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Analog Devices LT4295 | Demoboard DC2539A-A
High Efficiency IEEE802.3bt (PoE++, Type 3, 51W) PD with Flyback DC/DC Converter and Auxiliary Power Input
Details
| Topologie | Sperrwandler |
| Eingangsspannung | 37-57 V |
| Ausgang 1 | 12 V / 3.9 A |
| IC-Revision | A |
Beschreibung
Demonstration circuit 2539A is an IEEE802.3bt (Draft 2.1)compliant Power over Ethernet (PoE) Powered Device(PD). It features the LT®4295 PD interface and switchingregulator controller and the LT4321 PoE ideal diodebridge controller.The LT4295 provides IEEE802.3af (PoE, Type 1),IEEE802.3at (PoE+, Type 2), and IEEE802.3bt (PoE++,Type 3) compliant interfacing and power supply control. Itutilizes an external, low RDS(ON) (57mΩ typical) N-channelFET for the hot swap function to improve efficiency. TheLT4295 controls a DC/DC converter that utilizes a highlyefficient Flyback topology with synchronous rectification.The LT4321 controls eight low RDS(ON) (30mΩ typical)N-channel FETs to further improve end-to-end power delivery efficiency and ease thermal design. This solutionreplaces the eight diodes typically found in a passive PoErectifier bridge.The DC2539A-A accepts up to 51W of delivered powerfrom a Power Sourcing Equipment (PSE) via the RJ45connector (J1) or a local 48VDC power supply using theauxiliary supply input. When both supplies are connected,the auxiliary supply input has priority over the PoE input.The DC2539A-A supplies a 12V output at up to 3.9A.
Weiterführende Informationen
Artikeldaten
Artikel Nr. | Datenblatt | Simulation | Downloads | Status | Produktserie | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC(mΩ) | fres(MHz) | Material | VPE | Version | Vin | VOut1(V) | IOut1(A) | L(µH) | n | VT(V) | Bauform | Vaux(V) | RDC 1(Ω) | RDC 2(Ω) | RDC 3(Ω) | Montageart | MusterVerfügbarkeit & Muster | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | SPECWE-HCI SMT-Hochstrominduktivität, 6 A, 2.5 A | Verfügbarkeit – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-HCI SMT-Hochstrominduktivität | Performance Nennstrom6 A | Sättigungsstrom 12.5 A | Sättigungsstrom @ 30%4.7 A | Gleichstromwiderstand24.5 mΩ | Eigenresonanzfrequenz57 MHz | MaterialSuperflux | Verpackungseinheit1500 | VersionSMT | – | – | – | Induktivität4.7 µH | – | – | Bauform5040 | – | – | – | – | MontageartSMT | –Verfügbarkeit prüfen | |||
| SPECWE-HCI SMT-Hochstrominduktivität, 29.9 A, 14 A | Verfügbarkeit – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-HCI SMT-Hochstrominduktivität | Performance Nennstrom29.9 A | Sättigungsstrom 114 A | Sättigungsstrom @ 30%25 A | Gleichstromwiderstand1.25 mΩ | Eigenresonanzfrequenz507 MHz | MaterialSuperflux | Verpackungseinheit1500 | VersionSMT | – | – | – | Induktivität0.22 µH | – | – | Bauform5040 | – | – | – | – | MontageartSMT | –Verfügbarkeit prüfen | |||
 | SPECWE-PoE+ Übertrager für Power over Ethernet plus, –, – | Verfügbarkeit – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-PoE+ Übertrager für Power over Ethernet plus | – | – | – | – | – | – | – | VersionFlyback | Input Voltage 41 - 57 V (DC) | Ausgangsspannung 112 V | Ausgangsstrom 14 A | Induktivität18 µH | Übersetzungsverhältnis2:1:1 | Prüfspannung1500 V | BauformEFD20 | Hilfsspannung12 V | Gleichstromwiderstand 10.02 Ω | Gleichstromwiderstand 20.011 Ω | Gleichstromwiderstand 30.066 Ω | MontageartSMT | –Verfügbarkeit prüfen |
| Erwartete Verfügbarkeit | Eingehender Bestand | Menge |
|---|---|---|
| Aktuelle Verfügbarkeit | – | – |