LT4275BHDD#TRPBF

Overview

The LT4275BHDD#TRPBF is a Powered Device (PD) controller from Analog Devices, designed for Power over Ethernet applications. It supports IEEE 802.3af (PoE), 802.3at (PoE+), and LTPoE++ standards, enabling power delivery up to 90W. The device operates within a supply voltage range of 23V to 60V and features a maximum supply current of 2mA. It is housed in a compact 10-WFDFN package with exposed pad, suitable for surface mount installation. The component includes an auxiliary function pin and is rated for an operating temperature range of -40°C to 85°C.

Feature Summary

• Supports LTPoE++, IEEE 802.3at, and IEEE 802.3af PoE standards
• Enables high-power delivery up to 90W via single twisted pair
• Integrates auxiliary communication channel support
• Operates across wide input voltage range of 23V to 60V

Applications

• Powered devices requiring LTPoE++ compatibility
• High-power PoE endpoints supporting 802.3at
• Standard PoE infrastructure equipment
• Industrial networking devices

Procurement Notes

Verify the specific suffix 'BHDD' against official Analog Devices documentation to confirm exact electrical characteristics and temperature ratings. Ensure the tape and reel packaging format matches production requirements. Confirm RoHS compliance status through the manufacturer's material declaration. Validate that the source document explicitly lists this part number as active or available.

Selection Notes

Select this controller when designing systems requiring LTPoE++ support alongside standard PoE/PoE+ backward compatibility. The 10-DFN package suits space-constrained layouts. Verify that the application circuit can handle the 23V to 60V input range. Consider the auxiliary pin functionality if bidirectional data communication over power lines is required by the system architecture.

Part Context

The LT4275 belongs to the LT4275/LT4276 family of LTPoE++ controllers. These components are engineered to manage power negotiation and delivery for Powered Devices in Ethernet networks. The series enables higher power budgets than traditional PoE standards while maintaining compatibility with existing infrastructure.

FAQ

Does the LT4275BHDD support LTPoE++?

Yes, the LT4275 controller supports LTPoE++, IEEE 802.3at (PoE+), and IEEE 802.3af (PoE) standards.

What is the operating temperature range?

The specified operating temperature range is -40°C to 85°C.