Texas Instruments TPS23751PWPR

Description
The TPS23751 is a 16-pin integrated circuit that combines a Power-over-Ethernet (PoE) powered device (PD) interface and a current-mode DC-DC controller optimized specifically for applications requiring high efficiency over a wide load range. The PoE interface implements type-2 hardware classification per IEEE 802.3at. It also includes an auxiliary power detect (APD) input and a disable function (DEN). A 0.5 Q, 100 V pass MOSFET minimizes heat dissipation and maximizes power utilization.
The DC-DC controller features internal soft-start, a bootstrap startup current source, current-mode control with slope compensation, blanking, and current limiting. Efficiency is enhanced at light loads by disabling synchronous rectification and entering variable frequency operation (VFO).
The TPS23752 is a 20-pin extended version of the TPS23751 with the addition of a Sleep Mode feature. Sleep Mode disables the converter to minimize power consumption while still generating the Maintain Power Signature (MPS) required by IEEE802.3at.

Features
IEEE 802.3at Classification with Status Flag
High Efficiency Solutions over Wide Load Range
Powers up to 25.5 W PDs
Robust 100 V, 0.5 Hotswap MOSFETs
Synchronous Rectifier Disable Signal
PowerPAD™ TSSOP Packages
Complete PoE Interface Plus DC-DC Controller
Adapter ORing Support
Programmable Frequency
TPS23752 Supports Ultra-Low Power Sleep Modes
-40°C to 125°C Junction Temperature Range

Applications
IEEE 802.3at-Compliant Devices
Video and VoIP Telephones
Multiband Access Points
Security Cameras
Pico-Base Stations