DC2584A-A - PoE++ 802.3bt PD Eval Board LT4295 | Analog Devices
Teilenummer: DC2584A-A ✓ Aktiv| Menge | Stückpreis | Gesamt |
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| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 25 | $0 | $0,00 |
| 50 | $0 | $0,00 |
| 100 | $0 | $0,00 |
DC2584A-A Übersicht
A PoE Powered Device evaluation board is a hardware development platform that lets engineers exercise the complete PD power path: PD detection, classification, inrush current limiting, forward-buck or flyback power conversion, and hot-swap protection. In the power management hierarchy, it sits at the board level above the PD interface controller IC, the switching regulator controller, and the ideal diode bridge controller that populate it.
Key features include true IEEE 802.3bt compliance supporting up to 71W delivered power, the LT4295 which integrates PD interface control and a switching regulator controller in a single device, and the LT4321 ideal diode bridge controller which replaces the four diodes of a conventional input bridge with MOSFETs to dramatically reduce conduction loss and improve overall efficiency.
Technically, the board accepts power via the RJ45 connector (J1) from a PSE or from a local 48V DC auxiliary supply input, enabling bench evaluation without a PoE injector. The ideal diode bridge minimizes input bridge dissipation, which is critical in 71W Class designs where a standard diode bridge would waste several watts and compromise thermal margins.
Typical applications include 802.3bt PD product development such as IP security cameras with heaters and PTZ motors, wireless access points, PoE lighting fixtures, video intercoms, and industrial network nodes. The board suits any design needing a compliant 71W PD front end evaluated against real PSE equipment.
Design consideration: when testing near the full 71W power level, ensure the auxiliary supply and cabling are rated for the input current, and observe thermal performance of the ideal diode MOSFETs and power transformer during extended operation.
This page synthesizes distributor availability data, the manufacturer evaluation board manual, and practical design guidance not found in a single source.
Drop-in-Alternativen für DC2584A-A – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
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DC2584A-B
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DC2584A-A Spezifikationen (herstellerveröffentlicht)
| Product Type | PoE Powered Device (PD) evaluation board |
| Featured ICs | LT4295, LT4321 |
| PoE Standard | IEEE 802.3bt (Draft 2.1) |
| Maximum Delivered Power | 71 W |
| Input via RJ45 | Yes (J1, from PSE) |
| Auxiliary Supply Input | 48 V DC local power supply |
| PD Interface | LT4295 PD interface and switching regulator controller |
| Input Bridge | LT4321 ideal diode bridge controller |
| Application | PoE++ Powered Device development |
| Transformer Part | PCA EPC3577G-LF (per EngineerZone) |
| Packaging Type | Bulk (evaluation board) |
DC2584A-A Schnittstellen & Anschlüsse
DC2584A-A bietet die folgenden, vom Hersteller veröffentlichten Schnittstellen und Anschlüsse: Leistungsaufnahme, Ethernet. Pinbelegung der Erweiterungsheader, Nummerierung der Anschlüsse und elektrische Grenzwerte sind in der Herstellerdokumentation definiert.
| Leistungsaufnahme | IEEE 802.3bt (Draft 2.1) |
| Ethernet | Yes (J1, from PSE) |
Siehe die Herstellerdokumentation für die vollständige Pinbelegung der Erweiterungsleiste und die Nummerierung der Steckverbinder-Pins.
Leistungs- und thermische Eigenschaften
| Leistungsaufnahme | IEEE 802.3bt (Draft 2.1) |
Vom Hersteller veröffentlichte Leistungs- und thermische Parameter für DC2584A-A.
Typische Anwendungen
DC2584A-A ist geeignet für 6 Anwendungs: 802.3bt PoE++ PD Product Development, IP Security Camera Power Front End, Wireless Access Point Design, PoE Lighting Fixture Development, Industrial Network Node Power, Bench Evaluation Without PoE Injector.
802.3bt PoE++ PD Product Development
The DC2584A-A serves as the reference platform for developing IEEE 802.3bt (Draft 2.1) Powered Device products requiring up to 71W. Its LT4295 handles the full PD interface - detection, classification, inrush current limiting, and switching regulator control - while the LT4321 ideal diode bridge minimizes input rectification loss. Engineers evaluate detection and classification against real PSE equipment via the RJ45 (J1) port, or use the 48V auxiliary input for bench bring-up without a PoE injector. Validating the EPC3577G-LF transformer-based power stage on this board de-risks the custom PCB design before committing to production tooling.
Empfohlen
IP Security Camera Power Front End
High-end IP cameras with heaters, PTZ motors, and IR illuminators frequently exceed the 25.5W ceiling of 802.3at and require 802.3bt power. The DC2584A-A demonstrates exactly this power class at 71W delivered. The LT4321 ideal diode bridge is particularly valuable in sealed camera enclosures where every watt of bridge dissipation adds heat that must be removed. Engineers use this board to validate PD classification behavior with camera-style load transients - motor startup and heater cycling - and to measure efficiency of the LT4295-controlled conversion stage before copying the proven LT4295/LT4321 circuit into the production camera PCB.
