PD77020-011000-TR

Overview

The PD77020-011000-TR is a Power over Ethernet (PoE) power management controller manufactured by Microchip Technology. It is based on the SAMD21 microcontroller and housed in a 5mm × 5mm 32-pin QFN package. The device operates within a supply voltage range of 0 V to 3.8 V and supports an operating temperature range from -40°C to +85°C. Designed for use with the PD77728 PoE manager, it facilitates port mapping, priority setting, and status monitoring for up to 16 powered devices.

Feature Summary

• Integrates a SAMD21-based controller for advanced system-level power management and configuration.
• Supports dynamic power allocation through Autoclass functionality and real-time protection mechanisms.
• Enables communication with host systems via a standardized 15-byte I2C protocol for state reporting.

Applications

• Power Sourcing Equipment (PSE) systems requiring centralized power budgeting
• Network infrastructure utilizing cascaded PoE managers for scalable deployment
• Industrial IoT gateways needing isolated digital control interfaces

Procurement Notes

Verify the specific firmware version indicated by the suffix against your system requirements. Confirm that the QFN-32 package dimensions align with your PCB layout constraints. Ensure compatibility with the PD77728 PoE manager if implementing a complete solution. Check current availability as distribution may be limited.

Selection Notes

Select this component when a dedicated controller is needed to manage multiple PoE ports efficiently. It is suitable for designs requiring precise power budgeting and port prioritization. Consider the integration complexity with the companion PD77728 switch IC. Evaluate the thermal performance within the specified industrial temperature range.

Part Context

This part belongs to Microchip's PoE ecosystem, specifically designed to work alongside the PD77728 family of managers. It serves as the intelligent brain for PSE applications, handling logic and communication while the switch IC manages physical layer power delivery. This separation allows for flexible system architectures and simplified design processes.

Replacement Considerations

No direct public substitute part numbers are confirmed for this specific variant. Designers should evaluate other Microchip PoE controllers or generic SAMD21 implementations if alternative sourcing is required.

FAQ

What is the primary function of the PD77020-011000-TR?

It acts as a PoE power management controller that handles port mapping, power budgeting, and system status monitoring for PoE networks.

How does the PD77020 communicate with the host processor?

It communicates using a 15-byte I2C protocol to transmit system, device, and port status information, including temperature alerts.