LTC4290
Info : RECOMMENDED FOR NEW DESIGNS
searchIcon
cartIcon

LTC4290

8-Port PoE/PoE+/LTPoE++ PSE Analog Controller

Show More showmore-icon

Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 6
1ku List Price Starting From $8.31
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
Additional Details
show more Icon

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.

Applications

  • PoE PSE Switches/Routers
  • PoE PSE Midspans
Part Models 6
1ku List Price Starting From $8.31

close icon
Documentation

Documentation

Video

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC4290AIUJ#PBF
  • HTML
  • HTML
LTC4290AIUJ#TRPBF
  • HTML
  • HTML
LTC4290BIUJ#PBF
  • HTML
  • HTML
LTC4290BIUJ#TRPBF
  • HTML
  • HTML
LTC4290CIUJ#PBF
  • HTML
  • HTML
LTC4290CIUJ#TRPBF
  • HTML
  • HTML

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Dec 28, 2020

- 20_0245

Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LTC4290AIUJ#PBF

PRODUCTION

LTC4290AIUJ#TRPBF

PRODUCTION

LTC4290BIUJ#PBF

PRODUCTION

LTC4290BIUJ#TRPBF

PRODUCTION

LTC4290CIUJ#PBF

PRODUCTION

LTC4290CIUJ#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Dec 28, 2020

- 20_0245

arrow down

Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LTC4290AIUJ#PBF

PRODUCTION

LTC4290AIUJ#TRPBF

PRODUCTION

LTC4290BIUJ#PBF

PRODUCTION

LTC4290BIUJ#TRPBF

PRODUCTION

LTC4290CIUJ#PBF

PRODUCTION

LTC4290CIUJ#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

reference details image

DC1843B

LTC4290B/LTC4271: (DC1680 + DC1842) 8-Port 25.5W Demo Kit (requires DC590)

zoom

DC1843B

LTC4290B/LTC4271: (DC1680 + DC1842) 8-Port 25.5W Demo Kit (requires DC590)

LTC4290B/LTC4271: (DC1680 + DC1842) 8-Port 25.5W Demo Kit (requires DC590)

Product Detail

Demonstration kit DC1843B is an 8-port Ethernet Alliance certified 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 Analog Devices 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.

reference details image

DC590B

Isolated USB Serial Controller for QuikEval-Compatible Demo Boards

Recently Viewed