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Analog Devices LTC4292 | 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

Products

Order Code Data­sheet Simu­lation Downloads Product seriesf
(mm)
PolesL
(mm)
Vaporphase processH
(mm)
Operation Force (Value)
(g)
Electrical Life
(Cycles)
Actuator ColorPins
(pcs)
RowsGenderTypeIR
(mA)
Packaging Samples
418117270902SPEC
6 files WS-DITV Compact THT with Raised Actuator 2.54 mm 2 6.08 not specified 800 2000 White 2 Tube
434123050816SPEC
5 files WS-TASV J-Bend SMT Tact Switch 6.0x3.5 mm not specified 5 160 50000 Black 50 Tape and Reel
702937000SPEC
3 files WA-SNSR Self-Retaining Spacer 4.8 19.1
749022016SPEC
10/100/1000 Base-T SMT Transformer 18.16 10.16 24
62000311121SPEC
6 files WR-PHD 2.00 mm THT Pin Header 6 3 Single Pin Header Straight 2000 Bag
Order Code Data­sheet Simu­lation
418117270902SPEC
434123050816SPEC
702937000SPEC
749022016SPEC
62000311121SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Product seriesf
(mm)
PolesL
(mm)
Vaporphase processH
(mm)
Operation Force (Value)
(g)
Electrical Life
(Cycles)
Actuator ColorPins
(pcs)
RowsGenderTypeIR
(mA)
Packaging Samples