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reference designLT4295

Analog Devices LT4295

IEEE 802.3bt PD Interface with Forward/Flyback Controller

Overview

TopologyFlyback Converter
Switching frequency214-300 kHz
Output 124 V / 2.4 A

Description

The LT®4295 is an IEEE 802.3af/at/bt(Draft 2.0)-compliantpowered device (PD) interface controller with aswitching regulator controller. The T2P output indicatesthe number of classification events received during IEEE802.3bt-compliant mutual identification and negotiationof available power.

Features

IEEE 802.3af/at/bt(Draft 2.0) Powered Device (PD)with Forward/Flyback Controllern Supports Up to 71 Watt PDsn 5-Event Classification Sensingn Superior Surge Protection (100V Absolute Maximum)n Wide Junction Temperature Range (–40°C to 125°C)n >94% End-to-End Efficiency with LT4321 Ideal Bridgen External Hot Swap N-Channel MOSFET for LowestPower Dissipation and Highest System Efficiencyn No-Opto Flyback Operationn Auxiliary Power Support as Low as 9Vn Easy Migration of LTPoE++® PDs to IEEE 802.3bt PDsn Pin Compatible with LT4276A/B/Cn 28-Lead 4mm × 5mm QFN Package

Typical applications

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

More information

Products

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Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
Qty.
SamplesAvailability & Sample
744314490
SPECWE-HCI SMT Flat Wire High Current Inductor, 4.9 µH, 8.3 A
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
Inductance4.9 µH
Performance Rated Current8.3 A
Saturation Current @ 10%2.2 A
Saturation Current @ 30%6.5 A
DC Resistance14.5 mΩ
Self Resonant Frequency56 MHz
MaterialSuperflux 
Packaging Unit1000 
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750316231
SPECFlyback Transformer, –, –
Simu­lation–
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Status Activei| Production is active. Expected lifetime: >10 years.
Product series Flyback Transformer
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