PM8805TR

Overview

The PM8805TR is a system-in-package PoE-PD interface controller by STMicroelectronics, compliant with IEEE 802.3bt, 802.3at, and 802.3af standards. It integrates dual active bridges with 100V N-channel MOSFETs (0.2 Ω path resistance), a hot-swap MOSFET, and charge pump drivers. Operating within a 9V to 57V supply range, it supports up to 99.9W power levels and 4-pair applications. The device features programmable classification, thermal shutdown, and a PGD signal for external PWM control. Packaged in a 43-pin VFQFPN (8x8 mm) reel.

Feature Summary

• Integrates dual active bridges and hot-swap MOSFETs in a single system-in-package
• Supports high-power 4-pair PoE applications with IEEE 802.3bt compliance
• Provides intelligent PSE identification via T0, T1, and T2 open-drain signals
• Features advanced energy-saving modes and two-step current protection

Applications

• Point of sales systems requiring high-efficiency PoE power
• Retail logistics devices utilizing 4-pair PoE infrastructure
• Wireless access points needing robust PD interface solutions
• Medium-to-high power PoE switch mode power supplies

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest datasheet to ensure correct packaging configuration. Confirm that the component meets RoHS requirements and check for any recent Product Change Notifications regarding die redesign or manufacturing reshaping programs before finalizing procurement plans.

Selection Notes

Select this component for designs requiring integrated PoE-PD interface and active bridge rectification without external discrete components. It is suitable for applications supporting auxiliary power sources alongside Ethernet cables. Ensure the design accommodates the 43-VFQFPN package dimensions and thermal requirements for high-power operation up to 99.9W.

Part Context

This part belongs to the PM8805 family of Power over Ethernet controllers designed for Powered Devices. It serves as the physical layer interface for receiving power from Power Sourcing Equipment. The TR suffix indicates tape and reel packaging, facilitating automated surface-mount assembly processes in high-volume manufacturing environments.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.