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Analog Devices LT4276 | Demoboard DC2262A-B
LT4276, LT4321 PoE with Synchronous Forward and Ideal Diode Bridge
Overview
| Topology | Forward Converter |
| Input voltage | 37-57 V |
| Output 1 | 12 V / 7 A |
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-B supplies a 12V output at up to 7A. Italso demonstrates the use of an optional auxiliary powersupply input of 48V. When present, the auxiliary supplytakes priority over the PoE power path.
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC(mΩ) | fres(MHz) | Qty. | IR(A) | L1(mH) | RDC max.(Ω) | VR(V (AC)) | VT(V (RMS)) | Material | L(mm) | W(mm) | H(mm) | Mount | SamplesAvailability & Sample | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | SPECWE-HCI SMT Flat Wire High Current Inductor, 4.9 µH, 8.3 A | Availability – | 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 | Packaging Unit1000 | – | – | – | – | – | MaterialSuperflux | Length7 mm | Width6.9 mm | Height4.8 mm | MountSMT | –Check availability | |||
749022016 | SPEC10/100/1000 Base-T SMT Transformer, 350 µH, – | Availability – | Downloads– | Status Activei| Production is active. Expected lifetime: >10 years. | Product series 10/100/1000 Base-T SMT Transformer | Inductance350 µH | – | – | – | – | – | – | – | – | – | – | Insulation Test Voltage1500 V (RMS) | – | Length18.16 mm | Width16 mm | Height10.16 mm | MountSMT | –Check availability | ||
 | SPECWE-LF SMD Common Mode Power Line Choke in SMT, 2200 µH, – | Availability – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LF SMD Common Mode Power Line Choke in SMT | Inductance2200 µH | – | – | – | – | – | Packaging Unit200 | Rated Current2.75 A | Inductance [1]2.2 mH | DC Resistance [1]0.1 Ω | Rated Voltage250 V (AC) | Insulation Test Voltage1500 V (RMS) | MaterialMnZn | Length23.3 mm | Width18.5 mm | Height11.5 mm | – | –Check availability |
Availability Forecast
WE item number Packaging unitsLead time
––– weeks
| Expected Availability | Opening inventory | Quantity |
|---|---|---|
| Current Availability | – | – |
There is no forecast for this quantity request.
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