LT4276
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LT4276

LTPoE++/PoE+/PoE PD Forward/Flyback Controller

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LTspice LT4276 - Power-over-Ethernet (PoE) Interface Controllers Download 10.46 KB
Part Models 12
1ku List Price Starting From $1.95
Features
  • IEEE802.3af/at and LTPoE++™ 90W Powered Device (PD) with Forward/Flyback Controller
  • LT4276A Supports All of the Following Standards:
    • LTPoE++ 38.7W, 52.7W, 70W and 90W
    • IEEE 802.3at 25.5W Compliant
    • IEEE 802.3af up to 13W Compliant
  • LT4276B is IEEE 802.3at/af Compliant
  • LT4276C is IEEE 802.3af Compliant
  • Superior Surge Protection (100V Absolute Maximum)
  • Wide Junction Temperature Range (–40°C to 125°C)
  • Auxiliary Power Support as Low as 9V
  • No Opto-Isolator Required for Flyback Operation
  • External Hot Swap™ N-Channel MOSFET for Lowest Power Dissipation and Highest System Efficiency
  • >94% End-to-End Efficiency with LT4321 Ideal Bridge
  • Available in a 28-Lead 4mm × 5mm QFN Package
Additional Details
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The LT4276 is a pin-for-pin compatible family of IEEE 802.3 and LTPoE++ Powered Device (PD) controllers. It includes an isolated switching regulator controller capable of synchronous operation in both forward and flyback topologies with auxiliary power support.

The LT4276A employs the LTPoE++ classification scheme, receiving 38.7W, 52.7W, 70W or 90W of power at the PD RJ45 connector, and is backwards compatible with IEEE 802.3. The LT4276B is a fully 802.3at compliant, 25.5W Type 2 (PoE+) PD. The LT4276C is a fully 802.3af compliant, 13W Type 1 (PoE) PD.

The LT4276 supports both forward and flyback power supply topologies, configurable for a wide range of PoE applications. The flyback topology supports No-Opto feedback. Auxiliary input voltage can be accurately sensed with just a resistor divider connected to the AUX pin.

The LT4276 utilizes an external, low RDS(ON) N-channel MOSFET for the Hot Swap function, maximizing power delivery and efficiency, reducing heat dissipation, and easing the thermal design.

Applications

  • High Power Wireless Data Systems
  • Outdoor Security Camera Equipment
  • Commercial and Public Information Displays
  • High Temperature Applications
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Documentation View All Documentation
LTspice LT4276 - Power-over-Ethernet (PoE) Interface Controllers Download 10.46 KB
Part Models 12
1ku List Price Starting From $1.95
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LT4276

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UPDATED 12/16/2015
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LT4276: LTPoE++/PoE+/PoE PD Forward/Flyback Controller Data Sheet

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LT4276: LTPoE++/PoE+/PoE PDフォワード/フライバック・コントローラ データシート

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Documentation

Documentation

Technical Documents 11
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Data Sheet 1

LT4276: LTPoE++/PoE+/PoE PD Forward/Flyback Controller Data Sheet

Reliability Data 1

R572 Reliability Data

User Guide 9

DC2262A-B - Demo Manual
DC2047A-A - Demo Manual
DC2046A-C - Demo Manual
DC2046A-F - Demo Manual (Rev.G)
DC2046A-E - Demo Manual
DC2046A-A - Demo Manual (Rev.A)
DC2046A-B - Demo Manual
DC2046A-D - Demo Manual
DC2262A-A - Demo Manual

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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LT4276CIUFD#PBF 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) external-link
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LT4276CIUFD#TRPBF 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) external-link
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 10

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AD-3DSMARTCAM1-PRZ

Smart Camera for 3D & 2D sensing

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AD-3DSMARTCAM1-PRZ

Smart Camera for 3D & 2D sensing

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AD-3DSMARTCAM1-PRZ
Smart Camera for 3D & 2D sensing

Features and Benefits

  • 3D and 2D sensing
  • AI Edge processing capability
  • WiFi and Gigabit Ethernet connectivity
  • Open Source SDK with Windows and Linux support 
Buy Now View Details

Product Detail

The AD-3DSMARTCAM1-PRZ is a 2D & 3D machine vision solution with AI edge processing capabilities. It can be used for implementing advanced machine vision applications for different industry segments including logistics, robotics, agriculture and people activity monitoring.

