DC1567A Development Boards & Evaluation Kits by Linear Technology

IEEE802.3AT PSE EVALUATION BOARD

Education Maker & Hobbyist Electronics>Development Boards & Evaluation Kits>Power Management Development Kits
Status: Unknown
Series: -
RoHS: Unknown
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Demonstration circuit 1567A features the LTC4274, a single power sourcing equipment (PSE) controller designed for use in IEEE 802.3 Type 1 and Type 2 (high power) compliant Power over Ethernet (PoE) systems. The LTC4274 is configured in the DC1567A as a midspan power injector where data comes in from an existing network system and out, along with power, to a powered device (PD). The LTC4274 autonomously detects a PD, turns power on to the port, and disconnects port power without the need for a microcontroller. A 2-event classification and a two second backoff timer support the midspan configuration. Only a single 55V supply is required to power the DC1567A. A simple 3-component regulator circuit on the board powers the digital supply of the LTC4274. The LTC4274 delivers lowest-in-industry heat dissipation by utilizing a low RON external MOSFET and a 0.25Ω sense resistor, eliminating the need for expensive heat sinks. An external MOSFET also provide a more robust solution compared to an integrated MOSFET. Power controlled by the LTC4274 is connected to the center taps on the cable side of the Ethernet transformers for data pairs 4/5 and 7/8. An integrated RJ45 connector includes the Ethernet transformer, common mode termination, and LEDs. One LED is also controlled by the LTC4274 to indicate the port is powered. Test turrets provide test points for port power measurements.

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Features

Specifications

Silicon Manufacturer Linear Technology
Silicon Core Number LTC4274
Kit Application Type Power Management
Application Sub Type Power Over Ethernet (POE)
Kit Contents Demonstration Board LTC4274
Product Range -
SVHC No SVHC (07-Jul-2017)
Features Single PoE+ PSE Controller Fast Shutdown IEEE 802.3 Type 1/2 Midspan Backoff Timer

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