LT4276

RECOMMENDED FOR NEW DESIGNS

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

Data Sheet Product Selection Table

Part Models: 12
1ku List Price: Starting From $1.95

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Part Details

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

Part Models: 12
1ku List Price: Starting From $1.95

Documentation

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
LT4276AHUFD#PBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4276AHUFD#TRPBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4276AIUFD#PBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4276AIUFD#TRPBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4276BHUFD#PBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4276BHUFD#TRPBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4276BIUFD#PBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4276BIUFD#TRPBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4276CHUFD#PBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4276CHUFD#TRPBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4276CIUFD#PBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4276CIUFD#TRPBF	28-Lead QFN (4mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products
		PCN21_0269_Form Material_Report Detailed Change Description Qualification Results Summary
LT4276AHUFD#PBF	PRODUCTION
LT4276AHUFD#TRPBF	PRODUCTION
LT4276AIUFD#PBF	PRODUCTION
LT4276AIUFD#TRPBF	PRODUCTION
LT4276BHUFD#PBF	PRODUCTION
LT4276BHUFD#TRPBF	PRODUCTION
LT4276BIUFD#PBF	PRODUCTION
LT4276BIUFD#TRPBF	PRODUCTION
LT4276CHUFD#PBF	PRODUCTION
LT4276CHUFD#TRPBF	PRODUCTION
LT4276CIUFD#PBF	PRODUCTION
LT4276CIUFD#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Tools & Simulations

LTspice 1

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

Models for the following parts are available in LTspice:

LT4276A

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.

Evaluation Kits

Smart Camera for 3D & 2D sensing

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Features and Benefits

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

Product Details

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

AD-3DSMARTCAM1-PRZ User Guide

Software

ADI 3D ToF Software Development Kit

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

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Product Details

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

DC2046A - Design Files
2.00M

DC2046A-A - Schematic
73.00K

DC2046A-A - Demo Manual (Rev.A)
779.00K

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

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Product Details

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

DC2046A - Design Files
2.00M

DC2046A-B - Schematic
73.00K

DC2046A-B - Demo Manual
1.00M

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

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Product Details

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

DC2262A - Design Files
2.00M

DC2262A-B - Schematic
145.00K

DC2262A-B - Demo Manual
1.00M

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

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Product Details

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

DC2046A - Design Files
2.00M

DC2046A-F - Demo Manual (Rev.G)
1.00M

DC2046A-F - Schematic
72.00K

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

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Product Details

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

DC2046A - Design Files
2.00M

DC2046A-C - Schematic
73.00K

DC2046A-C - Demo Manual
897.00K

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

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Product Details

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).

Resources

DC2262A - Design Files
2.00M

DC2262A-A - Schematic
173.00K

DC2262A-A - Demo Manual
1.00M

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

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Product Details

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

DC2046A - Design Files
2.00M

DC2046A-E - Demo Manual
0.00M

DC2046A-E - Schematic
73.00K

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

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Product Details

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

DC2046A - Design Files
2.00M

DC2046A-D - Schematic
72.00K

DC2046A-D - Demo Manual
1.00M

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 Details

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

DC2047A-A - Demo Manual
989.00K

DC2047A-A - Schematic
87.00K

DC2047A-A - Design Files
1.00M

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LT4276

Part Details

Documentation

Data Sheet 1

Reliability Data 1

User Guide 9

Technical Articles 1

Product Selector Card 3

Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

Evaluation Kits

Features and Benefits

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Software

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