TPS23861PWR

Overview

The TPS23861PWR is a quad IEEE 802.3at Power Sourcing Equipment (PSE) controller manufactured by Texas Instruments, designed for PoE applications. It operates within a supply voltage range of 3V to 3.6V and supports input voltages from 44V to 57V. The device provides a maximum output power of 25.5 W per channel with a current limit of 70 mA. It complies with both 802.3af and 802.3at standards. The component functions reliably across an operating temperature range of -40°C to 85°C and is housed in a 28-TSSOP surface-mount package.

Feature Summary

• Integrates four independent channels compliant with IEEE 802.3at and 802.3af standards for centralized PoE management.
• Supports high-power delivery up to 25.5 W per port while maintaining strict current limiting at 70 mA.
• Operates on low-voltage control logic with a supply range of 3V to 3.6V, interfacing directly with standard microcontrollers.

Applications

• Centralized Power Sourcing Equipment (PSE) controllers in network infrastructure
• PoE+ midspan injectors for upgrading existing Ethernet cabling
• High-density switch designs requiring integrated PSE functionality

Procurement Notes

Verify the specific ordering suffix to confirm the tape and reel packaging configuration required for automated assembly processes. Ensure that the selected variant matches the necessary RoHS compliance status and humidity sensitivity classification for your manufacturing environment. Cross-reference the manufacturer part number against official distributor catalogs to confirm availability and lead times before finalizing procurement plans.

Selection Notes

Select this component when designing systems requiring four-channel PoE+ capability with integrated PSE control logic. The 28-TSSOP package offers a compact footprint suitable for space-constrained board layouts. Consider the 3.3V logic interface compatibility when selecting peripheral components and microcontrollers for the control circuitry.

Part Context

This part belongs to the TPS23861 series of PoE controllers from Texas Instruments. It serves as a specialized solution for implementing IEEE 802.3at compliant power sourcing equipment. The device integrates essential control features into a single IC, reducing the bill of materials compared to discrete implementations.

Replacement Considerations

The TPS23861PW is available in tube packaging as an alternative to the TSSOP-28 reel format. Verify functional equivalence regarding pinout and electrical specifications before substituting packaging types in production designs.