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Analog Devices LT4295 | Demoboard DC2584A / DC2584A-A
High Efficiency IEEE 802.3bt (PoE++, Type 4, 71W) PD with Forward DC/DC Converter
Details
| Topologie | Abwärtswandler |
| Eingangsspannung | 37-57 V |
| Ausgang 1 | 12 V / 5.5 A |
| IC-Revision | 1 |
Beschreibung
Demonstration circuit 2584A is an IEEE 802.3bt (Draft2.1) compliant Power over Ethernet (PoE) PoweredDevice (PD). It features the LT®4295 PD interface andswitching regulator controller and the LT4321 PoE idealdiode bridge controller.The LT4295 provides IEEE 802.3af (PoE, Type 1),IEEE 802.3at (PoE+, Type 2), and IEEE 802.3bt (PoE++,Type 3 and 4) compliant interfacing and power supplycontrol. It utilizes an external, low RDS(on) (30mΩ typical)N-channel FET for the hot swap function to improveefficiency. The LT4295 controls a DC/DC converter thatutilizes a highly efficient active-clamp forward convertertopology with synchronous rectification.The LT4321 controls eight low RDS(on) (30mΩ typical)N-channel FETs to further improve end-to-end powerdelivery efficiency and ease thermal design. This solutionreplaces the eight diodes typically found in a passivePoE rectifier bridge.The DC2584A-A accepts up to 71W of delivered powerfrom a Power Sourcing Equipment (PSE) via the RJ45connector (J1) or a local 48V DC power supply using theauxiliary supply input. When both supplies are connected,the auxiliary supply input has priority over the PoE input.The DC2584A-A supplies a 12V output at up to 5.5A
Weiterführende Informationen
Artikeldaten
Artikel Nr. | Datenblatt | Simulation | Downloads | Status | Produktserie | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC(mΩ) | fres(MHz) | VPE | RDC typ.(mΩ) | RDC max.(mΩ) | IR 1(A) | L1(mH) | RDC1 max.(Ω) | VR(V (AC)) | VT(V (RMS)) | Material | L(mm) | B(mm) | H(mm) | Montageart | MusterVerfügbarkeit & Muster | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | SPECWE-HCI SMT-Hochstrominduktivität, 4.9 µH, 8.3 A | Verfügbarkeit – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-HCI SMT-Hochstrominduktivität | Induktivität4.9 µH | Performance Nennstrom8.3 A | Sättigungsstrom 12.2 A | Sättigungsstrom @ 30%6.5 A | Gleichstromwiderstand14.5 mΩ | Eigenresonanzfrequenz56 MHz | Verpackungseinheit1000 | – | Gleichstromwiderstand15.95 mΩ | – | – | – | – | – | MaterialSuperflux | Länge7 mm | Breite6.9 mm | Höhe4.8 mm | MontageartSMT | –Verfügbarkeit prüfen | |||
 | SPECWE-XHMI SMT Speicherdrossel, 8.2 µH, 13.4 A | Verfügbarkeit – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-XHMI SMT Speicherdrossel | Induktivität8.2 µH | Performance Nennstrom13.4 A | Sättigungsstrom 19.4 A | Sättigungsstrom @ 30%20.45 A | Gleichstromwiderstand10 mΩ | Eigenresonanzfrequenz16 MHz | Verpackungseinheit300 | Gleichstromwiderstand10 mΩ | Gleichstromwiderstand11 mΩ | – | – | – | – | – | – | Länge11.6 mm | Breite10.5 mm | Höhe8.8 mm | MontageartSMT | –Verfügbarkeit prüfen | |||
749022016 | SPEC10/100/1000 Base-T SMT Transformer, 350 µH, – | Verfügbarkeit – | Downloads– | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | Produktserie 10/100/1000 Base-T SMT Transformer | Induktivität350 µH | – | – | – | – | – | – | – | – | – | – | – | – | Prüfspannung1500 V (RMS) | – | Länge18.16 mm | Breite16 mm | Höhe10.16 mm | MontageartSMT | –Verfügbarkeit prüfen | ||
 | SPECWE-LF SMT Stromkompensierte Netzdrossel in SMT, 2200 µH, – | Verfügbarkeit – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-LF SMT Stromkompensierte Netzdrossel in SMT | Induktivität2200 µH | – | – | – | – | – | Verpackungseinheit200 | – | Gleichstromwiderstand100 mΩ | Nennstrom [1]2.75 A | Induktivität [1]2.2 mH | Gleichstromwiderstand [1]0.1 Ω | Nennspannung250 V (AC) | Prüfspannung1500 V (RMS) | MaterialMnZn | Länge23.3 mm | Breite18.5 mm | Höhe11.5 mm | – | –Verfügbarkeit prüfen |
| Erwartete Verfügbarkeit | Eingehender Bestand | Menge |
|---|---|---|
| Aktuelle Verfügbarkeit | – | – |