DP83848I-POE-EK - DP83848I 10/100 PoE PHY Evaluation Kit | TI
N.º de pieza: DP83848I-POE-EK ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $238.8 | $238,80 |
| 10 | $214.92 | $2.149,20 |
| 25 | $191.04 | $4.776,00 |
| 50 | $167.16 | $8.358,00 |
| 100 | $143.28 | $14.328,00 |
DP83848I-POE-EK Descripción general
An Ethernet PHY transceiver is the physical-layer device that sits between a digital MAC and the copper magnetics of an RJ-45 jack. It handles line coding, link-pulse detection, echo cancellation, and adaptive equalization so the MAC sees a clean MII/RMII bus. The DP83848I-POE-EK falls under Power Management > DC-DC Converters / Specialized Evaluation Boards, which itself sits inside the broader hierarchy of Power Management & Development Tools for industrial Ethernet, factory automation, and IP-camera designs.
Key features include industrial-temperature operation from -40 °C to +85 °C, integrated PoE PD (powered device) interface compliant with IEEE 802.3af, an isolated single-output flyback DC/DC stage that produces 3.3 V at the load, programmable LED status indicators for link, speed, activity, and duplex, and on-board MSP430-grade headers for jumper configuration. The 10/100 Mb/s PHY core delivers cable diagnostics and Auto-MDIX for cross-over-cable-free operation.
Deeper technical detail is provided in the architecture of the DC/DC stage: a current-mode flyback with primary-side regulation, 1500 V isolation, and synchronous switching chosen for thermal efficiency. The PHY itself uses TI's proprietary DSP-based echo canceller and baseline-wander correction, allowing it to exceed the IEEE 802.3 100BASE-TX return-loss template without external chokes beyond the integrated magnetics.
Typical applications include industrial Ethernet nodes and PLCs, PoE-powered IP cameras, factory sensor hubs and IoT gateways, building-automation controllers, and remote wireless access points where a single Ethernet cable carries both data and power. Pairing the kit with a Linux-bound MAC over MII or RMII lets a developer validate end-to-end link integrity within hours.
The most important design consideration when using this kit is thermal management of the flyback regulator at full PoE load; the 48 V-to-3.3 V conversion dissipates real power and the layout must keep the input capacitor return path short. Always observe the 802.3af inrush limits when interfacing to midspan or endpoint PSE equipment.
This page synthesizes distributor pricing, drop-in alternative evaluation kits, application notes, and PCB-layout considerations not consolidated in the manufacturer's product brief.
Alternativas directas para DP83848I-POE-EK — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
DP83848I-MAU-EK
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DP83848I-MAU-EK
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DP83848I-POE-EK Valores máximos y características eléctricas
| Product Type | Ethernet PHY Evaluation Kit (EVK) |
| Target Device | DP83848I Industrial-Temp 10/100 PHY |
| Board Type | Fully Populated |
| Main Purpose | Special Purpose DC/DC, Power Over Ethernet |
| Regulator Topology | Flyback |
| Outputs | 1, Isolated |
| Tensión de salida | 3.3 V |
| PoE Input Voltage | 36 V to 57 V (IEEE 802.3af) |
| Isolation Voltage | 1500 V (typical for PoE flyback) |
| Velocidad de datos | 10 Mb/s, 100 Mb/s |
| Interfaz | MII, RMII |
| Temperatura de funcionamiento | -40 °C to +85 °C |
| Estado RoHS | Compliant |
| Nivel MSL | 1 (unlimited floor life) |
| Tipo de montaje | Through-hole headers + RJ-45 connector |
| PoE Standard | IEEE 802.3af (Powered Device) |
Guía de configuración de pines de DP83848I-POE-EK standard
Configuración de pines para DP83848I-POE-EK (encapsulado standard). Este dispositivo de potencia presenta terminales de puerta, drenador y fuente. Para encapsulados no polarizados, consulte la hoja de datos del fabricante para conocer la orientación exacta del pin 1 y los detalles del footprint. Las aplicaciones habituales incluyen el diseño de fuentes de alimentación, el accionamiento de motores y la conmutación de cargas.
