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reference designLT4276 | Demoboard DC2262A-A

Analog Devices LT4276 | Demoboard DC2262A-A

LT4276, LT4321 PoE with Synchronous Forward and Ideal Diode Bridge

Overview

TopologyForward Converter
Input voltage37-57 V
Output 15 V / 13 A
IC revisionA

Description

Demonstration circuit 2262 is a PoE Powered Device (PD) with a synchronous forward isolated power supply featuring the LT®4276 and an ideal diode bridge controller (LT4321).The LT4276 provides IEEE802.3af (PoE, Type 1), IEEE802.3at (PoE+, Type 2), and LTPoE++ PD interfacing and power supply control. When the PD is connected to a PSE, the LT4276 turns on an external, low-resistance, high-power N-channel Hot Swap™ FET. The LT4276 controls a high-power, small-sized power supply that utilizes a highly efficient, synchronously rectified, active clamp forward topology. The LT4321 provides further efficiency improvement by minimizing bridge losses.

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Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Qty.
Version
VIN
VOut1(V)
IOut1(A)
Vaux(V)
n
Size
IR(A)
L1(mH)
RDC max.(Ω)
VR(V (AC))
VT(V (AC))
Material
L(mm)
W(mm)
H(mm)
Mount
Data rate
Ports
PoE
Improved CMRR
Operating Temperature
L(µH)
SamplesAvailability & Sample
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744314490
SPECWE-HCI SMT Flat Wire High Current Inductor, 8.3 A, 2.2 A

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.

Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
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
Packaging Unit1000 
VersionSMT 
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Size7050 
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MaterialSuperflux 
Length7 mm
Width6.9 mm
Height4.8 mm
MountSMT 
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Operating Temperature -40 °C up to +150 °C
Inductance4.9 µH
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7446632002
SPECWE-LF SMD Common Mode Power Line Choke in SMT, –, –

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
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Downloads11 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-LF SMD Common Mode Power Line Choke in SMT
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Packaging Unit200 
VersionSMT 
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SizeSH 
Rated Current2.75 A
Inductance [1]2.2 mH
DC Resistance [1]0.1 Ω
Rated Voltage250 V (AC)
Insulation Test Voltage1500 V (AC)
MaterialMnZn 
Length23.3 mm
Width18.5 mm
Height11.5 mm
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Operating Temperature -40 °C up to +125 °C
Inductance2200 µH
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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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Turns Ratio1:1 
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Insulation Test Voltage1500 V (AC)
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Length18.16 mm
Width16 mm
Height10.16 mm
MountSMT 
Data rate1000BASE-T 
Ports1 
PoEPoE+ (up to 1150 mA) 
Improved Common Mode RejectionNo 
Operating Temperature 0 °C up to +70 °C
Inductance350 µH
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750313095
SPECWE-PoE++ Power over Ethernet Plus Plus Transformer, –, –
Simu­lation–
Availability
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Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PoE++ Power over Ethernet Plus Plus Transformer
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VersionForward 
Input Voltage 40 - 57 V (DC)
Output Voltage 15 V
Output Current 117 A
Auxiliary Voltage10.75 V
Turns Ratio3.5:1:2.25 
SizeEFD20 
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Insulation Test Voltage2400 V (AC)
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Length23.11 mm
Width29.08 mm
Height11.43 mm
MountSMT 
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Operating Temperature -40 °C up to +125 °C
Inductance175 µH
–Check availability