TPS2376DG4

Overview

The TPS2376DG4 is a Power over Ethernet (PoE) Powered Device controller manufactured by Texas Instruments. It complies with the IEEE 802.3af standard for classifying and powering devices via Ethernet cabling. The component integrates an N-channel power FET with a maximum on-resistance of 1 ohm to minimize system heat dissipation. It operates within a supply voltage range of 0 V to 57 V and supports a current limit of 405 mA. Designed for surface-mount installation, it utilizes an 8-pin TSSOP package with a PowerPad thermal pad. The device functions reliably across an extended temperature range from -40°C to +85°C.

Feature Summary

• Integrates an N-channel power FET to reduce external component count and system thermal losses
• Provides comprehensive protection features including thermal shutdown, auto-retry, and fault response mechanisms
• Supports programmable current limiting and adjustable inrush current control for reliable startup
• Includes low-noise characteristics and system-level ESD protection capabilities

Applications

• IP surveillance cameras requiring IEEE 802.3af compliance
• WiMAX access points and wireless networking equipment
• Conference IP telephones and communication devices
• Industrial and medical equipment operating in harsh environments

Procurement Notes

Verify the specific suffix DG4 indicates the lead-free RoHS-compliant variant when sourcing. Confirm the package type matches the required PCB footprint, as this model uses an 8-pin TSSOP configuration. Ensure the design accounts for the thermal requirements associated with the integrated PowerPad. Cross-reference the manufacturer's latest datasheet to confirm active status and any updated electrical specifications before finalizing procurement plans.

Selection Notes

Select this component for designs requiring a compact, single-chip solution for IEEE 802.3af PoE applications. The integrated FET simplifies layout and reduces bill of materials compared to discrete solutions. Consider the 405 mA current limit and 1-ohm resistance when calculating power budgets and thermal management needs. This part is suitable for space-constrained devices where minimizing external passive components is critical for performance and cost efficiency.

Part Context

The TPS2376 series represents Texas Instruments' dedicated interface controllers for PoE powered devices. It enables data and power transmission over standard Ethernet cables without additional AC wiring. The device simplifies the implementation of PoE endpoints by combining classification, power delivery, and protection functions into a single integrated circuit, facilitating robust connectivity for networked peripherals.

Replacement Considerations

The TPS2376PW serves as a pin-compatible alternative within the same family. Verify that any substitute maintains the 802.3af compliance and similar electrical characteristics. Check for differences in package dimensions or thermal handling capabilities if replacing with non-TI equivalents.