TPS23751

Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design TPS23751, TPS23752 SLVSB97E – JULY 2012 – REVISED JANUARY 2018 TPS2375x IEEE 802.3at PoE Interface With Flyback DC-DC Controller 1 Features 1 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 Ω Hotswap MOSFET 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 2 Applications IEEE 802.3at-Compliant Devices Video and VoIP Telephones Multiband Access Points Security Cameras Pico-Base Stations 3 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-Ω, 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 ...