PD77728ILQ-0111-TR

Overview

The PD77728ILQ-0111-TR is a fully integrated Power Sourcing Equipment (PSE) manager designed for IEEE 802.3bt Type 4 applications. It supports eight PoE ports, utilizing a QFN-56 package with dimensions of 8 mm x 8 mm and an integrated thermal pad. The device operates within a supply voltage range of 3 V to 3.6 V and functions across an ambient temperature range of -40°C to +85°C. It delivers up to 100 W output power per port, featuring a total port resistance of 160 mΩ. The component achieves low power dissipation of less than 2W at full load and withstands surges up to 2 kV without additional components.

Feature Summary

• Complies with IEEE 802.3bt standards for high-power PoE delivery
• Integrates FETs, detection resistors, and port diodes for each of the eight ports
• Supports multiple Powered Device (PD) types including standard and legacy configurations
• Capable of surge protection up to 2 kV without requiring external protective components

Applications

• Enterprise network switches and routers
• Small-to-medium business (SMB) and SOHO networking equipment
• Commercial and industrial lighting systems
• Scalable PoE management systems connecting up to twelve units for 48-port configurations

Procurement Notes

Verify the specific ordering suffix and firmware version against official Microchip documentation before procurement. Confirm that the QFN-56 package requirements align with your PCB layout capabilities. Ensure compliance with RoHS regulations and Moisture Sensitivity Level 3 handling procedures during storage and assembly processes.

Selection Notes

Select this component for designs requiring high-density PoE integration with minimal external bill of materials. Consider the 100 W output capability and low thermal dissipation characteristics for efficient heat management in compact enclosures. Evaluate the scalability features if expanding beyond single-chip port counts.

Part Context

This part belongs to Microchip's dedicated PoE management IC family, engineered to simplify system design by integrating switching and control functions. It serves as a core solution for modern Ethernet infrastructure, enabling efficient power distribution over standard cabling while maintaining compliance with evolving industry standards for higher power delivery.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.