An open-source SDK that accompanies the hardware platform enables configuring the camera and extracting depth, IR and RGB data from the camera on the host system of your choice. Windows and Linux support are built into the SDK as well as sample code and wrappers for various languages including Python, C/C++ and MATLAB. The SDK also integrates with 3rd party technologies like OpenCV, Open3D and RoS.

APPLICATIONS

  • Logistics
  • Robotics
  • Agriculture
  • Building Management 
  • People Activity Monitoring
Specification Table
Camera
3D ToF sensor FoV 90x60, Range: 4m, Resolution 640x480 @ 30fps
RGB sensor FoV 128x68, Range 6m, Resolution 1920x1080 @ 30fps
Connectivity
WiFi 802.11a/b/g/n/ac, 867Mbps with dual stream in 802.11n, 2x2 Access Points with MIMO standard
Ethernet (optional) 1xRJ45 10M/100M/1G self-adaptive Ethernet port
Bluetooth 5.0 Bluetooth Class 1 or Class2 transmitter operation, Adaptive frequency hopping
Power supply
External power 12V DC @ 2A
Power over Ethernet (optional) PoE+ IEEE802.3-2012, max 20W
Operating Conditions
Temperature Range -25C to 60C
Operating Class IP66
Computing Resources
CPU Quad-core ARM A57 @ 1.43 GHz
GPU 128-core Maxwell
Memory 4 GB 64-bit LPDDR4 25.6 GB/s
Storage 16GB eMMC
Certifications
Safety, EMC, Environment Eye safe and conforms to necessary regional standards

Resources

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WIKI

AD-3DSMARTCAM1-PRZ User Guide reference design link

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Software

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ADI 3D ToF Software Development Kit reference design link

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DC2262A-A

LT4276A/LT4321 Demo Board | LTPoE++ (70W, 5V/13A) PD with DC/DC and Ideal Diode Bridge

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DC2262A-A

LT4276A/LT4321 Demo Board | LTPoE++ (70W, 5V/13A) PD with DC/DC and Ideal Diode Bridge

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DC2262A-A
LT4276A/LT4321 Demo Board | LTPoE++ (70W, 5V/13A) PD with DC/DC and Ideal Diode Bridge
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Product Detail

Demonstration circuit 2262 is a PoE Powered Device (PD) with a synchronous forward isolated power supply featuring the LT4276 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.

Resources

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ZIP

DC2262A - Design Files Download

2.00M

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DC2262A-A - Schematic Download

173.00K

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DC2262A-A - Demo Manual Download

1.00M

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DC2046A-E

LT4276A/LT4321 Demo Board | LTPoE++ (38.7W, 5V/7A) PD with DC/DC and Ideal Diode Bridge

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DC2046A-E

LT4276A/LT4321 Demo Board | LTPoE++ (38.7W, 5V/7A) PD with DC/DC and Ideal Diode Bridge

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DC2046A-E
LT4276A/LT4321 Demo Board | LTPoE++ (38.7W, 5V/7A) PD with DC/DC and Ideal Diode Bridge
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Product Detail

Demonstration circuit 2046A-E is a PoE powered device (PD) with an isolated power supply using synchronous flyback topology, featuring the LT4276 and ideal diode bridge controller (LT4321).



Resources

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DC2046A - Design Files Download

2.00M

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DC2046A-E - Demo Manual Download

0.00M

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DC2046A-E - Schematic Download

73.00K

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DC2046A-D

LT4276B/LT4321 Demo Board | PoE+(25W, 24V/1A) PD with DC/DC and Ideal Diode Bridge

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DC2046A-D

LT4276B/LT4321 Demo Board | PoE+(25W, 24V/1A) PD with DC/DC and Ideal Diode Bridge

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DC2046A-D
LT4276B/LT4321 Demo Board | PoE+(25W, 24V/1A) PD with DC/DC and Ideal Diode Bridge
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Product Detail

Demonstration circuit 2046A-D is a PoE powered device (PD) with an isolated power supply using synchronous flyback topology, featuring the LT4276 and ideal diode bridge controller (LT4321).



