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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 revisionF

Description

Demonstration circuit 2262 is a PoE Powered Device (PD)with a synchronous forward isolated power supply featuringthe 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 interfacingand power supply control. When the PD is connected toa PSE, the LT4276 turns on an external, low-resistance,high-power N-channel Hot Swap™ FET. The LT4276 controlsa high-power, small-sized power supply that utilizesa highly efficient, synchronously rectified, active clamp forward topology. The LT4321 provides further efficiencyimprovement by minimizing bridge losses.The DC2262A-A supplies a 5V output at up to 13A. Italso demonstrates the use of an optional auxiliary powersupply input of 48V. When present, the auxiliary supplytakes priority over the PoE power path.

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC
(mΩ)
fres
(MHz)
VersionVINVOut1
(V)
IOut1
(A)
Vaux
(V)
nSizeIR
(A)
L1
(mH)
RDC max.
(Ω)
VR
(V (AC))
VT
(V (DC))
MaterialL
(mm)
W
(mm)
H
(mm)
Mount Samples
744314490SPEC

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.

8 files Active i| Production is active. Expected lifetime: >10 years.WE-HCI SMT Flat Wire High Current Inductor 4.9 8.3 2.2 6.5 14.5 56 SMT 7050 Superflux 7 6.9 4.8 SMT
750313095SPEC
9 files Active i| Production is active. Expected lifetime: >10 years.WE-PoE++ Power over Ethernet Plus Plus Transformer 175 Forward 40 - 57 V (DC) 5 17 10.75 3.5:1:2.25 EFD20 2400 23.11 29.08 11.43 SMT
7446632002SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WE-LF SMT Common Mode Power Line Choke 2200 SMT SH 2.75 2.2 0.1 250 1500 MnZn 23.3 18.5 11.5
Order Code Data­sheet Simu­lation
744314490SPEC

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.

750313095SPEC
7446632002SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC
(mΩ)
fres
(MHz)
VersionVINVOut1
(V)
IOut1
(A)
Vaux
(V)
nSizeIR
(A)
L1
(mH)
RDC max.
(Ω)
VR
(V (AC))
VT
(V (DC))
MaterialL
(mm)
W
(mm)
H
(mm)
Mount Samples