LT4276

PRODUCTION

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
LT4276
LTPoE++/PoE+/PoE PD Forward/Flyback Controller
LTPoE++ 70W Power Supply in a Forward Mode LT4276 Family Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 9

Technical Articles 1

Data Sheet

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

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Software Resources

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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LT4276A
LTspice

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

eval board
schematic 1
AD-3DSMARTCAM1-PRZ

Smart Camera for 3D & 2D sensing

Buy Now View Details

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

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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 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).

eval board
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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 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)



eval board
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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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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.

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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 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).

eval board
schematic 28
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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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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).



eval board
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DC2262A-A

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

Buy Now View Details

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.

eval board
schematic 38
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schematic 43
DC2046A-E

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

Buy Now View Details

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).



eval board
schematic 44
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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 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).



eval board
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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

Buy Now View Details

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.
AD-3DSMARTCAM1-PRZ
Smart Camera for 3D & 2D sensing
AD-3DSMARTCAM1-PRZ
DC2046A-A
LT4276B/LT4321 Demo Board | PoE+ (25W, 3.3V/6.8A) PD with DC/DC and Ideal Diode Bridge
DC2046A-A Application Circuit DC2046A-A Application Circuit DC2046A-A Application Circuit DC2046A-A Application Circuit DC2046A-A Application Circuit EA Certified 4
DC2046A-B
LT4276B/LT4321 Demo Board | PoE+ (25W, 5V/4.7A) PD with DC/DC and Ideal Diode Bridge
DC2046A-B Demo Board DC2046A-B Demo Board DC2046A-B Demo Board DC2046A-B Demo Board DC2046A-B Demo Board DC2046A-B - Schematic
DC2262A-B
LT4276A/LT4321 Demo Board | LTPoE++ (90W, 12V/7A) PD with DC/DC and Ideal Diode Bridge
DC2262A-B Demo Board DC2262A-B Demo Board DC2262A-B Demo Board DC2262A-B Demo Board
DC2046A-F
LT4276C/LT4321 Demo Board | PoE (13W, 5V/2.3A) PD with DC/DC and Ideal Diode Bridge
DC2046A-F Demo Board DC2046A-F Demo Board DC2046A-F Demo Board DC2046A-F Demo Board DC2046A-F Application Circuit DC2046A-F Application Circuit DC2046A-F Application Circuit DC2046A-F Application Circuit DC2046A-F Application Circuit EA Certified 3
DC2046A-C
LT4276B/LT4321 Demo Board | PoE+ (25W, 12V/1.9A) PD with DC/DC and Ideal Diode Bridge
DC2046A-C Demo Board DC2046A-C Demo Board DC2046A-C Demo Board DC2046A-C Demo Board DC2046A-C Demo Board DC2046A-C - Schematic
DC2262A-A
LT4276A/LT4321 Demo Board | LTPoE++ (70W, 5V/13A) PD with DC/DC and Ideal Diode Bridge
DC2262A-B Demo Board DC2262A-B Demo Board DC2262A-B Demo Board DC2262A-B Demo Board
DC2046A-E
LT4276A/LT4321 Demo Board | LTPoE++ (38.7W, 5V/7A) PD with DC/DC and Ideal Diode Bridge
DC2046A-E Demo Board DC2046A-E Demo Board DC2046A-E Demo Board DC2046A-E Demo Board DC2046A-E Demo Board DC2046A-E - Schematic
DC2046A-D
LT4276B/LT4321 Demo Board | PoE+(25W, 24V/1A) PD with DC/DC and Ideal Diode Bridge
DC2046A-D Demo Board DC2046A-D Demo Board DC2046A-D Demo Board DC2046A-D Demo Board DC2046A-D Demo Board DC2046A-D - Schematic
DC2047A-A
LT4276B/LT4321 Demo Board | PoE+ (25W, 12V/1.9A) PD with DC/DC, Ideal Diode Bridge and 9V-57V AUX
DC2047A-A Evaluation Board DC2047A-A Evaluation Board - Top View DC2047A-A Evaluation Board - Bottom View DC2047A-A - Schematic

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