Resources

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ZIP

DC2046A - Design Files Download

2.00M

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DC2046A-D - Schematic Download

72.00K

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DC2046A-D - Demo Manual Download

1.00M

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DC2047A-A

LT4276B/LT4321 Demo Board | PoE+ (25W, 12V/1.9A) PD with DC/DC, Ideal Diode Bridge and 9V-57V AUX

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DC2047A-A

LT4276B/LT4321 Demo Board | PoE+ (25W, 12V/1.9A) PD with DC/DC, Ideal Diode Bridge and 9V-57V AUX

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DC2047A-A
LT4276B/LT4321 Demo Board | PoE+ (25W, 12V/1.9A) PD with DC/DC, Ideal Diode Bridge and 9V-57V AUX
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Product Detail

Demonstration circuit 2047A-A is an IEEE802.3at compliant Power over Ethernet (PoE) Powered Device (PD) with support for 9-57VDC and 24VAC auxiliary supply input. It features the LT4276 PD interface and switching regulator controller, the LT4321 PoE ideal diode bridge controller, and the LT4320 ideal diode bridge controller.

Resources

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PDF

DC2047A-A - Demo Manual Download

989.00K

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PDF

DC2047A-A - Schematic Download

87.00K

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DC2047A-A - Design Files Download

1.00M

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DC2046A-A

LT4276B/LT4321 Demo Board | PoE+ (25W, 3.3V/6.8A) PD with DC/DC and Ideal Diode Bridge

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DC2046A-A

LT4276B/LT4321 Demo Board | PoE+ (25W, 3.3V/6.8A) PD with DC/DC and Ideal Diode Bridge

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DC2046A-A
LT4276B/LT4321 Demo Board | PoE+ (25W, 3.3V/6.8A) PD with DC/DC and Ideal Diode Bridge
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Product Detail

Demonstration circuit 2046A-A is an Ethernet Alliance™ certified PoE powered device (PD) with an isolated power supply using synchronous flyback topology, featuring the LT4276 and ideal diode bridge controller (LT4321).

Resources

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ZIP

DC2046A - Design Files Download

2.00M

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PDF

DC2046A-A - Schematic Download

73.00K

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DC2046A-A - Demo Manual (Rev.A) Download

779.00K

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DC2046A-B

LT4276B/LT4321 Demo Board | PoE+ (25W, 5V/4.7A) PD with DC/DC and Ideal Diode Bridge

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DC2046A-B

LT4276B/LT4321 Demo Board | PoE+ (25W, 5V/4.7A) PD with DC/DC and Ideal Diode Bridge

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DC2046A-B
LT4276B/LT4321 Demo Board | PoE+ (25W, 5V/4.7A) PD with DC/DC and Ideal Diode Bridge
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Product Detail

Demonstration circuit 2046A-B is a PoE powered device (PD) with an isolated power supply using synchronous flyback topology, featuring the LT4276 and ideal diode bridge controller (LT4321)



Resources

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ZIP

DC2046A - Design Files Download

2.00M

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PDF

DC2046A-B - Schematic Download

73.00K

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DC2046A-B - Demo Manual Download

1.00M

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DC2262A-B

LT4276A/LT4321 Demo Board | LTPoE++ (90W, 12V/7A) PD with DC/DC and Ideal Diode Bridge

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DC2262A-B

LT4276A/LT4321 Demo Board | LTPoE++ (90W, 12V/7A) PD with DC/DC and Ideal Diode Bridge

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DC2262A-B
LT4276A/LT4321 Demo Board | LTPoE++ (90W, 12V/7A) PD with DC/DC and Ideal Diode Bridge
Buy Now View Details

Product Detail

Demonstration circuit 2262 is a PoE Powered Device (PD) with a synchronous forward isolated power supply featuring the LT4276 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.

