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Analog Devices LTC4278 | Demoboard DC1561B
DC1561B - LTC4278 IEEE802.3at PD Controller with 12V Aux, Vout = 5V, Iout = 4.5A
Overview
| Topology | Flyback Converter |
| Input voltage | 8-57 V |
| Output 1 | 0.5 V / 4.5 A |
| IC revision | 1 |
Description
Demonstration circuit 1561B is a high power supply, featuring the LTC®4278. This board is a Type 2 (IEEE 802.3at) compliant, high power Power over Ethernet (PoE), Powered Device (PD). The DC1561B also features a wide auxiliary input voltage range of 9V to 57V. The demonstration boardcan connect to a Type 2 Power Sourcing Equipment (PSE) device, such as the DC1567.
The LTC4278 provides IEEE 802.3at standard (PoE+) PD interfacing and power supply control. When the PD fully powers, the PD interface passes power from the PSE to the switcher through an internal, low resistance, high power MOSFET. The highly integrated LTC4278 controls a high power, small power supply that utilizes a highly-efficient isolated flyback topology with synchronous rectification. The DC1561B outputs 5V at 4.5A.
DC1561B also demonstrates the use of an auxiliary wall adapter for nominal 12VDC, 24VAC/24VDC, or 48VDC systems. When present, the auxiliary supply is the dominant supply over PoE to provide power.
Features
REMARK:L1=180nH L2=8.2uH And L3=3.3uHRefer page no.11
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(mΩ) | VT(V (AC)) | Material | LR(µH) | fres(MHz) | Winding Style | Number of windings | L1(µH) | Zmax(Ω) | IR(mA) | RDC max.(Ω) | VR(V) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-HCC SMT High Current Cube Inductor, 8.2 µH, 8.9 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCC SMT High Current Cube Inductor | Inductance8.2 µH | Performance Rated Current8.9 A | Saturation Current @ 10%9.3 A | Saturation Current @ 30%12.5 A | DC Resistance15 mΩ | – | MaterialFerrite | Rated Inductance2.8 µH | Self Resonant Frequency36 MHz | – | Number of windings9.5 | – | – | – | – | – | ||||
 | WE-SL5 SMT Common Mode Line Filter, 3300 µH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-SL5 SMT Common Mode Line Filter | Inductance3300 µH | – | – | – | DC Resistance360 mΩ | Insulation Test Voltage300 V (AC) | – | – | – | Winding Stylebifilar | Number of windings2 | Inductance [1]3300 µH | Maximum Impedance10000 Ω | Rated Current650 mA | DC Resistance [1]0.36 Ω | Rated Voltage80 V |