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Analog Devices LT4295 | Demoboard DC2476A
High Efficiency IEEE 802.3bt (PoE++, Type 4, 62W/71W) PD with Flyback DC/DC Converter and Auxiliary Supply Input
Overview
| Topology | Buck Converter |
| Input voltage | 37-57 V |
| Output 1 | 24 V / 2.7 A |
| IC revision | 1 |
Description
Demonstration Circuit 2476A is an IEEE 802.3bt (Draft 2.2) compliant power over ethernet (PoE) powered device (PD). It features the LT®4295 PD interface and switching regulator controller and the LT4321 PoE ideal diode bridge controller.The LT4295 provides IEEE 802.3af (PoE, Type 1), IEEE802.3at (PoE+, Type 2), and IEEE 802.3bt (PoE++, Type 3and 4) compliant interfacing and power supply control. Itutilizes an external, low RDS(on) (30mΩ 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.
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Product series | L (µH) | VT (V (RMS)) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Material | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 744316100 | SPEC | 8 files | WE-HCI SMT Flat Wire High Current Inductor | 1 | – | 14.8 | 5.5 | 11.5 | 4.75 | 158 | Superflux | ||
| 744316470 | SPEC | 8 files | WE-HCI SMT Flat Wire High Current Inductor | 4.7 | – | 6 | 2.5 | 4.7 | 24.5 | 57 | Superflux | ||
 | 749022016 | SPEC | – | 10/100/1000 Base-T SMT Transformer | 350 | 1500 | – | – | – | – | – | – | ||
| 750316231 | SPEC | – | – | Flyback Transformer | – | – | – | – | – | – | – | – |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Product series | L (µH) | VT (V (RMS)) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Material | Samples |
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