TPS23882B Series

Type-3, two-pair, 8-channel PoE PSE controller with autonomous mode, SRAM and 200-mΩ RSENSE

Catalog

Type-3, two-pair, 8-channel PoE PSE controller with autonomous mode, SRAM and 200-mΩ RSENSE

Part	Function	Supplied Contents	Type	Primary Attributes	Secondary Attributes	Utilized IC / Part	Current - Supply	Number of Channels	Supplier Device Package	Mounting Type	Standards	Power - Max [Max]	Operating Temperature [Min]	Operating Temperature [Max]	Package / Case	Voltage - Supply [Max]	Voltage - Supply [Min]
Texas Instruments TPS23882EVM-008	Power Over Ethernet (POE)	Board(s)	Power Management	PoE Standard (PoE)	I2C Interface(s)	TPS23882
Texas Instruments TPS23882B1RTQR			Controller (PSE)				10 mA	8	56-VQFN (8x8)	Surface Mount	802.3at (PoE+) 802.3bt	65 W	-40 °C	125 ¯C	56-VFQFN Exposed Pad	57 V	44 V
Texas Instruments TPS23882RTQT			Controller (PSE)				10 mA	8	56-VQFN (8x8)	Surface Mount	802.3af (PoE) 802.3at (PoE+) 802.3bt	30 W	-40 °C	125 ¯C	56-VFQFN Exposed Pad	3.6 V	3 V

Catalog

Type-3, two-pair, 8-channel PoE PSE controller with autonomous mode, SRAM and 200-mΩ RSENSE

Key Features

• IEEE 802.3bt PSE solution for PoE 2Type-3 2-Pairpower over ethernet applicationsCompatible with TI’sFirmPSEsystem firmwareSRAM Programmable memoryProgrammable power limiting accuracy ±4%200-mΩ current sense resistorUser-selectable 15-W or 30-W autonomous mode with no MCU requiredSelectable 2-pair port power allocations4 W, 7 W, 15.4 W, or 30 WDedicated 14-bit integrating current ADC per portNoise immune MPS for DC disconnect2% current sensing accuracy1- or 3-bit fast port shutdown inputAuto-class discovery and power measurementNever fooled4-point detectionInrush and operational foldback protection425-mA and 1.25-A selectable current limitsPort re-mapping8-bit or 16-bit I2C communicationFlexible processor controlled operating modesAuto, semiauto and manual / diagnosticPer port voltage monitoring and telemetry–40 °C to +125 °C temperature operationIEEE 802.3bt PSE solution for PoE 2Type-3 2-Pairpower over ethernet applicationsCompatible with TI’sFirmPSEsystem firmwareSRAM Programmable memoryProgrammable power limiting accuracy ±4%200-mΩ current sense resistorUser-selectable 15-W or 30-W autonomous mode with no MCU requiredSelectable 2-pair port power allocations4 W, 7 W, 15.4 W, or 30 WDedicated 14-bit integrating current ADC per portNoise immune MPS for DC disconnect2% current sensing accuracy1- or 3-bit fast port shutdown inputAuto-class discovery and power measurementNever fooled4-point detectionInrush and operational foldback protection425-mA and 1.25-A selectable current limitsPort re-mapping8-bit or 16-bit I2C communicationFlexible processor controlled operating modesAuto, semiauto and manual / diagnosticPer port voltage monitoring and telemetry–40 °C to +125 °C temperature operation

Description

The TPS23882B is an 8-channel power sourcing equipment (PSE) controller engineered to insert power onto Ethernet cables in accordance with the IEEE 802.3bt standard. The PSE controller can detect powered devices (PDs) that have a valid signature, complete mutual identification, and apply power. The TPS23882B improves on the TPS2388 with reduced current sense resistors, SRAM programmability, programmable power limiting, capacitance measurement, and compatibility with TI’sFirmPSEsystem firmware (seeDevice Comparison Table). Programmable SRAM enables in-field firmware upgradability over I2C to ensure IEEE compliance and interoperability with the latest PoE enabled devices. Dedicated per port ADCs provide continuous port current monitoring and the ability to perform parallel classification measurements for faster port turn on times. A 1.25-A port current limit and adjustable power limiting allows for the support of non-standard applications above 60-W sourced. The 200-mΩ current sense resistor and external FET architecture allow designs to balance size, efficiency, thermal and solution cost requirements. Port remapping and pin-to-pin compatibility with the TPS2388, TPS23880, and TPS23881 devices eases migration from previous generation PSE designs and enables interchangeable 2-layer PCB designs to accommodate different system PoE power configurations. The TPS23882B is an 8-channel power sourcing equipment (PSE) controller engineered to insert power onto Ethernet cables in accordance with the IEEE 802.3bt standard. The PSE controller can detect powered devices (PDs) that have a valid signature, complete mutual identification, and apply power. The TPS23882B improves on the TPS2388 with reduced current sense resistors, SRAM programmability, programmable power limiting, capacitance measurement, and compatibility with TI’sFirmPSEsystem firmware (seeDevice Comparison Table). Programmable SRAM enables in-field firmware upgradability over I2C to ensure IEEE compliance and interoperability with the latest PoE enabled devices. Dedicated per port ADCs provide continuous port current monitoring and the ability to perform parallel classification measurements for faster port turn on times. A 1.25-A port current limit and adjustable power limiting allows for the support of non-standard applications above 60-W sourced. The 200-mΩ current sense resistor and external FET architecture allow designs to balance size, efficiency, thermal and solution cost requirements. Port remapping and pin-to-pin compatibility with the TPS2388, TPS23880, and TPS23881 devices eases migration from previous generation PSE designs and enables interchangeable 2-layer PCB designs to accommodate different system PoE power configurations.