TPS23751 Series

IEEE 802.3at PoE interface with flyback DC-DC controller

Catalog

IEEE 802.3at PoE interface with flyback DC-DC controller

Part	Auxiliary Sense	Number of Channels	Mounting Type	Supplier Device Package	Voltage - Supply [Min]	Voltage - Supply [Max]	Type	Operating Temperature [Max]	Operating Temperature [Min]	Internal Switch(s)	Current - Supply	Power - Max [Max]	Standards	Package / Case	Package / Case
Texas Instruments TPS23751PWP		1	Surface Mount	16-HTSSOP	0 V	57 V	Controller (PD) DC/DC	85 °C	-40 °C		1.8 mA	25.5 W	802.3af (PoE) 802.3at (PoE+)	16-PowerTSSOP	0.173 in 4.4 mm Width
Texas Instruments TPS23751PWPR		1	Surface Mount	16-HTSSOP	0 V	57 V	Controller (PD) DC/DC	85 °C	-40 °C		1.8 mA	25.5 W	802.3af (PoE) 802.3at (PoE+)	16-PowerTSSOP	0.173 in 4.4 mm Width

Catalog

IEEE 802.3at PoE interface with flyback DC-DC controller

Key Features

• IEEE 802.3at Classification With Status FlagHigh Efficiency Solutions Over Wide Load RangePowers Up to 25.5 W PDsRobust 100 V, 0.5 Ω Hotswap MOSFETSynchronous Rectifier Disable SignalPowerPAD™ TSSOP PackagesComplete PoE Interface Plus DC-DC ControllerAdapter ORing SupportProgrammable FrequencyTPS23752 Supports Ultra-Low Power Sleep Modes–40°C to 125°C Junction Temperature RangeIEEE 802.3at Classification With Status FlagHigh Efficiency Solutions Over Wide Load RangePowers Up to 25.5 W PDsRobust 100 V, 0.5 Ω Hotswap MOSFETSynchronous Rectifier Disable SignalPowerPAD™ TSSOP PackagesComplete PoE Interface Plus DC-DC ControllerAdapter ORing SupportProgrammable FrequencyTPS23752 Supports Ultra-Low Power Sleep Modes–40°C to 125°C Junction Temperature Range

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 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. 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.