | – | PackagingTape and Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +85 °C | – | MountSMT | – | – | |||
 | WE-CBF SMT EMI Suppression Ferrite Bead, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CBF SMT EMI Suppression Ferrite Bead | – | – | – | – | – | – | – | – | – | Size0603 | – | – | – | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.3 mm | – | – | – | – | – | – | – | Rated Current1500 mA | – | – | VersionSMT | – | – | – | – | – | – | – | – | Impedance @ 100 MHz300 Ω | Maximum Impedance450 Ω | Maximum Impedance250 MHz | Rated Current 22000 mA | DC Resistance0.15 Ω | TypeHigh Current | – | Number of windings1 | – | Rated Current2000 mA | DC Resistance [1]0.15 Ω | – | – | – | – | – | Operating Temperature -55 °C up to +125 °C | – | MountSMT | – | – | ||||
 | WE-SL5 SMT Common Mode Line Filter, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-SL5 SMT Common Mode Line Filter | – | – | – | – | – | – | – | – | – | – | – | – | – | Length10 mm | Width8.7 mm | Height6.5 mm | – | – | – | – | – | – | – | – | Rated Current2800 mA | – | – | VersionSMT | – | – | – | – | – | Pins4 | – | – | Impedance @ 100 MHz800 Ω | Maximum Impedance1200 Ω | Maximum Impedance20 MHz | – | DC Resistance0.035 Ω | – | Winding Stylesectional | Number of windings2 | Inductance [1]250 µH | Rated Current2000 mA | DC Resistance [1]0.035 Ω | Rated Voltage80 V | – | – | – | – | Operating Temperature -40 °C up to +125 °C | Insulation Test Voltage1000 V (AC) | MountSMT | Inductance250 µH | Leakage Inductance [min.]1500 nH | ||||
 | WE-HCI SMT Flat Wire High Current Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCI SMT Flat Wire High Current Inductor | – | – | – | – | – | – | – | – | – | Size1050 | – | – | – | Length10.5 mm | Width10.2 mm | Height4.7 mm | – | – | Performance Rated Current12 A | Saturation Current @ 10%4.5 A | Saturation Current @ 30%12 A | DC Resistance10.3 mΩ | Self Resonant Frequency30 MHz | MaterialSuperflux | – | – | Rated Inductance4.3 µH | VersionSMT | – | – | – | – | – | Pins2 | – | – | – | – | – | – | DC Resistance0.01133 Ω | – | – | Number of windings9.5 | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +150 °C | – | MountSMT | Inductance5.5 µH | – | ||||
| WE-HCI SMT Flat Wire High Current Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCI SMT Flat Wire High Current Inductor | – | – | – | – | – | – | – | – | – | Size1890 | – | – | – | Length18.3 mm | Width18.2 mm | Height8.9 mm | – | – | Performance Rated Current6.4 A | Saturation Current @ 10%6.25 A | Saturation Current @ 30%7 A | DC Resistance33.5 mΩ | Self Resonant Frequency7.5 MHz | MaterialMnZn | – | – | Rated Inductance40 µH | VersionSMT | – | – | – | – | – | Pins2 | – | – | – | – | – | – | DC Resistance36.18 Ω | – | – | Number of windings22.5 | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +125 °C | – | MountSMT | Inductance47 µH | – | ||||
 | WE-PD2 HV SMT Power Inductor (High Voltage), –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD2 HV SMT Power Inductor (High Voltage) | – | – | – | – | – | – | – | – | – | Size7850 | – | – | – | Length7 mm | Width7.8 mm | Height5 mm | – | – | – | – | – | – | Self Resonant Frequency1.6 MHz | – | Rated Current150 mA | Saturation Current0.2 A | – | – | – | – | – | – | – | – | – | – | – | – | – | – | DC Resistance7.2 Ω | – | – | – | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +125 °C | – | MountSMT | Inductance2200 µH | – | |||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | Capacitance330 pF | Capacitance±5% | Size0603 | Q-Factor1000 % | Insulation Resistance10 GΩ | Ceramic TypeNP0 Class I | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage50 V | – | – | – | – | Operating Temperature -55 °C up to +125 °C | – | – | – | – | |||||
 | WR-PHD Jumper, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Jumper | – | – | – | – | – | – | – | – | – | – | – | Insulation Resistance1000 MΩ | – | Length2.44 mm | – | – | – | PackagingBag | – | – | – | – | – | – | Rated Current3000 mA | – | – | – | – | – | – | – | – | Pins1 | ColorBlack | GenderJumper | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +125 °C | – | – | – | – | |||
 | WE-LAN LAN Transformer, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LAN LAN Transformer | – | – | – | – | – | – | – | – | – | – | – | – | – | Length17.55 mm | Width16 mm | Height98.8 mm | Pad Dimension13.97 mm | – | – | – | – | – | – | – | – | – | – | VersionSMT | – | – | – | – | Turns Ratio1:1 | Pins24 | – | – | – | – | – | – | – | Type4PPoE (to 900 mA) | – | – | Inductance [1]350 µH | – | – | – | Data rate10/100/1000BASE-T | Ports1 | PoE4PPoE (up to 1000 mA) | Improved Common Mode RejectionNo | Operating Temperature -40 °C up to +105 °C | Insulation Test Voltage1500 V (AC) | MountSMT | Inductance350 µH | – | ||||
 | WE-PoE++ Power over Ethernet Plus Plus Transformer, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PoE++ Power over Ethernet Plus Plus Transformer | – | – | – | – | – | – | – | – | – | SizeEFD20 | – | – | – | Length21.8 mm | Width29.65 mm | Height11.43 mm | – | – | – | – | – | – | – | – | – | Saturation Current1.8 A | – | VersionForward | Input Voltage 36 - 57 V (DC) | Output Voltage 124 V (DC) | Output Current 12.5 A | Auxiliary Voltage12 V | Turns Ratio2:2:1 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +125 °C | Insulation Test Voltage1500 V (AC) | MountSMT | Inductance100 µH | – |