TPS2375D

Overview

The TPS2375D is a single-channel IEEE 802.3af Power over Ethernet (PoE) Powered Device controller manufactured by Texas Instruments. It integrates a high-voltage switch with a current limit of 405 mA and a maximum on-resistance of 1 Ohm. The device operates within a supply voltage range of 0 V to 57 V and supports output power up to 12.95 W. Designed for surface-mount installation in an 8-SOIC package, it functions across an extended temperature range from -40°C to +85°C. The component draws a typical operating supply current of 240 µA.

Feature Summary

• Complies with IEEE 802.3af PoE standards for powered device classification and control
• Integrates a high-voltage power switch with internal current limiting capabilities
• Supports operation across industrial temperature ranges suitable for harsh environments

Applications

• IEEE 802.3af compliant network endpoint devices
• VoIP telephones requiring integrated power management
• Wireless access points utilizing PoE power sourcing equipment
• Network surveillance cameras with low power consumption profiles

Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm package type and tape/reel specifications. Ensure compatibility with your PCB footprint for the SOIC-8 configuration. Confirm RoHS compliance status through the manufacturer's latest datasheet or certification documents before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring strict adherence to IEEE 802.3af Class 0 or Class 1 classifications. The integrated switch simplifies bill of materials by eliminating external MOSFETs. Consider the 405 mA current limit when sizing downstream DC/DC converters to ensure stable operation under maximum load conditions without triggering protection circuits.

Part Context

The TPS2375 belongs to Texas Instruments' dedicated PoE interface controller family. It serves as a foundational solution for legacy 802.3af implementations. Unlike newer Type 2 controllers, this part focuses on lower power applications. It provides essential classification and power switching logic required for basic PoE endpoints.

Replacement Considerations

The TPS2375DR is a direct pin-compatible alternative differing only in packaging format. Verify that any substitute maintains the same 802.3af compliance and thermal characteristics.