●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 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.
● 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
