LTC4274IUHF#TRPBF

Overview

The LTC4274IUHF#TRPBF is a single Power Sourcing Equipment (PSE) controller designed for IEEE 802.3 Type 1 and Type 2 compliant Power over Ethernet systems. It supports PoE, PoE+, and LTPoE++ standards with a maximum output power of 38.7W. The device operates within an input voltage range of 45V to 57V and features I2C interface connectivity. It utilizes a 38-pin QFN EP package and functions reliably across an operating temperature range of -40°C to 85°C.

Feature Summary

• Supports proprietary detection and classification schemes for mutual identification between PSE and PD while maintaining compatibility with existing Type 1 and Type 2 devices.
• Includes advanced power management capabilities such as current and voltage readback along with programmable I_CUT and I_LIM thresholds.
• Features 80V-rated port pins to provide robust protection against external faults.

Applications

• Single-port PoE/PoE+ midspan injectors
• IEEE 802.3af/at compliant network switches
• LTPoE++ powered device interfaces

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing components. Confirm that the part status remains active through official Analog Devices channels. Ensure compliance with RoHS3 specifications and EAR99 export classifications during procurement processes.

Selection Notes

Select this component for designs requiring external MOSFET integration to minimize channel resistance and eliminate heatsink requirements at Type 2 power levels. Consider the availability of C libraries for software development simplification and the option for AUTO pin mode to achieve fully IEEE-compliant standalone operation without complex host processing.

Part Context

This controller belongs to the LTC4274 family of PoE controllers manufactured by Analog Devices Inc. It serves as a core power management solution for Ethernet infrastructure, enabling high-power delivery over standard cabling. The device complements other PMIC offerings in the portfolio by addressing specific PoE standard compliance needs.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify functional equivalence with other single-channel PSE controllers if direct replacement is required.

FAQ

Does the LTC4274 support LTPoE++ standards?

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

What is the maximum output power capability?

The maximum output power is 38.7W.