LT4275CIDD#TRPBF

Overview

The LT4275CIDD#TRPBF is a Powered Device (PD) controller from Analog Devices, designed for IEEE 802.3af Type 1 applications delivering up to 13W. It operates within a supply voltage range of 23V to 60V and supports an auxiliary power input. The device utilizes an external N-channel MOSFET driven by an internal charge pump to minimize conduction losses. It features a 10-lead DFN package with exposed pad, suitable for surface mount installation.

Feature Summary

• Supports LTPoE++, PoE+, and PoE standards with proprietary classification
• Integrates charge pump to drive external N-channel MOSFET
• Includes onboard signature resistor and thermal protection
• Provides programmable soft-start via external capacitor

Applications

• High-power wireless data systems
• Outdoor security camera equipment
• Commercial and public information displays
• High-temperature industrial applications

Procurement Notes

Verify the specific suffix 'TRPBF' indicates tape and reel packaging when sourcing. Confirm RoHS compliance status through official documentation. Ensure the component matches the 10-DFN footprint requirements for your PCB layout. Cross-reference the manufacturer's latest datasheet for any pinout or electrical specification updates prior to final design approval.

Selection Notes

Select this model specifically for IEEE 802.3af Type 1 PD implementations requiring up to 13W. Choose the TRPBF variant if automated surface-mount assembly processes are utilized. Consider the LT4275A or B variants if higher power classifications like PoE+ or LTPoE++ are required. Verify that the external MOSFET selection aligns with the controller's drive capabilities.

Part Context

This component belongs to the LT4275 family of pin-compatible PD controllers. The series includes variants supporting different power levels, such as the LT4275A for high-power LTPoE++ applications and the LT4275B for PoE+. All members share similar control logic but differ in classification schemes and maximum power delivery capabilities defined by their respective suffixes.

Replacement Considerations

LT4275CIDD#PBF serves as the tube-packaged equivalent of this part number.