Resources

pdf icon

ZIP

DC2262A - Design Files Download

2.00M

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PDF

DC2262A-B - Demo Manual Download

1.00M

pdf icon

PDF

DC2262A-B - Schematic Download

145.00K

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DC2046A-F

LT4276C/LT4321 Demo Board | PoE (13W, 5V/2.3A) PD with DC/DC and Ideal Diode Bridge

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DC2046A-F

LT4276C/LT4321 Demo Board | PoE (13W, 5V/2.3A) PD with DC/DC and Ideal Diode Bridge

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DC2046A-F
LT4276C/LT4321 Demo Board | PoE (13W, 5V/2.3A) PD with DC/DC and Ideal Diode Bridge
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Product Detail

Demonstration circuit 2046A-F is an Ethernet Alliance™ certified PoE Powered Device (PD) with an isolated power supply using synchronous flyback topology, featuring the LT4276 and ideal diode bridge controller (LT4321).

Resources

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ZIP

DC2046A - Design Files Download

2.00M

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DC2046A-F - Demo Manual (Rev.G) Download

1.00M

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DC2046A-F - Schematic Download

72.00K

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DC2046A-C

LT4276B/LT4321 Demo Board | PoE+ (25W, 12V/1.9A) PD with DC/DC and Ideal Diode Bridge

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DC2046A-C

LT4276B/LT4321 Demo Board | PoE+ (25W, 12V/1.9A) PD with DC/DC and Ideal Diode Bridge

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DC2046A-C
LT4276B/LT4321 Demo Board | PoE+ (25W, 12V/1.9A) PD with DC/DC and Ideal Diode Bridge
Buy Now View Details

Product Detail

Demonstration circuit 2046A-C is a PoE powered device (PD) with an isolated power supply using synchronous flyback topology, featuring the LT4276 and ideal diode bridge controller (LT4321).



Resources

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ZIP

DC2046A - Design Files Download

2.00M

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PDF

DC2046A-C - Schematic Download

73.00K

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PDF

DC2046A-C - Demo Manual Download

897.00K

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Evaluation Kits10

evaluation kit item images

AD-3DSMARTCAM1-PRZ

Smart Camera for 3D & 2D sensing
evaluation kit item images

DC2262A-A

LT4276A/LT4321 Demo Board | LTPoE++ (70W, 5V/13A) PD with DC/DC and Ideal Diode Bridge
evaluation kit item images

DC2046A-E

LT4276A/LT4321 Demo Board | LTPoE++ (38.7W, 5V/7A) PD with DC/DC and Ideal Diode Bridge
evaluation kit item images

DC2046A-D

LT4276B/LT4321 Demo Board | PoE+(25W, 24V/1A) PD with DC/DC and Ideal Diode Bridge
evaluation kit item images

DC2047A-A

LT4276B/LT4321 Demo Board | PoE+ (25W, 12V/1.9A) PD with DC/DC, Ideal Diode Bridge and 9V-57V AUX
evaluation kit item images

DC2046A-A

LT4276B/LT4321 Demo Board | PoE+ (25W, 3.3V/6.8A) PD with DC/DC and Ideal Diode Bridge
evaluation kit item images

DC2046A-B

LT4276B/LT4321 Demo Board | PoE+ (25W, 5V/4.7A) PD with DC/DC and Ideal Diode Bridge
evaluation kit item images

DC2262A-B

LT4276A/LT4321 Demo Board | LTPoE++ (90W, 12V/7A) PD with DC/DC and Ideal Diode Bridge
evaluation kit item images

DC2046A-F

LT4276C/LT4321 Demo Board | PoE (13W, 5V/2.3A) PD with DC/DC and Ideal Diode Bridge
evaluation kit item images

DC2046A-C

LT4276B/LT4321 Demo Board | PoE+ (25W, 12V/1.9A) PD with DC/DC and Ideal Diode Bridge
Tools & Simulations

Tools & Simulations 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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LT4276 - Power-over-Ethernet (PoE) Interface Controllers Download

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