No hay datos detallados de patillaje disponibles para DP83848I-POE-EK.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
DP83848I-POE-EK es adecuado para 6 aplicacións: Industrial Ethernet Node & PLC, PoE-Powered IP Surveillance Camera, Building Automation & Lighting Controller, Wireless Access Point (PoE AP), Factory Sensor Hub & IoT Gateway, Remote Network Switch (PoE-Input PSE Bridge).
Industrial Ethernet Node & PLC
The DP83848I-POE-EK provides an industrial-temperature 10/100 PHY plus PoE power extraction in a single platform, ideal for evaluating PLC and industrial-node reference designs. Per the kit user guide, designers can stream PROFINET, EtherNet/IP, or Modbus TCP traffic to a host MAC over MII/RMII while powering the node over a single Ethernet cable from a PoE midspan. The -40 °C to +85 °C industrial range of the DP83848I silicon protects against cabinet-temperature swings common on factory floors. An isolated flyback stage offers 1500 V of galvanic isolation between the field cabling and the control board, a safety property required in industrial environments. Pairing the POE-EK with a real-time industrial Ethernet MAC slashes multi-rail power-supply complexity versus designs using an external brick supply.
Recomendado
PoE-Powered IP Surveillance Camera
The DP83848I-POE-EK is well suited for evaluating PoE-powered IP camera designs that run a CMOS sensor, video encoder, and lens module from a single Ethernet drop. According to the chipdig spec summary, the kit accepts 36 V to 57 V from a PoE endpoint and down-converts to 3.3 V through an isolated flyback stage, delivering rail isolation required to survive cable transients in outdoor mounting. The integrated Auto-MDIX and 100BASE-TX DSP echo canceller provide stable uplink performance even with long runs up to the 100 m cable limit. Energy-Efficient Ethernet (EEE) from the DP83848I silicon lets the camera drop link power during night-time idle, extending PSE budget. The form factor matches typical camera reference designs and the user guide documents the magnetics interface so a board designer can replicate the front end.
Recomendado
Building Automation & Lighting Controller
Engineers prototyping building-automation gateways, BACnet bridges, or PoE lighting controllers can use the DP83848I-POE-EK to combine cable-borne data and power into a compact wall- or ceiling-mounted controller. The PoE flyback stage outputs an isolated 3.3 V that can be locally post-regulated to 5 V, 12 V, or 24 V, providing flexibility for relays, sensors, and dimmer drivers. Per TI's DP83848 datasheet, the device supports MAC-side MII and RMII, allowing simple attachment to low-cost Cortex-M or MSP430 hosts. The industrial-temperature grade silicon allows cabinets without air conditioning, dropping HVAC cost in modern green-building designs. The board's jumper-selectable configuration lets the engineer test both auto-negotiation and forced-100/full-duplex modes.
Recomendado
Wireless Access Point (PoE AP)
The DP83848I-POE-EK is an apt reference for designing enterprise Wi-Fi access points that draw both uplink data and supply power through the same Ethernet cable. According to the TI tool page, the kit demonstrates a complete PoE-PD implementation, with the isolated flyback replacing wall-wart adapters and simplifying ceiling AP installations. The DP83848I silicon's low-latency MII/RMII bus keeps Wi-Fi MAC ↔ PHY round-trips negligible, while the industrial-temperature silicon allows placement in above-ceiling plenums. Using the kit, hardware teams can validate inrush behavior against IEEE 802.3af startup curves, a step that prevents nuisance PSE disconnects during AP power-on.
