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Texas Instruments UCC2897A | Demoboard PMP21318
Class 8 PoE 12-V, 6-A, powered device (PD) active-clamp forward converter reference design
Overview
| Topology | Forward Converter |
| Input voltage | 18-110 V |
| Output 1 | 12 V / 6 A |
| IC revision | C |
Description
This reference design features a Type-4, Class 8, 71-W active clamp forward converter for powered devices (PD) through Power over Ethernet (PoE). The TPS2373-4 PD controller provides detection and classification and also powers up the UCC2897A pulse-width modulation (PWM) controller through its advanced start-up feature.
Features
- Supports power levels for IEEE802.3bt Type-4
- Automatic maintain power signature (MPS)
- Advanced start-up
- Synchronous rectifiers for high efficiency
Typical applications
- High-efficiency DC-to-DC power supplies
- Server power, 48-V telecom, datacom, and 42-V automotive applications
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 | VR(V (DC)) | Size | Operating Temperature | DF(%) | RISO | Ceramic Type | L(mm) | W(mm) | H(mm) | Fl(mm) | Packaging | L(µH) | IR(A) | ISAT(A) | RDC(mΩ) | fres(MHz) | VT(V (DC)) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | Material | Version | VIN | VOut1(V) | IOut1(A) | Vaux(V) | n | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WL-SMCW SMT Mono-color Chip LED Waterclear, 590 nm, Yellow | Downloads26 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 | Operating Temperature -40 °C up to +85 °C | – | – | – | Length1.6 mm | Width0.8 mm | Height0.7 mm | – | PackagingTape and Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | MountSMT | |||
 | 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 | – | – | – | – | – | – | – | – | – | – | Size7050 | Operating Temperature -40 °C up to +150 °C | – | – | – | Length7 mm | Width6.9 mm | Height4.8 mm | – | – | Inductance4.9 µH | – | – | DC Resistance14.5 mΩ | Self Resonant Frequency56 MHz | – | Performance Rated Current8.3 A | Saturation Current @ 10%2.2 A | Saturation Current @ 30%6.5 A | MaterialSuperflux | VersionSMT | – | – | – | – | – | MountSMT | ||||
| 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 | – | – | – | – | – | – | – | – | – | – | Size2212 | Operating Temperature -40 °C up to +125 °C | – | – | – | Length22.5 mm | Width22 mm | Height12 mm | – | – | Inductance12 µH | – | – | DC Resistance4.3 mΩ | Self Resonant Frequency13 MHz | – | Performance Rated Current20.1 A | Saturation Current @ 10%5 A | Saturation Current @ 30%25 A | MaterialMnZn | VersionSMT | – | – | – | – | – | MountSMT | ||||
| WCAP-CSGP MLCCs 16 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 16 V(DC) | – | – | – | – | – | – | – | Capacitance1 µF | Capacitance±10% | Rated Voltage16 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor10 % | Insulation Resistance0.1 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 25 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 25 V(DC) | – | – | – | – | – | – | – | Capacitance100 nF | Capacitance±10% | Rated Voltage25 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor3.5 % | Insulation Resistance5 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | Capacitance1 nF | Capacitance±10% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor2.5 % | Insulation Resistance10 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Width0.8 mm | Height0.8 mm | Pad Dimension0.4 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
 | WE-LQS SMT Power Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LQS SMT Power Inductor | – | – | – | – | – | – | – | – | – | – | Size5040 | Operating Temperature -40 °C up to +125 °C | – | – | – | Length5 mm | Width5 mm | Height4 mm | – | – | Inductance1000 µH | Rated Current0.2 A | Saturation Current0.24 A | DC Resistance6000 mΩ | Self Resonant Frequency1.9 MHz | – | – | – | – | – | – | – | – | – | – | – | MountSMT | ||||
 | 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 | – | – | – | – | – | – | – | – | – | – | SizeER19/4.8/15 | Operating Temperature -40 °C up to +125 °C | – | – | – | Length21.08 mm | Width23.37 mm | Height10.5 mm | – | – | Inductance153 µH | – | – | – | – | Insulation Test Voltage2250 V (DC) | – | – | – | – | VersionForward | Input Voltage 37 - 57 V (DC) | Output Voltage 112 V | Output Current 16 A | Auxiliary Voltage12 V | Turns Ratio4:4:2:2:4 | MountSMT |