Empfohlen
Wireless Access Point Design
Enterprise Wi-Fi 6/6E access points draw 40-70W, making IEEE 802.3bt the dominant powering standard for ceiling-mounted installations where local AC is unavailable. The DC2584A-A platform, delivering up to 71W with compliant detection and classification, maps directly onto this use case. The board allows AP designers to verify interoperability with PoE switches from multiple vendors - a critical concern since 802.3bt classification involves LLDP-based power negotiation beyond physical-layer classification. The LT4295's integrated PD interface plus switching regulator control reduces solution footprint, which matters in compact AP enclosures.
Empfohlen
PoE Lighting Fixture Development
PoE lighting systems use Ethernet infrastructure to power LED fixtures, with 802.3bt providing the higher power tiers that luminaires require. The DC2584A-A gives lighting engineers a compliant 71W PD reference: the LT4295 manages classification so the PSE allocates sufficient power, and the LT4321 bridge preserves efficiency in fixtures with minimal airflow. The 48V auxiliary input allows developers to characterize LED driver stages independently of the PoE source. Testing on this board validates the detection, inrush, and thermal behavior that UL and interoperability certification will later exercise on the final fixture design.
Empfohlen
Industrial Network Node Power
Industrial Ethernet endpoints - sensors, actuators, gateways, and HMI panels - increasingly adopt PoE++ to eliminate separate power wiring in conformance with single-cable deployment strategies. The DC2584A-A demonstrates a robust 71W PD front end using the LT4295 and LT4321, both rated for the wide input conditions of PoE plants (approximately 37-57V at the PD after cable drop). Engineers can exercise the board against industrial PSE/injector hardware, validate inrush behavior with capacitive input loads typical of industrial electronics, and measure the efficiency gain from the ideal diode bridge in constrained DIN-rail enclosures.
Empfohlen
Bench Evaluation Without PoE Injector
A distinctive strength of the DC2584A-A is its 48V DC auxiliary supply input, which lets engineers evaluate the LT4295/LT4321 power stage on a standard lab bench without PoE injector equipment. Per the evaluation kit manual, power enters either from the PSE via RJ45 (J1) or from the local 48V auxiliary input. This dual-input architecture enables a two-phase workflow: first characterize conversion efficiency, output ripple, and thermal performance with a bench supply; then validate detection, classification, and power negotiation against real PSE hardware - separating power-stage issues from PD protocol issues during debugging.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für DC2584A-A – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | DC2584A-B |
|---|---|---|
| Package | Evaluation board (unique PCB assembly) | Evaluation board (same DC2584A platform) |
| Brand | Analog Devices | Analog Devices |
| PoE Standard | IEEE 802.3bt (Draft 2.1) | IEEE 802.3bt (Draft 2.1) |
| Maximum Delivered Power | 71 W | 71 W (verify per variant) |
| Featured PD Interface IC | LT4295 | LT4295 |
| Ideal Diode Bridge IC | LT4321 | LT4321 |
Wichtigste Unterscheidungsmerkmale
- True 802.3bt compliance at 71W class (vs. Lower-power 802.3at PD eval boards)
- Ideal diode bridge input stage (vs. Conventional diode-bridge PD designs)
- Dual power input architecture (vs. PoE-input-only evaluation boards)
Designhinweise
The DC2584A-A accepts power from two sources: the PSE via the RJ45 connector (J1) or a local 48V DC auxiliary supply. When evaluating at the full 71W level, ensure the bench supply can source the required input current (roughly 1.5A at 48V before conversion losses - estimate based on 71W delivered divided by nominal 48V input and typical efficiency). Verify cabling and connector ratings on the auxiliary input before extended full-load testing.
Estimated: at 71W output and, for example, 90% conversion efficiency, approximately 8W is dissipated on the board, concentrated in the LT4321-driven MOSFET bridge, the power transformer (PCA EPC3577G-LF), and the switching stage. During extended full-load tests, monitor MOSFET and transformer temperatures with a thermal camera or thermocouples; ensure airflow does not artificially flatter results compared with the intended final enclosure conditions.
The transformer on the DC2584A board is a PCA EPC3577G-LF; EngineerZone threads show users asking about alternatives. Any substitute transformer must match turns ratio, primary inductance, and saturation current, or regulation and efficiency will degrade and the LT4295 controller may hit current-limit or duty-cycle limits. Additionally, remember that testing detection and classification requires a real or simulated PSE - the 48V auxiliary input bypasses PD negotiation, so classification behavior cannot be validated from the auxiliary input alone.
Compliance-Informationen
Compliance status for the assembled evaluation board was not stated in the provided web data. The board complies with the IEEE 802.3bt (Draft 2.1) PoE standard as stated by Analog Devices; electrical standards compliance is distinct from environmental compliance (RoHS/REACH).