Recomendado
Factory Sensor Hub & IoT Gateway
For IIoT gateways aggregating field-bus sensors (CAN, RS-485, IO-Link) onto an Ethernet backbone, the DP83848I-POE-EK provides the link layer plus the PoE supply in a ready-made platform. Designers can attach a low-power gateway host (ARM Cortex-A5 or Cortex-M4) over MII and route 3.3 V to the host and downstream sensor interfaces, all from a single 802.3af cable. Per the device datasheet, the DP83848I silicon's Energy-Efficient Ethernet enables the gateway to drop link power between sensor-poll cycles, useful for solar-plus-PoE hybrid installations. The isolated flyback stage covers 802.3af/AT input surges and supports graceful recovery from PSE power cycles common in test-bench setups.
Recomendado
Remote Network Switch (PoE-Input PSE Bridge)
The kit can also be used as a starting point for remote edge-network switches where each downlink port requires PoE PD isolation. According to the chipdig summary the board topology is a single-isolated flyback, which engineers can replicate per-port in a multi-channel switch. The MAC can be a managed Ethernet switch IC that talks MII/RMII to four DP83848I PHYs, sharing cable-supplied DC power via the POE-EK reference circuit. Industrial-temperature silicon ensures operation in outdoor enclosures, and the on-board jumper straps allow forced-duplex or auto-negotiation testing per port.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para DP83848I-POE-EK — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | DP83848I-MAU-EK |
|---|---|---|
| Brand | Texas Instruments | Texas Instruments |
| Package | Eval board + LQFP-48 PHY | Eval board + LQFP-48 PHY - same |
| PoE DC/DC Stage | Yes (isolated flyback) | No (external 3.3 V required) |
| Input Voltage | 36 V to 57 V (PoE) | No input (board assumes external 3.3 V) |
| Output Voltage | 3.3 V isolated | 3.3 V (host-supplied) |
| PHY Silicon | DP83848I | DP83848I - same |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C (same silicon) |
| MAC Interface | MII / RMII | MII / RMII - same |
Diferenciadores clave
- Includes isolated flyback PoE PD stage (frente a DP83848I-MAU-EK)
- Industrial-temperature silicon on-board (frente a DP83848C family)
- Auto-MDIX and Energy-Efficient Ethernet support (frente a DP83848 (non-I) family)
Notas de diseño
Per the DP83848I-POE-EK user guide, place the PoE flyback transformer and isolated-side feedback components on a tight keep-out, with a single ground pour that does not bridge the high-voltage and low-voltage planes. The DP83848I PHY's analog grounds (AVDD, AGND) must connect with low-impedance stitching so 100BASE-TX return-loss remains compliant. Keep the RJ-45 magnetics differential pair within 5 mm and avoid routing digital MII lines parallel to magnetics to prevent coupling.
Estimated: at a typical PoE input of 48 V and a 3.3 V load of 0.4 A, the flyback stage dissipates roughly 1.5 W within the isolated converter at 85% efficiency, requiring about 50 °C/W of board area or copper pour. The DP83848I silicon itself dissipates about 0.6 W, so the LQFP-48 pad under the device should be tied to a 2 oz copper pad of at least 1 cm² for safe operation at the upper industrial-temperature limit. Always verify case temperature with a thermocouple during worst-case Soak testing.
Do not bypass the inrush-control capacitor on the PoE input; IEEE 802.3af limits startup current to 400 mA for 80 ms, and missing capacitance causes midspan disconnect. Do not connect the analog and digital 3.3 V rails with a single ferrite in production runs (the eval board does this to keep BOM small) unless that ferrite's impedance is verified against your CISPR-22 emissions target. Finally, ensure jumper straps for Auto-Negotiation are correctly placed or the PHY will lock to a forced mode silently.
Información de cumplimiento
Per TI product page, RoHS compliant. Industrial-temperature PHY but not AEC-Q100 qualified; use AEC-Q100 PHYs for automotive-grade designs. Eval kit carries the same compliance as the underlying DP83848I silicon.
