TPS2378DDAR

Overview

The TPS2378DDAR is a Powered Device (PD) interface controller compliant with IEEE 802.3at (PoE+) standards, manufactured by Texas Instruments. It supports Class 4 power classification with a maximum output power of 30 W. The device operates within a supply voltage range of 0 V to 57 V and features a maximum on-resistance of 750 mOhms. Current limiting is set at 850 mA, while the quiescent operating current is 960 uA. The component utilizes an SO-PowerPad-8 surface-mount package and functions reliably across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Integrates complete IEEE 802.3at PoE+ protocol logic for signature detection, two-event classification, and surge control without external microcontroller intervention.
• Provides high-efficiency power switching with low on-resistance and integrated inrush current limiting to protect upstream Power Sourcing Equipment.
• Includes comprehensive protection mechanisms such as thermal shutdown and fault monitoring to ensure reliable operation in embedded network applications.

Applications

• IP cameras and video surveillance systems
• Wireless access points (APs)
• VoIP telephones
• Edge computing nodes and IoT sensor gateways

Procurement Notes

Verify that the specific suffix 'DDAR' corresponds to the tape-and-reel packaging format required for automated surface-mount assembly processes. Confirm that the order quantity aligns with the standard reel size specifications provided by the manufacturer to ensure consistent handling and storage conditions during production integration.

Selection Notes

Select this component for designs requiring full IEEE 802.3at compliance with integrated protocol management. It is suitable for non-isolated PD architectures where minimizing bill-of-materials complexity is critical. Ensure the application environment stays within the specified -40°C to +85°C operating temperature range and that the PCB layout accommodates the SO-PowerPad-8 thermal pad requirements for adequate heat dissipation.

Part Context

This part belongs to the TPS2378 series of PoE PD controllers designed for Type 2 powered devices. It serves as a core interface solution for network terminals needing up to 30 W of power over Ethernet. The device simplifies system design by embedding all necessary signaling and power management functions into a single IC, reducing the need for separate protocol stacks or complex peripheral circuits.

Replacement Considerations

The TPS2378DDA is a pin-compatible alternative offering the same electrical characteristics but packaged in a tube instead of a reel. Designers should verify that their assembly equipment supports tube-based loading if substituting this variant. No other functional substitutes are documented in the provided reference material.