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reference designLTC4291-1 | Demoboard DC2685B

Analog Devices LTC4291-1 | Demoboard DC2685B

DC2683A and DC2684A-B LTC4291-1/LTC4292 4-Port IEEE 802.3bt PSE

Overview

TopologyOther Topology
Input voltage51-57 V
IC revisionA

Description

Demonstration circuit 2685B is a 4-port IEEE 802.3bt power sourcing equipment (PSE) composed of a DC2684A-B (daughter card) and DC2683A (motherboard). The DC2685B (kit) is used for evaluation of the LTC4291-1/LTC4292 PSE chipset. Up to four IEEE 802.3af, IEEE 802.3at, or IEEE 802.3bt powered devices (PDs) can be connected and powered from this system using a single power supply. A DC590 is connected to the DC2685B for I2C interfacing with QuikEval™.This demonstration manual provides a quick start procedure, a DC2684A-B daughter card overview, a DC2683A mother board overview, schematics, and layout printouts.

Features

  • Four PSE Ports
  • Two Power Channels per Port
  • Fully Compliant IEEE 802.3bt Type 3 and 4 PSE
  • Compliant Support for Type 1, 2, 3, and 4 PDs
  • Low Power Path Dissipation per Channel
  • 150mΩ Sense Resistance
  • 30mΩ or Lower MOSFET RDS(ON)
  • Chipset Provides Electrical Isolation
  • Eliminates Optos and Isolated 3.3V Supply
  • Very High Reliability Multipoint PD Detection
  • Connection Check Distinguishes Single-Signature and Dual-Signature PDs
  • Continuous, Dedicated Per-Port Power and Current Monitoring
  • Per-Port Power Policing
  • 1MHz I2C Compatible Serial Control Interface
  • Pin or I2C Programmable PD Power Up to 71.3W
  • Available in a 40-Lead 6mm × 6mm (LTC4292) and 24-Lead 4mm × 4mm (LTC4291-1) QFN Packages

Typical applications

  • PoE PSE Switches/Routers / PoE PSE Midspans

More information

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesf
(mm)		PinsTypeMountIR
(mA)		Working Voltage
(V (AC))		Operating TemperaturePolesL
(mm)		Vaporphase processH
(mm)		Operation Force
(g)		Electrical Life
(Cycles)		Actuator ColorWashable Samples
418117270902SPEC
–6 files

EDA models: Components
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 Active i| Production is active. Expected lifetime: >10 years.WS-DITV Compact THT with Raised Actuator 2.54 mm – 2 – – – – -40 °C up to +85 °C 2 6.08 not specified – 800 2000 White –
434123050816SPEC

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

–5 files

EDA models: Components
ZIP

CAD files
ZIP

Download all 5 files as zip archive
ZIP

 Active i| Production is active. Expected lifetime: >10 years.WS-TASV J-Bend SMT Tact Switch 6.0x3.5 mm – – – – 50 – -40 °C up to +85 °C – – not specified 5 160 50000 Black No
702937000SPEC
–3 files

CAD files
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Download all 3 files as zip archive
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 Active i| Production is active. Expected lifetime: >10 years.WA-SNSR Self-Retaining Spacer 4.8 – – – – – -30 °C up to +85 °C – 19.1 – – – – – –
749022016SPEC
 – Active i| Production is active. Expected lifetime: >10 years. 10/100/1000 Base-T SMT Transformer – 24 – SMT – – 0 °C up to +70 °C – 18.16 – 10.16 – – – –
62000311121SPEC
–7 files

EDA models: Components
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CAD files
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 Active i| Production is active. Expected lifetime: >10 years.WR-PHD Pin Header – 3 Straight THT 2000 200 -40 °C up to +105 °C – 6 – – – – – –
Order Code Data­sheet Simu­lation
418117270902SPEC
–
434123050816SPEC

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

–
702937000SPEC
–
749022016SPEC
62000311121SPEC
–
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesf
(mm)		PinsTypeMountIR
(mA)		Working Voltage
(V (AC))		Operating TemperaturePolesL
(mm)		Vaporphase processH
(mm)		Operation Force
(g)		Electrical Life
(Cycles)		Actuator ColorWashable Samples
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