TPS23785BPWP

Overview

The TPS23785BPWP is a high-power, high-efficiency Power over Ethernet (PoE) Powered Device (PD) interface and DC-to-DC controller manufactured by Texas Instruments. Designed for IEEE 802.3at (PoE+) and 802.3af standards, it integrates a power switch and a synchronous buck converter to deliver up to 30W of output power. The device operates within a supply voltage range of 0V to 57V and supports a maximum duty cycle of 78%. It features an adjustable current limit of 850mA and a typical on-resistance of 750mOhms. The component functions reliably across an extended temperature range from -40°C to +125°C and is housed in a 24-pin HTSSOP package.

Feature Summary

• Integrates PoE PD interface with synchronous DC-to-DC conversion for high efficiency
• Supports IEEE 802.3at and 802.3af powered device standards
• Includes internal power switch with adjustable current limiting protection

Applications

• High-power PoE endpoints requiring integrated power management
• Wireless access points and IP cameras with elevated power demands
• Industrial IoT devices operating in extended temperature environments

Procurement Notes

Verify the specific suffix BPWP corresponds to the 24-pin HTSSOP package when sourcing. Confirm that the component meets the required thermal performance specifications for your enclosure design. Ensure compatibility with your system's input voltage range before integration. Cross-reference the datasheet revision date to ensure all electrical characteristics match your design requirements.

Selection Notes

Select this component when a single-chip solution for both PoE detection and DC-DC regulation is required. It is suitable for designs needing up to 30W output power without external switching components. Consider the 24-pin HTSSOP footprint for PCB layout constraints. Evaluate thermal dissipation capabilities given the high power density in the compact package.

Part Context

This part belongs to the TPS2378 family of PoE controllers from Texas Instruments. While other variants like the TPS2378DDA offer similar functionality in smaller packages, the TPS23785BPWP provides enhanced thermal performance and higher pin count for complex control interfaces. It serves as a direct upgrade path for systems transitioning from lower-power PoE standards to PoE+ applications.

Replacement Considerations

The TPS2378DDA is a related variant within the same family but utilizes an SO-PowerPad-8 package. Verify if the reduced pin count and different thermal profile meet your application needs. No other direct public substitute part numbers are confirmed in the provided documentation.