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Product Detailed Parameters
- Description：IC POE CNTRL 1 CHANNEL 20QFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Controller (PSE)
- Number of Channels：1
- Power - Max：90 W
- Internal Switch(s)：No
- Auxiliary Sense：No
- Standards：802.3at (PoE+), 802.3af (PoE), LTPoE++
- Voltage - Supply：45V ~ 57V
- Current - Supply：1.7mA
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：20-WFQFN Exposed Pad
- Supplier Device Package：20-QFN (4x5)
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Overview
The LTC4279IUFD#TRPBF is a single-port Power Sourcing Equipment (PSE) controller manufactured by Analog Devices Inc. It supports IEEE 802.3at (PoE+), 802.3af (PoE), and LTPoE++ standards. The device operates within a supply voltage range of 3V to 3.6V and draws a typical supply current of 1.7mA. It is housed in a compact 20-lead QFN package measuring 4mm x 5mm, designed for surface-mount installation. The component functions as a dedicated controller for managing power delivery over Ethernet data lines.
Feature Summary
- Supports multiple PoE standards including 802.3at, 802.3af, and LTPoE++
- Integrated control logic for single-port power sourcing equipment
- Compact surface-mount packaging suitable for space-constrained designs
Applications
- Power sourcing equipment for network switches
- Midspan power injectors
- Access point power controllers
Procurement Notes
Verify the specific suffix TRPBF indicates tape-and-reel packaging when ordering. Confirm the operating temperature range matches application requirements. Ensure compatibility with existing PCB footprints for the 20-QFN package. Check for recent product change notifications regarding manufacturing updates.
Selection Notes
Select this component for applications requiring support for legacy PoE and high-power LTPoE++ standards in a single-port configuration. Consider the low supply current for efficiency-sensitive designs. Evaluate the 20-QFN footprint against available board space constraints compared to larger packages.
Part Context
This part belongs to the LTC4279 family of PoE controllers from Analog Devices. It serves as a specialized solution for implementing compliant power sourcing equipment. The device integrates necessary control functions to manage power negotiation and delivery over Ethernet cables according to industry standards.
Replacement Considerations
LTC4279IS#TRPBF offers the same functionality in a 16-lead SOIC package. LTC4279IUFD#PBF provides the identical electrical performance in a tube-packaged variant instead of tape-and-reel.
