DC1843B PoE Power Sourcing Equipment (PSE) by Analog Devices

PoE Power Sourcing Equipment (PSE)
Status: Production
Series: LTC4290
RoHS: Compliant
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The LTC4290/LTC4271 chipset is an 8-port power sourcing equipment (PSE) controller designed for use in IEEE 802.3at Type 1 and Type 2 (high power) compliant Power over Ethernet (PoE) systems. Transformer-isolated communication protocol replaces expensive opto-couplers and complex isolated 3.3V supply resulting in significant BOM cost savings. The LTC4290/LTC4271 chipset delivers lowest-in-industry heat dissipation by utilizing low-RDS(ON) external MOSFETs and 0.25Ω sense resistors.Advanced power management features include per-port 12-bit current monitoring ADCs, DAC-programmable current limit, and versatile fast shut-down of preselected ports. Advanced power management host software is available under a no-cost license. PD discovery uses a proprietary dual-mode 4-point detection mechanism ensuring excellent immunity from false PD detection. Midspan PSEs are supported with 2-event classification and a 2 second backoff timer. The LTC4290/LTC4271 includes an I2C serial interface operable up to 1MHz.The LTC4290/LTC4271 is available in multiple power grades allowing delivered PD power up to 90W.

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Features

Eight Independent PSE Channels
Compliant with IEEE 802.3at Type 1 and 2
Chipset Provides Electrical Isolation
Reduced BOM Cost
Eliminates up to 6 High Speed Opto-Couplers
Eliminates Isolated 3.3V Power Supply
Low Power Dissipation
0.25Ω Sense Resistance Per Channel
Very High Reliability 4-Point PD Detection
2-Point Forced Voltage
2-Point Forced Current
VEE and VPORT Monitoring
1 Second Rolling IPORT Averaging
Supports 2-Pair and 4-Pair Output Power
1MHz I2C Compatible Serial Control Interface
Available In Three Power Grades
A-Grade – LTPoE++™ 38.7W to 90W
B-Grade – PoE+ 25.5W
C-Grade – PoE 13W
Available In a 40-Lead 6mm × 6mm (LTC4290) and 24-Lead 4mm × 4mm (LTC4271) QFN Package

Last 6 months Inventory & Pricing History

Alternative Descriptions

LTC4290B/LTC4271 Demonstration circuit | Richardson RFPD

DC1843B Development Boards & Evaluation Kits by Linear Technology

DEMO BOARD LTC4290B/LTC4271 POE & PSE

Education Maker & Hobbyist Electronics>Development Boards & Evaluation Kits>Power Management Development Kits
Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock
Demonstration kit DC1843B is an 8-port IEEE 802.3at Type 2 power sourcing equipment (PSE) composed of a DC1842B daughter card and DC1680B motherboard. The kit is used for evaluation of the LTC4290B and LTC4271 PSE chipset. Up to 8 powered devices (PDs) can be connected and powered from this system using a single power supply. A DC590 is connected to the DC1843 for I2C interfacing with QuikEval™. This demonstration manual provides a Quick Start Procedure, a DC1842B overview, a DC1680B overview, schematics, and layout printouts. Refer to the Layout Guide for Demonstration Circuit 1842B when laying out the LTC4290B/LTC4271 circuit. Contact Linear Technology for this document. The DC1842B has increased surge protection over the DC1842A. The DC1680B uses discrete Ethernet transformers while the DC1680A has an integrated 12-port RJ45 jack.

Features

Specifications

Silicon Manufacturer Linear Technology
Silicon Core Number LTC4290B LTC4271
Kit Application Type -
Application Sub Type Power Over Ethernet (POE) PSE Controller
Kit Contents Demo Kit Composed of Mother Board LTC4290B & Daughter Board LTC4271
Product Range -
SVHC No SVHC (15-Jan-2018)
Features 8 Port IEEE 802.3at Type 2 PSE with Digital Isolation I2C Digital Test Points 51-57V Supply

Frequently Asked Questions

Where can I find additional details, specifications and documents for a DC1843B?

Additional datasheets, footprints and schematics for DC1843B are listed on our Part Details page. You can also find images and similar parts to DC1843B on this page.

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What category does DC1843B fall under?

The DC1843B is listed under PoE Power Sourcing Equipment (PSE).

Can I view similar or alternative parts?

You can view similar parts to DC1843B when available in the PoE Power Sourcing Equipment (PSE) range under the specifications section at the bottom of the details page.

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Submit any questions directly to the customer support team of the distributor listing the product. For the DC1843B you can contact the distributor directly for product support, shipping queries etc.

Is the DC1843B RoHS compliant?

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

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