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reference designLT4321 | Demoboard DC2911A

Analog Devices LT4321 | Demoboard DC2911A

IEEE 802.3bt and LTPoE++ Interoperable Powered Device

Overview

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Description

The LT®4293 is an LTPoE++/IEEE 802.3af/at/bt-compliant powered device (PD) interface controller. The T2P output distinguishes between LTPoE++ and IEEE 802.3bt power sourcing equipment (PSE) during mutual identification and negotiation of available power. The LT4293 utilizes an external, low RDS(ON), N-channel, hot swap MOSFET and supports the LT4320/LT4321 ideal bridges, to extend the end-to-end power delivery efficiency and eliminate costly heat sinks. The LT4293 also includes a power good output, onboard signature resistor, undervoltage lockout, and thermal protection. Start-up inrush current is adjustable with an external capacitor. Auxiliary power override is supported as low as 9V with the AUX pin. The LT4293 can be configured to support all possible LTPoE++, 802.3bt, 802.3at and 802.3af power levels with external component changes. Pin-for-pin compatibility with the LT4275 and LT4294 family of PD Interface Controllers enables easy migration between LTPoE++ PDs and IEEE 802.3bt-compliant PDs.

Features

  • LTPoE++®/IEEE 802.3bt Powered Device (PD) Controller
  • Supports Up to 90W PDs
  • Distinguishes Between LTPoE++ and IEEE 802.3bt PSEs
  • 5-Event Classification Sensing
  • Superior Surge Protection (100V Absolute Maximum)
  • Wide Junction Temperature Range (–40°C to 125°C)
  • Overtemperature Protection
  • Integrated Signature Resistor
  • External Hot Swap N-Channel MOSFET for Lowest Power Dissipation and Highest System Efficiency
  • Configurable Aux Power Support as Low as 9V
  • Pin Compatible with LT4275A/B/C and LT4294
  • Available in 10-Lead MSOP and 3mm × 3mm DFN Packages

Typical applications

  • Commercial and Public Information Displays
  • Outdoor Security Camera Equipment
  • High Temperature Industrial Applications
  • High Power Wireless Data Systems

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
λDom typ.(nm)
Emitting Color
λPeak typ.(nm)
IV typ.(mcd)
VF typ.(V)
Chip Technology
2θ50% typ.(°)
Data rate
Ports
PoE
Improved CMRR
Operating Temperature
VT(V (RMS))
Mount
L(µH)
Pins
L(mm)
H(mm)
IR(A)
Working Voltage(V (AC))
SamplesAvailability & Sample
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150080VS75000
SPECWL-SMCW SMT Mono-color Chip LED Waterclear, 570 nm, Bright Green
Simu­lation
Availability
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Downloads8 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWL-SMCW SMT Mono-color Chip LED Waterclear
Dominant Wavelength [typ.]570 nm
Emitting ColorBright Green 
Peak Wavelength [typ.]572 nm
Luminous Intensity [typ.]40 mcd
Forward Voltage [typ.]2 V
Chip TechnologyAlInGaP 
Viewing Angle Phi 0° [typ.]140 °
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Operating Temperature -40 °C up to +85 °C
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MountSMT 
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Length2 mm
Height0.7 mm
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749022016
SPECWE-LAN LAN Transformer, –, –
Simu­lation
Availability
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Downloads4 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-LAN LAN Transformer
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Data rate1000BASE-T 
Ports1 
PoEPoE+ (up to 1150 mA) 
Improved Common Mode RejectionNo 
Operating Temperature 0 °C up to +70 °C
Insulation Test Voltage1500 V (RMS)
MountSMT 
Inductance350 µH
Pins24 
Length18.16 mm
Height10.16 mm
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60800213421
SPECWR-PHD Jumper, –, –
Simu­lation–
Availability
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Downloads3 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Jumper
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Operating Temperature -25 °C up to +105 °C
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Pins2 
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Rated Current3 A
Working Voltage200 V (AC)
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