DC1567B PoE Power Sourcing Equipment (PSE) by Analog Devices

Status: Production
Series: LTC4274
RoHS: Compliant
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The LTC4274 is a single power sourcing equipment controller designed for use in IEEE 802.3 Type 1 and Type 2 (high power) compliant Power over Ethernet systems. External power MOSFETs enhance system reliability and minimize channel resistance, cutting power dissipation and eliminating the need for heatsinks even at Type 2 power levels. External power components also allow use at very high power levels while remaining otherwise compatible with the IEEE standard. 80V-rated port pins provide robust protection against external faults.The LTC4274 includes advanced power management features, including current and voltage readback and programmable ICUT and ILIM thresholds. Available C libraries simplify software development; an optional AUTO pin mode provides fully IEEE-compliant standalone operation with no software required. Proprietary 4-point PD detection circuitry minimizes false PD detection while supporting legacy phone operation. Midspan operation is supported with built-in 2-event classification and backoff timing. Host communication is via a 1MHz I2C serial interface.The LTC4274 is available in a 5mm × 7mm QFN package that significantly reduces board space compared with competing solutions.

Where to Buy

Prices starting from US$104.02

Distributor Stock
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Newark Electronics
from US$116.61
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element14
from US$113.28
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Farnell
from US$104.02
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Richardson RFPD
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Features

Compliant with IEEE 802.3at Type 1 and 2
0.34Ω Total Channel Resistance
130mW/Port at 600mA
Advanced Power Management
8-Bit Programmable Current Limit (ILIM)
7-Bit Programmable Overload Currents (ICUT)
Fast Shutdown
14.5-Bit Port Current/Voltage Monitoring
2-Event Classification
Very High Reliability 4-Point PD Detection
2-Point Forced Voltage
2-Point Forced Current
High Capacitance Legacy Device Detection
LTC4259A-1 and LTC4266 SW Compatible
1MHz I2C Compatible Serial Control Interface
Midspan Backoff Timer
Supports Proprietary Power Levels Above 25W
Available in 38-Pin 5mm × 7mm QFN Package

Last 6 months Inventory & Pricing History


Alternative Descriptions

Demo Brd, Power Over Enet/Pse Controller Rohs Compliant: Yes |Analog Devices, Inc. DC1567B | Newark Electronics
DEMO BRD, POWER OVER ENET/PSE CONTROLLER | element14
LTC4274 Power Over Ethernet Controller 54.7V Output Demonstration Circuit | Richardson RFPD


DC1567B Development Boards & Evaluation Kits by Linear Technology

DEMO BOARD POE & PSE CONTROLLER

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Demonstration circuit 1567B features the LTC®4274, 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 DC1567B 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 and classifies a PD, turns power on to the port, and disconnects port power without the need for a microcontroller. A two second backoff timer supports the midspan configuration. Only a single 55V supply is required to power the DC1567B. A simple regulator circuit on the board powers the digital supply of the LTC4274. The LTC4274 delivers low 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. The DC1567B has increased surge protection from the DC1567A.

Features


Specifications

Silicon Manufacturer Linear Technology
Silicon Core Number LTC4274
Kit Application Type Power Management
Application Sub Type Power Over Ethernet (POE) PSE Controller
Kit Contents Demo Board LTC4274
Product Range -
SVHC No SVHC (07-Jul-2017)
Features IEEE 802.3 Type 1/2 & Single Port PSE Midspan Power Injector PD Detection RJ45 51V-57V Supply

Frequently Asked Questions

Where can I find additional details, specifications and documents for a DC1567B?

Additional datasheets, footprints and schematics for DC1567B are listed on our Part Details page. You can also find images and similar parts to DC1567B on this page.

What pricing and inventory information can I view?

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What category does DC1567B fall under?

The DC1567B is listed under PoE Power Sourcing Equipment (PSE).

Can I view similar or alternative parts?

You can view similar parts to DC1567B when available in the PoE Power Sourcing Equipment (PSE) range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the DC1567B you can contact the distributor directly for product support, shipping queries etc.

Is the DC1567B RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Analog Devices.

Which authorised distributors for DC1567B have stock available?

Authorised distributors including Newark Electronics, element14, Farnell and Richardson RFPD have stock available or on a lead time for DC1567B.

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